Innervation Quiz Upper & Lower Extremity

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Quizzes Created: 1 | Total Attempts: 94

Questions: 73 | Attempts: 94 | Updated: Mar 20, 2023

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Innervation Quiz Upper & Lower Extremity - Quiz

Questions and Answers

1.

Triceps Brachii [long head]
- A.
  
  Radial Nerve
- B.
  
  Spinal Accessory Nerve
- C.
  
  Median Nerve
- D.
  
  Musculocutaneous Nerve
- E.
  
  Axillary Nerve
- F.
  
  Ulnar Nerve
Correct Answer
A. Radial Nerve

Explanation
The radial nerve is responsible for innervating the triceps brachii muscle, specifically the long head. This nerve originates from the brachial plexus and runs along the posterior aspect of the arm. It provides motor function to the triceps brachii, allowing for extension of the elbow joint. The other nerves listed are not directly associated with innervating the triceps brachii muscle.

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2.

Triceps Brachii [lateral head]
- A.
  
  Radial Nerve
- B.
  
  Spinal Accessory Nerve
- C.
  
  Median Nerve
- D.
  
  Musculocutaneous Nerve
- E.
  
  Ulnar Nerve
- F.
  
  Axillary Nerve
Correct Answer
A. Radial Nerve

Explanation
The radial nerve is responsible for innervating the triceps brachii muscle, specifically the lateral head. The triceps brachii is a muscle located at the back of the upper arm and is responsible for extending the elbow joint. The radial nerve supplies the necessary motor signals to the triceps brachii to carry out this function. Therefore, the radial nerve is the correct answer in this case.

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3.

Triceps Brachii [medial head]
- A.
  
  Radial Nerve
- B.
  
  Spinal Accessory Nerve
- C.
  
  Ulnar Nerve
- D.
  
  Musculocutaneous Nerve
- E.
  
  Median Nerve
- F.
  
  Axillary Nerve
Correct Answer
A. Radial Nerve

Explanation
The correct answer is Radial Nerve. The triceps brachii muscle is innervated by the radial nerve. This nerve is responsible for supplying the posterior compartment of the arm, including the triceps muscle. It is the largest branch of the brachial plexus and controls the extension of the elbow joint.

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4.

Brachioradialis
- A.
  
  Radial Nerve
- B.
  
  Ulnar Nerve
- C.
  
  Axillary Nerve
- D.
  
  Spinal Accessory Nerve
- E.
  
  Musculocutaneous Nerve
- F.
  
  Median Nerve
Correct Answer
A. Radial Nerve

Explanation
The radial nerve is the correct answer because it innervates the brachioradialis muscle. The brachioradialis muscle is located in the forearm and is responsible for flexing the forearm at the elbow joint. The radial nerve supplies motor innervation to this muscle, allowing it to contract and perform its function. The other nerves listed do not directly innervate the brachioradialis muscle.

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5.

Extensor Carpi Radialis Longus
- A.
  
  Radial Nerve
- B.
  
  Median Nerve
- C.
  
  Ulnar Nerve
- D.
  
  Axillary Nerve
- E.
  
  Spinal Accessory Nerve
- F.
  
  Musculocutaneous Nerve
Correct Answer
A. Radial Nerve

Explanation
The radial nerve is responsible for innervating the extensor carpi radialis longus muscle. This muscle is located in the forearm and is responsible for extending and abducting the wrist. The radial nerve originates from the brachial plexus and travels down the arm, providing motor and sensory innervation to various muscles and areas of the arm and hand. Therefore, the radial nerve is the correct answer in this case.

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6.

Anconeous
- A.
  
  Radial Nerve
- B.
  
  Median Nerve
- C.
  
  Ulnar Nerve
- D.
  
  Axillary Nerve
- E.
  
  Spinal Accessory Nerve
- F.
  
  Musculocutaneous Nerve
Correct Answer
A. Radial Nerve

Explanation
The radial nerve is responsible for the innervation of the anconeous muscle. The anconeous muscle is located in the posterior compartment of the arm and assists in extension of the forearm at the elbow joint. The radial nerve travels along the back of the arm and provides motor and sensory innervation to various muscles and areas of the arm, forearm, and hand. Therefore, it makes sense that the radial nerve would be the correct answer for the innervation of the anconeous muscle.

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7.

Extensor Carpi Radialis Brevis
- A.
  
  Radial Nerve
- B.
  
  Ulnar Nerve
- C.
  
  Median Nerve
- D.
  
  Axillary Nerve
- E.
  
  Spinal Accessory Nerve
- F.
  
  Musculocutaneous Nerve
Correct Answer
A. Radial Nerve

Explanation
The extensor carpi radialis brevis is innervated by the radial nerve. The radial nerve is responsible for providing motor innervation to the muscles of the posterior compartment of the forearm, including the extensor carpi radialis brevis. This muscle is involved in extending and abducting the wrist. Therefore, the correct answer is the radial nerve.

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8.

Supinator
- A.
  
  Radial Nerve
- B.
  
  Ulnar Nerve
- C.
  
  Median Nerve
- D.
  
  Axillary Nerve
- E.
  
  Spinal Accessory Nerve
- F.
  
  Musculocutaneous Nerve
Correct Answer
A. Radial Nerve

Explanation
The radial nerve is responsible for the supination of the forearm. It innervates the supinator muscle, which is responsible for rotating the forearm outward. The other nerves listed do not have a direct role in supination. The ulnar nerve innervates muscles in the hand, the median nerve innervates muscles in the forearm and hand, the axillary nerve innervates the deltoid muscle, and the spinal accessory nerve innervates the trapezius muscle. The musculocutaneous nerve innervates the biceps brachii muscle.

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9.

Extensor Digitorum
- A.
  
  Radial Nerve
- B.
  
  Median Nerve
- C.
  
  Ulnar Nerve
- D.
  
  Axillary Nerve
- E.
  
  Spinal Accessory Nerve
- F.
  
  Musculocutaneous Nerve
Correct Answer
A. Radial Nerve

Explanation
The radial nerve is responsible for innervating the extensor digitorum muscle. This muscle is located in the forearm and is responsible for extending the fingers. The radial nerve originates from the brachial plexus and travels down the arm, supplying motor and sensory innervation to various muscles and areas of the arm. Therefore, the radial nerve is the correct answer in this context.

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10.

Extensor Digiti Minimi
- A.
  
  Radial Nerve
- B.
  
  Ulnar Nerve
- C.
  
  Median Nerve
- D.
  
  Axillary Nerve
- E.
  
  Spinal Accessory Nerve
- F.
  
  Musculocutaneous Nerve
Correct Answer
A. Radial Nerve

Explanation
The extensor digiti minimi is a muscle located in the forearm that is responsible for extending the little finger. The radial nerve is the correct answer because it innervates this muscle, meaning it provides the necessary nerve signals for the muscle to contract and perform its function. The other nerves listed do not innervate the extensor digiti minimi muscle.

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11.

Extensor Carpi Ulnaris
- A.
  
  Radial
- B.
  
  Ulnar
- C.
  
  Median
- D.
  
  Axillary
- E.
  
  Musculocutaneous
- F.
  
  Spinal Accessory Nerve
Correct Answer
A. Radial

Explanation
The extensor carpi ulnaris is a muscle located in the forearm that is responsible for extending and adducting the wrist. It is innervated by the radial nerve, which is one of the main nerves of the arm. The radial nerve supplies the extensor muscles of the forearm, including the extensor carpi ulnaris, allowing them to contract and perform their functions. Therefore, the correct answer is radial.

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12.

Abductor Pollicis Longus
- A.
  
  Radial Nerve
- B.
  
  Ulnar Nerve
- C.
  
  Axillary Nerve
- D.
  
  Spinal Accessory Nerve
- E.
  
  Musculocutaneous Nerve
Correct Answer
A. Radial Nerve

Explanation
The correct answer is the Radial Nerve. The Radial Nerve is responsible for the innervation of the Abductor Pollicis Longus muscle. This muscle is located in the forearm and is responsible for the abduction of the thumb. The Radial Nerve originates from the brachial plexus and supplies motor and sensory innervation to the posterior compartment of the arm and forearm.

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13.

Extensor Pollicis Brevis
- A.
  
  Radial Nerve
- B.
  
  Ulnar Nerve
- C.
  
  Median Nerve
- D.
  
  Musculocutaneous Nerve
- E.
  
  Axillary Nerve
- F.
  
  Spinal Accessory Nerve
Correct Answer
A. Radial Nerve

Explanation
The radial nerve innervates the extensor pollicis brevis muscle. This muscle is located in the forearm and is responsible for extending the thumb. The other nerves listed do not innervate this specific muscle.

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14.

Extensor Pollicis Longus
- A.
  
  Radial Nerve
- B.
  
  Median Nerve
- C.
  
  Ulnar Nerve
- D.
  
  Axillary Nerve
- E.
  
  Spinal Accessory Nerve
- F.
  
  Musculocutaneous Nerve
Correct Answer
A. Radial Nerve

Explanation
The extensor pollicis longus is innervated by the radial nerve. The radial nerve is responsible for providing motor innervation to the muscles of the posterior compartment of the forearm, including the extensor muscles. The extensor pollicis longus is a muscle located in the forearm that extends the thumb. Therefore, it makes sense that it would be innervated by the radial nerve, which controls the extensor muscles of the forearm.

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15.

Extensor Indicis
- A.
  
  Radial Nerve
- B.
  
  Median Nerve
- C.
  
  Ulnar Nerve
- D.
  
  Axillary Nerve
- E.
  
  Spinal Accessory Nerve
- F.
  
  Musculocutaneous Nerve
Correct Answer
A. Radial Nerve

Explanation
The radial nerve is responsible for innervating the extensor indicis muscle. This muscle is located in the forearm and is responsible for extending the index finger. The radial nerve originates from the brachial plexus and runs down the arm, supplying sensation and motor function to various muscles in the forearm and hand. Therefore, the radial nerve is the correct answer for the given question.

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16.

Trapezius
- A.
  
  Spinal Accessory Nerve
- B.
  
  Median Nerve
- C.
  
  Radial Nerve
- D.
  
  Ulnar Nerve
- E.
  
  Axillary Nerve
- F.
  
  Musculocutaneous Nerve
Correct Answer
A. Spinal Accessory Nerve

Explanation
The spinal accessory nerve is responsible for innervating the trapezius muscle. This nerve controls the movement of the trapezius muscle, which is located in the upper back and neck. The trapezius muscle is important for various movements of the shoulder, such as shrugging, rotating, and retracting the scapula. Therefore, the spinal accessory nerve is the correct answer as it directly relates to the innervation of the trapezius muscle.

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17.

Sternocleidomastoid
- A.
  
  Spinal Accessory Nerve
- B.
  
  Median Nerve
- C.
  
  Radial Nerve
- D.
  
  Ulnar Nerve
- E.
  
  Axillary Nerve
- F.
  
  Musculocutaneous Nerve
Correct Answer
A. Spinal Accessory Nerve

Explanation
The sternocleidomastoid muscle is innervated by the spinal accessory nerve. This nerve originates from the brainstem and travels through the neck to supply motor innervation to the sternocleidomastoid and trapezius muscles. The other nerves listed, such as the median, radial, ulnar, axillary, and musculocutaneous nerves, do not innervate the sternocleidomastoid muscle. Therefore, the correct answer is the spinal accessory nerve.

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18.

Pronator Teres
- A.
  
  Median Nerve
- B.
  
  Radial Nerve
- C.
  
  Ulnar Nerve
- D.
  
  Axillary Nerve
- E.
  
  Spinal Accessory Nerve
- F.
  
  Musculocutaneous Nerve
Correct Answer
A. Median Nerve

Explanation
The pronator teres muscle is innervated by the median nerve. The median nerve is responsible for providing sensory and motor innervation to the muscles in the forearm, including the pronator teres. It also supplies sensation to the palm, thumb, index, middle, and half of the ring fingers.

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19.

Flexor Carpi Radialis
- A.
  
  Median Nerve
- B.
  
  Axillary Nerve
- C.
  
  Ulnar Nerve
- D.
  
  Spinal Accessory Nerve
- E.
  
  Musculocutaneous Nerve
- F.
  
  Radial Nerve
Correct Answer
A. Median Nerve

Explanation
The median nerve is responsible for innervating the flexor carpi radialis muscle. This muscle is located in the forearm and is responsible for flexing the wrist. The median nerve originates from the brachial plexus and travels down the arm, supplying sensation and motor function to the hand and forearm. It is one of the major nerves in the upper limb and plays a crucial role in hand movements and dexterity.

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20.

Palmaris Longus
- A.
  
  Median Nerve
- B.
  
  Axillary Nerve
- C.
  
  Ulnar Nerve
- D.
  
  Spinal Accessory Nerve
- E.
  
  Musculocutaneous Nerve
- F.
  
  Radial Nerve
Correct Answer
A. Median Nerve

Explanation
The median nerve is the correct answer because it is one of the major nerves in the upper limb. It innervates several muscles in the forearm and hand, including the flexor muscles of the wrist and fingers. It also provides sensory innervation to the palm and fingers. The other nerves listed are also important nerves in the upper limb, but they do not have the same functions as the median nerve.

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21.

Flexor Digitorum Superficialis
- A.
  
  Median Nerve
- B.
  
  Radial Nerve
- C.
  
  Ulnar Nerve
- D.
  
  Axillary Nerve
- E.
  
  Spinal Accessory Nerve
- F.
  
  Musculocutaneous Nerve
Correct Answer
A. Median Nerve

Explanation
The correct answer is Median Nerve. The flexor digitorum superficialis is innervated by the median nerve. This muscle is responsible for flexing the fingers at the proximal interphalangeal joints. The median nerve originates from the brachial plexus and supplies motor innervation to several muscles in the forearm, including the flexor digitorum superficialis.

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22.

Flexor Digitorum Profundus (Radial Portion)
- A.
  
  Median Nerve
- B.
  
  Radial Nerve
- C.
  
  Ulnar Nerve
- D.
  
  Axillary Nerve
- E.
  
  Spinal Accessory Nerve
- F.
  
  Musculocutaneous Nerve
Correct Answer
A. Median Nerve

Explanation
The flexor digitorum profundus muscle is innervated by the median nerve. The median nerve is responsible for providing motor innervation to the flexor muscles of the forearm, including the flexor digitorum profundus. It originates from the brachial plexus, passes through the arm, and supplies sensation to the hand. The other nerves listed, such as the radial, ulnar, axillary, spinal accessory, and musculocutaneous nerves, do not innervate the flexor digitorum profundus muscle.

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23.

Flexor Pollicis Longus
- A.
  
  Median Nerve
- B.
  
  Radial Nerve
- C.
  
  Ulnar Nerve
- D.
  
  Axillary Nerve
- E.
  
  Spinal Accessory Nerve
- F.
  
  Musculocutaneous Nerve
Correct Answer
A. Median Nerve

Explanation
The flexor pollicis longus is innervated by the median nerve. The median nerve is responsible for supplying motor innervation to the flexor pollicis longus muscle, which is located in the forearm and is responsible for flexing the thumb. The other nerves listed in the options do not innervate the flexor pollicis longus muscle.

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24.

Pronator Quadratus
- A.
  
  Median Nerve
- B.
  
  Radial Nerve
- C.
  
  Ulnar Nerve
- D.
  
  Axillary Nerve
- E.
  
  Spinal Accessory Nerve
- F.
  
  Musculocutaneous Nerve
Correct Answer
A. Median Nerve

Explanation
The median nerve is responsible for innervating the pronator quadratus muscle. The pronator quadratus is a deep muscle of the forearm that plays a key role in pronation of the forearm. When the median nerve is damaged or compressed, it can result in weakness or paralysis of the pronator quadratus muscle, leading to difficulty in pronating the forearm. Therefore, the correct answer is Median Nerve.

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25.

Abductor Pollicis Brevis
- A.
  
  Median Nerve
- B.
  
  Ulnar Nerve
- C.
  
  Radial Nerve
- D.
  
  Axillary Nerve
- E.
  
  Musculocutaneous Nerve
- F.
  
  Spinal Accessory Nerve
Correct Answer
A. Median Nerve

Explanation
The correct answer is the Median Nerve. The abductor pollicis brevis is a muscle located in the hand that is responsible for abducting the thumb. The median nerve innervates this muscle, along with several other muscles in the forearm and hand. It is one of the major nerves in the upper limb and provides motor and sensory innervation to various muscles and areas of the hand.

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26.

Opponens Pollicis
- A.
  
  Median Nerve
- B.
  
  Radial Nerve
- C.
  
  Ulnar Nerve
- D.
  
  Axillary Nerve
- E.
  
  Spinal Accessory Nerve
- F.
  
  Musculocutaneous Nerve
Correct Answer
A. Median Nerve

Explanation
The median nerve is responsible for innervating the opponens pollicis muscle. The opponens pollicis is a muscle in the hand that allows for opposition of the thumb, which is the movement that allows us to touch the thumb to the other fingers. The median nerve is one of the major nerves in the upper limb and provides sensory and motor innervation to the muscles of the forearm and hand.

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27.

Flexor Pollicis Brevis Superficialis
- A.
  
  Median Nerve
- B.
  
  Radial Nerve
- C.
  
  Ulnar Nerve
- D.
  
  Axillary Nerve
- E.
  
  Spinal Accessory Nerve
- F.
  
  Musculocutaneous Nerve
Correct Answer
A. Median Nerve

Explanation
The flexor pollicis brevis superficialis is innervated by the median nerve.

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28.

1st & 2nd Lumbricals
- A.
  
  Median Nerve
- B.
  
  Ulnar Nerve
- C.
  
  Radial Nerve
- D.
  
  Axillary Nerve
- E.
  
  Spinal Accessory Nerve
- F.
  
  Musculocutaneous Nerve
Correct Answer
A. Median Nerve

Explanation
The median nerve innervates the 1st and 2nd lumbricals. The lumbricals are intrinsic hand muscles that flex the metacarpophalangeal joints and extend the interphalangeal joints. The median nerve originates from the brachial plexus and supplies motor and sensory innervation to the forearm and hand. It passes through the carpal tunnel and can be compressed in conditions such as carpal tunnel syndrome, leading to symptoms like hand weakness and numbness.

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29.

Coracobrachilis
- A.
  
  Musculocutaneous Nerve
- B.
  
  Radial Nerve
- C.
  
  Ulnar Nerve
- D.
  
  Median Nerve
- E.
  
  Axillary Nerve
- F.
  
  Spinal Accessory Nerve
Correct Answer
A. Musculocutaneous Nerve

Explanation
The correct answer is the Musculocutaneous Nerve. The Musculocutaneous Nerve is responsible for providing motor innervation to the muscles of the anterior compartment of the arm, including the Coracobrachialis muscle. It also provides sensory innervation to the lateral forearm. Therefore, the Musculocutaneous Nerve is the nerve that innervates the Coracobrachialis muscle.

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30.

Biceps Brachii
- A.
  
  Musculocutaneous Nerve
- B.
  
  Radial Nerve
- C.
  
  Ulnar Nerve
- D.
  
  Axillary Nerve
- E.
  
  Median Nerve
- F.
  
  Spinal Accessory Nerve
Correct Answer
A. Musculocutaneous Nerve

Explanation
The musculocutaneous nerve is responsible for innervating the biceps brachii muscle. This nerve originates from the brachial plexus and provides motor function to the muscles in the anterior compartment of the arm. It also provides sensory innervation to the lateral aspect of the forearm. Therefore, the musculocutaneous nerve is the correct answer in this case.

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31.

Brachialis
- A.
  
  Musculocutaneous Nerve
- B.
  
  Radial Nerve
- C.
  
  Medial Nerve
- D.
  
  Ulnar Nerve
- E.
  
  Axillary Nerve
- F.
  
  Spinal Accessory Nerve
Correct Answer
A. Musculocutaneous Nerve

Explanation
The musculocutaneous nerve is responsible for innervating the brachialis muscle. It originates from the lateral cord of the brachial plexus and provides motor innervation to the muscles of the anterior compartment of the arm, including the brachialis. Additionally, it also provides sensory innervation to the lateral aspect of the forearm through its cutaneous branches. Therefore, the musculocutaneous nerve is the correct answer in this context.

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32.

Flexor Carpi Ulnairs
- A.
  
  Ulnar Nerve
- B.
  
  Radial Nerve
- C.
  
  Median Nerve
- D.
  
  Axillary Nerve
- E.
  
  Spinal Accessory Nerve
- F.
  
  Musculocutaneous Nerve
Correct Answer
A. Ulnar Nerve

Explanation
The ulnar nerve is responsible for innervating the flexor carpi ulnaris muscle. This muscle is located in the forearm and is responsible for flexing the wrist. The ulnar nerve originates from the brachial plexus in the neck and travels down the arm to innervate various muscles and provide sensation to the hand. In this case, it specifically innervates the flexor carpi ulnaris muscle, allowing it to contract and perform its function of flexing the wrist.

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33.

Flexor Digitorum Profundus [ulnar portion]
- A.
  
  Ulnar Nerve
- B.
  
  Radial Nerve
- C.
  
  Median Nerve
- D.
  
  Axillary Nerve
- E.
  
  Musculocutaneous Nerve
- F.
  
  Spinal Accessory Nerve
Correct Answer
A. Ulnar Nerve

Explanation
The correct answer is the Ulnar Nerve. The Flexor Digitorum Profundus is innervated by the ulnar nerve. This nerve originates from the brachial plexus and supplies motor and sensory innervation to the ulnar side of the forearm and hand. The Flexor Digitorum Profundus is responsible for flexing the distal interphalangeal joints of the fingers.

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34.

Adductor Pollicis
- A.
  
  Ulnar Nerve
- B.
  
  Radial Nerve
- C.
  
  Median Nerve
- D.
  
  Axillary Nerve
- E.
  
  Spinal Accessory Nerve
- F.
  
  Musculocutaneous Nerve
Correct Answer
A. Ulnar Nerve

Explanation
The ulnar nerve is responsible for innervating the adductor pollicis muscle. This muscle is located in the hand and is responsible for adducting the thumb towards the palm. The ulnar nerve is one of the major nerves in the arm and supplies sensation to the pinky finger and half of the ring finger. It also controls the movement of several muscles in the hand and forearm. Therefore, it makes sense that the ulnar nerve would be the correct answer for the innervation of the adductor pollicis muscle.

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35.

Flexor Pollicis Brevis [deep head]
- A.
  
  Ulnar Nerve
- B.
  
  Radial Nerve
- C.
  
  Axillary Nerve
- D.
  
  Median Nerve
- E.
  
  Spinal Accessory Nerve
- F.
  
  Musculocutaneous Nerve
Correct Answer
A. Ulnar Nerve

Explanation
The correct answer is the Ulnar Nerve. The Flexor Pollicis Brevis is innervated by the Ulnar Nerve.

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36.

Palmar Interossei
- A.
  
  Ulnar Nerve
- B.
  
  Radial Nerve
- C.
  
  Median Nerve
- D.
  
  Axillary Nerve
- E.
  
  Spinal Accessory Nerve
- F.
  
  Musculocutaneous Nerve
Correct Answer
A. Ulnar Nerve

Explanation
The ulnar nerve is responsible for innervating the palmar interossei muscles. These muscles are located in the hand and are involved in finger abduction and adduction. The ulnar nerve originates from the brachial plexus and travels down the arm, passing through the cubital tunnel at the elbow. From there, it continues into the hand, supplying sensation to the medial side of the hand and innervating the muscles that control fine motor movements of the fingers.

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37.

Abductor Digiti Minimi
- A.
  
  Ulnar Nerve
- B.
  
  Radial Nerve
- C.
  
  Axillary Nerve
- D.
  
  Median Nerve
- E.
  
  Spinal Accessory Nerve
- F.
  
  Musculocutaneous Nerve
Correct Answer
A. Ulnar Nerve

Explanation
The ulnar nerve innervates the abductor digiti minimi muscle. This muscle is responsible for the abduction of the little finger, which means it moves the little finger away from the other fingers. The ulnar nerve is one of the major nerves in the upper limb and it supplies sensation to the little finger and half of the ring finger. It also controls the muscles of the hand that are responsible for fine motor movements. Therefore, it makes sense that the ulnar nerve would be the correct answer for the innervation of the abductor digiti minimi muscle.

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38.

Opponens Digiti Minimi
- A.
  
  Ulnar Nerve
- B.
  
  Radial Nerve
- C.
  
  Median Nerve
- D.
  
  Axillary Nerve
- E.
  
  Spinal Accessory Nerve
- F.
  
  Musculocutaneous Nerve
Correct Answer
A. Ulnar Nerve

Explanation
The ulnar nerve is the correct answer because the opponens digiti minimi is innervated by the ulnar nerve. The opponens digiti minimi is a muscle located in the hand that helps with opposition and flexion of the little finger. The ulnar nerve is responsible for supplying motor and sensory innervation to the hand, specifically the little finger and half of the ring finger. Therefore, it is the nerve that controls the opponens digiti minimi muscle.

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39.

Flexor Digiti Minimi
- A.
  
  Ulnar Nerve
- B.
  
  Radial Nerve
- C.
  
  Axillary Nerve
- D.
  
  Median Nerve
- E.
  
  Spinal Accessory Nerve
- F.
  
  Musculocutaneous Nerve
Correct Answer
A. Ulnar Nerve

Explanation
The ulnar nerve is responsible for innervating the Flexor Digiti Minimi muscle. This muscle is located in the hand and is responsible for flexing the little finger. The ulnar nerve runs along the ulnar side of the forearm and passes through the Guyon's canal, which is located at the wrist. Damage or compression of the ulnar nerve can result in weakness or paralysis of the Flexor Digiti Minimi muscle, leading to difficulties in flexing the little finger.

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40.

Dorsal Interossei
- A.
  
  Ulnar Nerve
- B.
  
  Radial Nerve
- C.
  
  Axillary Nerve
- D.
  
  Median Nerve
- E.
  
  Spinal Accessory Nerve
- F.
  
  Musculocutaneous Nerve
Correct Answer
A. Ulnar Nerve

Explanation
The ulnar nerve is responsible for innervating the dorsal interossei muscles. The dorsal interossei muscles are located in the hand and are responsible for abduction and adduction of the fingers. When the ulnar nerve is damaged or compressed, it can result in weakness or paralysis of these muscles, leading to difficulty in performing these actions. Therefore, the ulnar nerve is the correct answer in this case.

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41.

3rd & 4th Lumbricals
- A.
  
  Ulnar Nerve
- B.
  
  Radial Nerve
- C.
  
  Axillary Nerve
- D.
  
  Spinal Accessory Nerve
- E.
  
  Median Nerve
- F.
  
  Musculocutaneous Nerve
Correct Answer
A. Ulnar Nerve

Explanation
The ulnar nerve innervates the 3rd and 4th lumbrical muscles. The lumbricals are small muscles in the hand that help with finger flexion and extension. The ulnar nerve is responsible for providing motor innervation to these muscles. It travels along the ulnar side of the forearm and passes through the Guyon's canal to reach the hand. Damage or compression of the ulnar nerve can result in weakness or loss of function in the 3rd and 4th lumbricals, leading to impaired finger movements.

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42.

Deltoid
- A.
  
  Axillary Nerve
- B.
  
  Medial Nerve
- C.
  
  Radial Nerve
- D.
  
  Ulnar Nerve
- E.
  
  Spinal Accessory Nerve
- F.
  
  Musculocutaneous Nerve
Correct Answer
A. Axillary Nerve

Explanation
The axillary nerve is the correct answer because it is one of the nerves that innervates the deltoid muscle. The deltoid muscle is located in the shoulder and is responsible for abducting the arm. The axillary nerve originates from the brachial plexus and supplies motor innervation to the deltoid muscle, as well as sensory innervation to the skin over the deltoid muscle. Therefore, damage to the axillary nerve can result in weakness or paralysis of the deltoid muscle, leading to difficulty in raising the arm.

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43.

Teres Minor
- A.
  
  Axillary Nerve
- B.
  
  Median Nerve
- C.
  
  Radial Nerve
- D.
  
  Ulnar Nerve
- E.
  
  Spinal Accessory Nerve
- F.
  
  Musculocutaneous Nerve
Correct Answer
A. Axillary Nerve

Explanation
The axillary nerve is responsible for innervating the teres minor muscle, which is one of the muscles in the rotator cuff of the shoulder. The axillary nerve also innervates the deltoid muscle, which is responsible for shoulder abduction. Therefore, the axillary nerve is the correct answer as it is directly related to the teres minor muscle.

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44.

Hypothenar Eminence
- A.
  
  Ulnar Nerve
- B.
  
  Radial Nerve
- C.
  
  Median Nerve
- D.
  
  Axillary Nerve
- E.
  
  Spinal Accessory Nerve
- F.
  
  Musculocutaneous Nerve
Correct Answer
A. Ulnar Nerve

Explanation
The ulnar nerve is responsible for innervating the muscles of the hypothenar eminence, which is a muscular prominence located on the palm of the hand, near the base of the little finger. This nerve also provides sensation to the little finger and part of the ring finger. Therefore, the ulnar nerve is the correct answer because it is directly related to the hypothenar eminence.

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45.

Thenar Eminence
- A.
  
  Median Nerve
- B.
  
  Ulnar Nerve
- C.
  
  Radial Nerve
- D.
  
  Axillary Nerve
- E.
  
  Spinal Accessory Nerve
- F.
  
  Musculocutaneous Nerve
Correct Answer
A. Median Nerve

Explanation
The median nerve is the correct answer because it is responsible for innervating the thenar eminence. The thenar eminence is a muscle group located at the base of the thumb and is responsible for the movement and control of the thumb. The median nerve also innervates other muscles in the forearm and hand, providing sensation and motor function to these areas.

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46.

Peroneus Longus
- A.
  
  Superficial Peroneal Nerve
- B.
  
  Tibial Nerve
- C.
  
  Obturator Nerve
- D.
  
  Femoral Nerve
Correct Answer
A. Superficial Peroneal Nerve

Explanation
The superficial peroneal nerve is responsible for innervating the peroneus longus muscle. This nerve originates from the common peroneal nerve, which is a branch of the sciatic nerve. The peroneus longus muscle is located in the lateral compartment of the leg and is responsible for plantar flexion and eversion of the foot. The superficial peroneal nerve supplies motor innervation to this muscle, allowing it to perform these actions. Therefore, the superficial peroneal nerve is the correct answer in this case.

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47.

Peroneus Brevis
- A.
  
  Superficial Peroneal Nerve
- B.
  
  Deep Peroneal Nerve
- C.
  
  Femoral Nerve
- D.
  
  Obturator Nerve
Correct Answer
A. Superficial Peroneal Nerve

Explanation
The superficial peroneal nerve is the correct answer because it innervates the peroneus brevis muscle. The peroneus brevis muscle is located on the lateral side of the leg and is responsible for plantar flexion and eversion of the foot. The superficial peroneal nerve also provides sensory innervation to the skin on the lower leg and the dorsum of the foot. The other nerves listed, such as the deep peroneal nerve, femoral nerve, and obturator nerve, do not innervate the peroneus brevis muscle.

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48.

Tibialis Anterior
- A.
  
  Deep Peroneal Nerve
- B.
  
  Tibial Nerve
- C.
  
  Obturator Nerve
- D.
  
  Femoral Nerve
Correct Answer
A. Deep Peroneal Nerve

Explanation
The deep peroneal nerve is responsible for innervating the tibialis anterior muscle. This muscle is located in the front of the leg and is responsible for dorsiflexion of the foot and inversion of the ankle. The deep peroneal nerve originates from the common peroneal nerve and supplies motor innervation to the muscles in the anterior compartment of the leg. Therefore, it is the correct answer in this context.

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49.

Extensor Digitorum Longus
- A.
  
  Deep Peroneal Nerve
- B.
  
  Sciatic Nerve
- C.
  
  Tibial Nerve
- D.
  
  Femoral Nerve
Correct Answer
A. Deep Peroneal Nerve

Explanation
The deep peroneal nerve is responsible for innervating the extensor digitorum longus muscle. This muscle is located in the anterior compartment of the leg and is responsible for extending the toes. The deep peroneal nerve originates from the common peroneal nerve and supplies motor innervation to the muscles in the anterior compartment of the leg. Therefore, it is the correct answer in this case.

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50.

Extensor Hallicus Longus
- A.
  
  Deep Peroneal Nerve
- B.
  
  Tibial Nerve
- C.
  
  Obturator Nerve
- D.
  
  Femoral Nerve
Correct Answer
A. Deep Peroneal Nerve

Explanation
The deep peroneal nerve is responsible for innervating the extensor hallucis longus muscle. This muscle is located in the anterior compartment of the leg and is responsible for extending the big toe. The deep peroneal nerve originates from the common peroneal nerve and provides motor innervation to the muscles in the anterior compartment of the leg. Therefore, it is the correct answer in this case.

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Current Version
Mar 20, 2023

Quiz Edited by
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Feb 07, 2018

Quiz Created by
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Innervation Quiz Upper & Lower Extremity

Triceps Brachii [long head]

Triceps Brachii [lateral head]

Triceps Brachii [medial head]

Brachioradialis

Extensor Carpi Radialis Longus

Anconeous

Extensor Carpi Radialis Brevis

Supinator

Extensor Digitorum

Extensor Digiti Minimi

Extensor Carpi Ulnaris

Abductor Pollicis Longus

Extensor Pollicis Brevis

Extensor Pollicis Longus

Extensor Indicis

Trapezius

Sternocleidomastoid

Pronator Teres

Flexor Carpi Radialis

Palmaris Longus

Flexor Digitorum Superficialis

Flexor Digitorum Profundus (Radial Portion)

Flexor Pollicis Longus

Pronator Quadratus

Abductor Pollicis Brevis

Opponens Pollicis

Flexor Pollicis Brevis Superficialis

1st & 2nd Lumbricals

Coracobrachilis

Biceps Brachii

Brachialis

Flexor Carpi Ulnairs

Flexor Digitorum Profundus [ulnar portion]

Adductor Pollicis

Flexor Pollicis Brevis [deep head]

Palmar Interossei

Abductor Digiti Minimi

Opponens Digiti Minimi

Flexor Digiti Minimi

Dorsal Interossei

3rd & 4th Lumbricals

Deltoid

Teres Minor

Hypothenar Eminence

Thenar Eminence

Peroneus Longus

Peroneus Brevis

Tibialis Anterior

Extensor Digitorum Longus

Extensor Hallicus Longus