Origin Insertion And Movement Of Shoulder Girdle Muscles
Origin Insertion and Movement of Shoulder Girdle Muscles
Questions and Answers
- 1.
The subscapularis originates on the
Explanation
The subscapularis muscle originates on the subscapular fossa. The subscapular fossa is a depression on the anterior (front) surface of the scapula (shoulder blade). This muscle is one of the four muscles that make up the rotator cuff in the shoulder. It plays a crucial role in shoulder movement and stability, as it helps to internally rotate the arm and hold the head of the humerus (upper arm bone) in the shoulder socket.Rate this question:
- 2.
The medial deltoids originate on
Explanation
The medial deltoids originate from three different points: the lateral aspect of the acromion, the acromion process, and the acromion. These three points are all located in the shoulder area and contribute to the origin of the medial deltoids.Rate this question:
- 3.
The coracobrachialis originates on the
Explanation
The coracobrachialis muscle originates on the coracoid process. The coracoid process is a bony projection located on the scapula (shoulder blade). It serves as the attachment point for several muscles, including the coracobrachialis. This muscle helps to flex and adduct the arm at the shoulder joint. Therefore, the correct answer is coracoid process.Rate this question:
- 4.
The pectoralis major upper fibres originate on the
Explanation
The pectoralis major upper fibres originate on the anterior surface of the clavicle. This means that the upper fibers of the pectoralis major muscle start from the front side of the clavicle bone. The clavicle is also known as the collarbone, and it is located in the upper chest area. The pectoralis major muscle is responsible for movements of the shoulder joint, such as flexion, adduction, and medial rotation. The origin of the muscle fibers on the anterior surface of the clavicle indicates the starting point of these fibers for their attachment and subsequent action.Rate this question:
- 5.
The anterior deltoids originate on the
Explanation
The correct answer is "anterior aspect of clavicle, clavicle." The anterior deltoids are a group of muscles located at the front of the shoulder. They originate on the anterior aspect of the clavicle, which means they attach to the front part of the collarbone. This attachment point allows the anterior deltoids to play a role in shoulder flexion and horizontal shoulder adduction.Rate this question:
- 6.
Which of these muscles insert on the intertubercular groove
- A.
Latissimus Dorsi
- B.
Teres Major
- C.
Coracobrachialis
Correct Answer(s)
A. Latissimus Dorsi
B. Teres MajorExplanation
The latissimus dorsi and teres major muscles both insert on the intertubercular groove. The intertubercular groove is located on the anterior aspect of the humerus, between the greater and lesser tubercles. These muscles play a role in shoulder movement and stability, with the latissimus dorsi being responsible for adduction, extension, and medial rotation of the arm, while the teres major assists in adduction and medial rotation. The coracobrachialis muscle, on the other hand, inserts on the coracoid process of the scapula and does not insert on the intertubercular groove.Rate this question:
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- 7.
Which of these muscles is responsible for flexion?
- A.
Teres Major
- B.
Supraspinatus
- C.
Deltoid Anterior
- D.
Coracobrachialis
Correct Answer
C. Deltoid AnteriorExplanation
The deltoid anterior muscle is responsible for flexion. It is located in the shoulder and is one of the three parts of the deltoid muscle. When this muscle contracts, it helps to flex the shoulder joint, allowing for movements such as raising the arm forward or lifting objects in front of the body. The other muscles listed, Teres Major, Supraspinatus, and Coracobrachialis, are not primarily responsible for flexion.Rate this question:
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- 8.
The subscapularis inserts on the
Correct Answer
lesser tubercleExplanation
The subscapularis muscle is one of the four muscles that make up the rotator cuff in the shoulder. It originates from the subscapular fossa of the scapula and inserts on the lesser tubercle of the humerus. This means that the muscle attaches to the smaller bump on the upper part of the humerus bone. The subscapularis muscle plays a crucial role in internal rotation and stabilization of the shoulder joint.Rate this question:
- 9.
All deltoids insert on the
Correct Answer
deltoid tuberosityExplanation
The deltoid tuberosity is the site of insertion for all deltoid muscles. This means that the deltoid muscles attach to the deltoid tuberosity, which is a bony prominence on the humerus bone. The deltoid muscles are responsible for various movements of the shoulder joint, such as abduction, flexion, and extension. The insertion of the deltoid muscles on the deltoid tuberosity allows them to exert their pulling force on the humerus bone, enabling these shoulder movements.Rate this question:
- 10.
The posterior deltoids originate on the
Correct Answer
inferior spine
spine of the scapula
spineExplanation
The posterior deltoids originate on the inferior spine and the spine of the scapula. These two points of origin provide attachment for the muscle fibers of the posterior deltoids. The inferior spine refers to the bony prominence located on the back side of the scapula, while the spine of the scapula is a ridge-like structure running along the scapula. The combination of these two origins allows the posterior deltoids to play a role in various movements of the shoulder, such as shoulder extension, horizontal abduction, and internal rotation.Rate this question:
- 11.
The supraspinatus inserts on the
Correct Answer
greater tubercle of humerus
greater tubercleExplanation
The supraspinatus muscle attaches to the greater tubercle of the humerus. The greater tubercle is a bony prominence located on the lateral side of the humerus, near the top of the upper arm bone. This attachment allows the supraspinatus muscle to help stabilize and move the shoulder joint. By inserting on the greater tubercle, the supraspinatus muscle can exert force and contribute to movements such as abduction and rotation of the arm.Rate this question:
- 12.
The latissimus dorsi originates on the
Correct Answer
spinous processes
crest of iliac
spinous processExplanation
The correct answer is the spinous processes, crest of iliac, and spinous process. The latissimus dorsi is a large muscle located in the back. It originates from the spinous processes of the lower six thoracic vertebrae, the lumbar vertebrae, the sacrum, and the crest of the iliac bone. The spinous processes are bony projections that stick out from the back of each vertebra, while the crest of the iliac bone is the upper edge of the hip bone. So, the latissimus dorsi muscle originates from these specific anatomical landmarks.Rate this question:
- 13.
Which of these originates on the acromion process?
- A.
Teres Major
- B.
Deltoid Middle
- C.
Coracobrachialis
- D.
Pectoralis Major Lower
Correct Answer
B. Deltoid MiddleExplanation
The acromion process is a bony projection on the scapula (shoulder blade). The deltoid muscle is a large muscle that covers the shoulder joint and is responsible for arm abduction and flexion. The middle part of the deltoid muscle originates from the acromion process, along with the clavicle and the spine of the scapula. Therefore, the correct answer is Deltoid Middle.Rate this question:
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- 14.
The latissimus dorsi inserts on the
Correct Answer
intertubercular grooveExplanation
The latissimus dorsi is a large muscle located on the back. It originates from the lower spine and iliac crest and inserts on the humerus. The intertubercular groove, also known as the bicipital groove, is a groove on the humerus where the tendon of the latissimus dorsi inserts. This groove is located on the anterior side of the humerus, between the greater and lesser tubercles. The latissimus dorsi plays a role in shoulder adduction, extension, and medial rotation, and its insertion on the intertubercular groove allows it to perform these actions effectively.Rate this question:
- 15.
The teres major originates on
Correct Answer
lateral border of scapula
interior angle
lateral borderExplanation
The teres major muscle originates from the lateral border of the scapula, specifically from the region known as the lateral border and the interior angle. This means that the muscle begins its attachment at the outer edge of the scapula and extends towards the inner angle of the scapula.Rate this question:
- 16.
Which of these muscles is responsible for internal rotation
- A.
Infraspinatus
- B.
Coracobrachialis
- C.
Teres Minor
- D.
Teres Major
Correct Answer
D. Teres MajorExplanation
The teres major muscle is responsible for internal rotation. It is a large muscle located on the back of the upper arm and connects the scapula to the humerus bone. When it contracts, it rotates the arm inwards towards the body. The other muscles listed, such as the infraspinatus, coracobrachialis, and teres minor, are not primarily responsible for internal rotation.Rate this question:
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- 17.
The teres major inserts on the
Correct Answer
intertubercular grooveExplanation
The teres major muscle is a large muscle located in the upper arm. It originates from the lower part of the scapula and inserts on the intertubercular groove of the humerus. The intertubercular groove is a shallow groove located on the anterior surface of the humerus, between the greater and lesser tubercles. This groove serves as a point of attachment for various muscles and tendons, including the teres major. When the teres major contracts, it helps to extend, adduct, and internally rotate the arm at the shoulder joint. Therefore, the correct answer is intertubercular groove.Rate this question:
- 18.
The infraspinatus inserts on the
Correct Answer
greater tubercleExplanation
The infraspinatus muscle is one of the four muscles that make up the rotator cuff in the shoulder. It originates from the infraspinous fossa of the scapula and inserts on the greater tubercle of the humerus. The greater tubercle is a bony prominence on the lateral side of the humerus, just below the head of the bone. The insertion of the infraspinatus muscle on the greater tubercle allows it to play a role in the external rotation and stabilization of the shoulder joint.Rate this question:
- 19.
The infraspinatus originates on the
Correct Answer
infraspinous fossaExplanation
The infraspinatus muscle originates on the infraspinous fossa. The infraspinous fossa is a depression located on the posterior aspect of the scapula (shoulder blade). It is specifically located below the spine of the scapula. The infraspinatus muscle plays a crucial role in the movement and stabilization of the shoulder joint. It is responsible for the external rotation of the arm and helps in the abduction of the arm.Rate this question:
- 20.
The teres minor originates on the
Correct Answer
lateral border of scapula
lateral borderExplanation
The teres minor muscle originates from the lateral border of the scapula. This means that it starts from the side of the scapula, specifically the border that is on the outer side of the shoulder blade. The lateral border of the scapula is an important attachment point for the teres minor muscle, which plays a role in shoulder movement and stability.Rate this question:
- 21.
The teres minor inserts on the
Correct Answer
greater tubercle of humerus
greater tubercleExplanation
The teres minor muscle inserts on the greater tubercle of the humerus. The greater tubercle is a bony prominence located on the lateral side of the humerus. The teres minor is one of the four muscles that make up the rotator cuff in the shoulder. It originates from the lateral border of the scapula and attaches to the greater tubercle of the humerus. Its main function is to assist in the rotation of the arm and stabilization of the shoulder joint.Rate this question:
- 22.
Which of these muscles is responsible for extension?
- A.
Latissimus Dorsi
- B.
Supraspinatus
- C.
Pectoralis Major Upper
- D.
Deltoid Posterior
Correct Answer
A. Latissimus DorsiExplanation
The Latissimus Dorsi muscle is responsible for extension. This muscle is located in the back and is one of the largest muscles in the upper body. It originates from the lower spine and attaches to the upper arm bone. When it contracts, it pulls the arm down and back, allowing for extension of the shoulder joint. This muscle is commonly targeted in exercises like pull-ups and rows to strengthen and develop the back muscles.Rate this question:
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- 23.
Which of these insert on the lesser tubercle of the humerus
- A.
Infraspinatus
- B.
Supraspinatus
- C.
Subscapularis
Correct Answer
C. SubscapularisExplanation
The correct answer is Subscapularis. The subscapularis muscle inserts on the lesser tubercle of the humerus. It is one of the four muscles that make up the rotator cuff in the shoulder. The other two muscles mentioned, infraspinatus and supraspinatus, insert on different parts of the humerus and are not directly related to the lesser tubercle.Rate this question:
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- 24.
The pectoralis major lower fibres originate on the
Correct Answer
anterior surface of the first six ribs
first six ribs
ribsExplanation
The pectoralis major lower fibers originate on the anterior surface of the first six ribs. This means that the lower fibers of the pectoralis major muscle start from the front side of the first six ribs. The term "anterior surface" refers to the front side of the ribs. The first six ribs are specifically mentioned as the point of origin for these fibers. Therefore, the correct answer includes all three options: "anterior surface of the first six ribs," "first six ribs," and "ribs."Rate this question:
- 25.
Which of these is responsible for horizontal adduction
- A.
Teres Minor
- B.
Deltoid Anterior
- C.
Subscapularis
- D.
Deltoid Middle
Correct Answer
B. Deltoid AnteriorExplanation
Deltoid Anterior is responsible for horizontal adduction. This muscle is located at the front of the shoulder and plays a significant role in moving the arm across the body. When the deltoid anterior contracts, it pulls the arm inward, causing horizontal adduction. The other muscles listed, Teres Minor, Subscapularis, and Deltoid Middle, do not have the primary function of horizontal adduction.Rate this question:
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- 26.
The coracobrachialis inserts on the
Correct Answer
medial border of humeral shaft
humeral shaft
middle of humerus
medial humerus
humerusExplanation
The coracobrachialis muscle inserts on the medial border of the humeral shaft. This means that the muscle attaches to the inner side of the upper arm bone (humerus) along its shaft. The other options, such as humeral shaft, middle of humerus, medial humerus, and humerus, are all incorrect as they do not specify the exact location of insertion on the humerus.Rate this question:
- 27.
Which of these originate on the lateral border of the scapula
- A.
Teres Minor
- B.
Teres Major
- C.
Supraspinatus
Correct Answer(s)
A. Teres Minor
B. Teres MajorExplanation
The teres minor and teres major muscles both originate on the lateral border of the scapula. The teres minor is a small muscle that attaches to the upper part of the lateral border, while the teres major is a larger muscle that attaches to the lower part of the lateral border. The supraspinatus muscle, on the other hand, originates on the supraspinous fossa of the scapula, which is located above the spine of the scapula. Therefore, the correct answer is Teres Minor and Teres Major.Rate this question:
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- 28.
The supraspinatus originates on
Correct Answer(s)
supraspinous fossaExplanation
The supraspinatus muscle originates on the supraspinous fossa, which is a shallow depression on the posterior aspect of the scapula. This fossa is located above the spine of the scapula and provides attachment for the supraspinatus muscle. The supraspinatus muscle plays an important role in shoulder abduction and stabilization of the shoulder joint. Its origin on the supraspinous fossa allows it to generate the necessary force and movement for these functions.Rate this question:
- 29.
Which of these insert on the greater tubercle of the humerus?
- A.
Infraspinatus
- B.
Supraspinatus
- C.
Teres Major
Correct Answer(s)
A. Infraspinatus
B. SupraspinatusExplanation
The Infraspinatus and Supraspinatus muscles both insert on the greater tubercle of the humerus. The Infraspinatus muscle originates from the infraspinous fossa of the scapula and inserts on the posterior part of the greater tubercle. The Supraspinatus muscle originates from the supraspinous fossa of the scapula and inserts on the superior part of the greater tubercle. The Teres Major muscle, on the other hand, inserts on the medial lip of the intertubercular sulcus of the humerus.Rate this question:
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- 30.
Which of these inserts on the intertubercular groove?
- A.
Teres Major
- B.
Teres Minor
- C.
Infraspinatus
Correct Answer
A. Teres MajorExplanation
The teres major muscle inserts on the intertubercular groove.Rate this question:
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- 31.
The pectoralis major and pectoralis minor insert on the
Correct Answer
intertubercular groove
humeral intertubercular grooveExplanation
The pectoralis major and pectoralis minor muscles both insert on the intertubercular groove of the humerus. The intertubercular groove is a shallow groove located between the greater and lesser tubercles of the humerus. These muscles play a role in movements of the shoulder joint, such as flexion and adduction. By inserting on the intertubercular groove, they are able to exert force and control the movement of the humerus during these actions.Rate this question:
- 32.
Which of these inserts on the lesser tubercle?
- A.
Subscapularis
- B.
Teres Minor
- C.
Teres Major
- D.
Latissimus Dorsi
Correct Answer
A. SubscapularisExplanation
The subscapularis muscle inserts on the lesser tubercle. The lesser tubercle is a bony prominence on the anterior aspect of the humerus bone. The subscapularis muscle is located on the anterior side of the shoulder joint and is one of the four muscles that make up the rotator cuff. Its main function is to internally rotate and stabilize the shoulder joint.Rate this question:
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