PterygopALATine And IT Fossa-lecture
- 1.
Which of the following is not considered one of the contents of the PT Fossa?
- A.
Pterygopalatine Ganglion
- B.
Maxillary Artery
- C.
V-2
- D.
Otic Ganglion
Correct Answer
D. Otic GanglionExplanation
The Otic Ganglion is in the IT FossaRate this question:
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- 2.
A patient comes to your ER with a deep laceration on the side of his face. You notice that it is in the area of the IT Fossa, which one of the following structures would not be affected?
- A.
Sphenomandibular Ligament
- B.
Branches of CN V, VII & IX
- C.
Otic Ganglion
- D.
Pterygoid Venous Plexus
- E.
Ciliary Ganglion
- F.
Inferior Portion of Temporalis, Medial and Lateral Pterygoids
Correct Answer
E. Ciliary GanglionExplanation
Contents:
• Inferior portion of temporalis, medial & lateral pterygoids (muscles of mastication in IT fossa)
• Sphenomandibular ligament (looks like a nerve) – medial to TMJ
• Maxillary a & branches
• Pterygoid venous plexus
• V, VII & IX branches
• Otic ganglion
The Ciliary Ganglion is between CN III and Lateral Rectus Muscle, not in the IT FossaRate this question:
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- 3.
The Maxillary Artery enters the PT Fossa from the IT Fossa from which of the following?
- A.
Pterygopalatine Fissure
- B.
Foramen Ovale
- C.
Sphenopalatine Foramen
- D.
Inferior Orbital Fissure
Correct Answer
A. Pterygopalatine FissureExplanation
The Maxillary Artery enters the Pterygopalatine Fossa from the Pterygopalatine Fissure. The Pterygopalatine Fissure is a narrow slit-like opening located between the sphenoid and maxilla bones. It is an important anatomical structure through which several structures pass, including the maxillary artery. The maxillary artery is one of the main branches of the external carotid artery and supplies blood to the structures of the face, including the maxillary teeth, nasal cavity, and palate. Therefore, the correct answer is the Pterygopalatine Fissure.Rate this question:
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- 4.
The Ophthalmic Vein drains into the Pterygoid Venous Plexus through which of the following?
- A.
Pterygopalatine Fissure
- B.
Foramen Ovale
- C.
Sphenopalatine Foramen
- D.
Inferior Orbital Fissure
Correct Answer
D. Inferior Orbital FissureExplanation
The Ophthalmic Vein drains into the Pterygoid Venous Plexus through the Inferior Orbital Fissure. The Pterygoid Venous Plexus is a network of veins located in the pterygopalatine fossa, which is a space in the skull. The Inferior Orbital Fissure is a small opening located in the orbital wall, and it provides a pathway for the Ophthalmic Vein to drain into the Pterygoid Venous Plexus.Rate this question:
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- 5.
The Inferior Alveolar Nerve enters the Oral Cavity from the IT Fossa through which of the following?
- A.
Mandibular Foramen
- B.
Mental Foramen
- C.
Sphenopalatine Foramen
- D.
Pterygopalatine Fissure
Correct Answer
A. Mandibular ForamenExplanation
This is where it enters the mandable.Rate this question:
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- 6.
Which of the following are not considered one of the muslces of mastication?
- A.
Temporalis
- B.
Masseter
- C.
Buccinator
- D.
Medial Pterygoid
- E.
Lateral Pterygoid
Correct Answer
C. BuccinatorExplanation
Muscles of Mastication (all innervated by V3)
• Temporalis
• Masseter
• Medial pterygoid
• Lateral pterygoidRate this question:
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- 7.
A patient comes into your office complaining of loss of motor function during mastication. You believe the loss of motor function is because of a nerve block. Which nerve would most likely be affected?
- A.
V-1
- B.
V-2
- C.
V-3
- D.
VII
Correct Answer
C. V-3Explanation
Motor function of the muscles of mastication are in V-3 Mandibular NerveRate this question:
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- 8.
The preganglionic and postgoanglionic parasympathetic fibers innvervating the Parotid Gland are respectively the:
- A.
Lesser Petrosal N. and Greater Temporal N.
- B.
Greater Petrosal N. and Auriculotemporal N.
- C.
Lesser Petrosal N. and Auriculotemporal N.
- D.
Greater Petrosal N. and Greater Temporal N.
Correct Answer
C. Lesser Petrosal N. and Auriculotemporal N.Explanation
The pathway is as follows:
CN IX > Lesser Petrosal N. > Otic Ganglion > Auriculotemporal N. (Branch of V-3) > Parotid GlandRate this question:
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- 9.
In the temporomandibular joint, the upper joint cavity is involved in which of the followin?
- A.
Retraction Only
- B.
Protrusion and Elevation
- C.
Elevation and Retraction
- D.
Protrusion and Retraction
Correct Answer
D. Protrusion and RetractionExplanation
• Upper joint cavity: protrusion & retraction
• Lower joint cavity: elevation & retractionRate this question:
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- 10.
The temporomandibular joint has a unique feature for being a synovial joint. Which of the following is the unique feature?
- A.
Bony articular surfaces covered by fibrocartilage
- B.
Bony articular surfaces covered by elastic cartilage
- C.
Bony articular surfaces covered by hyaline cartilage
- D.
Bony articular surfaces covered by intervertebral discs
Correct Answer
A. Bony articular surfaces covered by fibrocartilageExplanation
The correct answer is bony articular surfaces covered by fibrocartilage. The temporomandibular joint is unique because it is the only synovial joint in the body that has bony articular surfaces covered by fibrocartilage. This fibrocartilage helps to absorb shock and provides a smooth surface for the bones to glide against each other during jaw movement.Rate this question:
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- 11.
Which of the following nerves is not a branchiomotor nerve branch of the Mandibular Nerve CN V-3?
- A.
Nerve to Medial Pterygoid
- B.
Nerve to Lateral Pterygoid
- C.
Buccal Nerve
- D.
Deep Temporal Nerve
- E.
Masseteric Nerve
Correct Answer
C. Buccal NerveExplanation
Although the Buccal Nerve is a branch of V-3, it is a sensory nerve of the cheek.Rate this question:
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- 12.
Which correctly shows the parasympathetic nerve path to the Lacrimal Gland?
- A.
CN V > Tigeminal Ganglia > V-2 (Zygomatic Branch) > Lacrimal Nerve (V-1) > Lacrimal Gland
- B.
CN V > V-2 > Pterygopalatine Ganglia > Lacrimal Nerve (V-1) > Lacrimal Gland
- C.
CN VII > Greater Petrosal Nerve > Trigeminal Ganglia > V-2 (Zygomatic Branch)> Lacrimal Nerve (V-1) > Lacrimal Gland
- D.
CN VII > Greater Petrosal Nerve > Pterygopalatine Ganglia > V-2 (Zygomatic Branch) > Lacrimal Nerve (V-1) > Lacrimal Gland
Correct Answer
D. CN VII > Greater Petrosal Nerve > Pterygopalatine Ganglia > V-2 (Zygomatic Branch) > Lacrimal Nerve (V-1) > Lacrimal GlandExplanation
Remember, the parasympathetic innervation of the Lacrimal Gland is a little complicated since it uses branch of different cranial nerves. Know this path.Rate this question:
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- 13.
A patient presents to you with a lesion in the Greater Petrosal Nerves. Which of the following would you expect to be functioning even with the lesion?
- A.
Submandibular Mucous Gland
- B.
Lacrimal Gland
- C.
Mucous Glands in Nasal Cavity
- D.
Mucous and Salivary Glands in hard and soft palate
Correct Answer
A. Submandibular Mucous GlandExplanation
The Greater Petrosal Nerve is the preganglionic parasympathetic fiber for:
1. Lacrimal Gland
2. Mucous Glands in Nasal Cavity
3. Mucous and Salivary Glands in hard and soft palate
The Chorda Tympani is the preganglionic parasympathetic fiber of the submandibular mucous glandsRate this question:
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Current Version
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Mar 20, 2023Quiz Edited by
ProProfs Editorial Team -
Sep 27, 2012Quiz Created by
Sammit85