Head and Neck Anatomy MCQs | MCQ Quiz | OmpathStudy Kenya

Question 1

Regarding the superior orbital fissure, which is INCORRECT?

Accepted Answer

Its common tendinous ring binds the SOF content of nerves and muscles to the contents of the optic canal — The common tendinous ring (annulus of Zinn) does not bind the superior orbital fissure contents to the optic canal contents. The tendinous ring is located around the optic canal and medial part of the superior orbital fissure, serving as the origin for the four rectus muscles.

Question 2

With regards to eye movement, which is INCORRECT?

Accepted Answer

The inferior oblique turns the eye down and out — The inferior oblique turns the eye UP and OUT, not down and out. The inferior oblique elevates, abducts, and extorts the eye.

Question 3

Which is INCORRECT?

Accepted Answer

In a 4th cranial nerve paralysis, the affected eye lies slightly inturned — In 4th cranial nerve (trochlear) paralysis, the affected eye is typically slightly upturned and outturned, not inturned. The superior oblique muscle is paralyzed, leading to loss of its actions (depression, intorsion, and slight abduction).

Question 4

With regards to the retina, which is CORRECT?

Accepted Answer

The optic disc and fovea are of similar size — The optic disc and fovea are indeed of similar size (approximately 1.5mm in diameter). The fovea contains a high concentration of cones, not rods, and has no blood vessels.

Question 5

The nasal septum consists of:

Accepted Answer

The vomer and ethmoid bones — The nasal septum is primarily formed by the vomer (posterior-inferior part) and the perpendicular plate of the ethmoid bone (superior part). The septal cartilage forms the anterior part.

Question 6

The ophthalmic artery:

Accepted Answer

Forms an anastomosis between ECA and ICA — The ophthalmic artery forms important anastomoses between the external carotid artery (ECA) and internal carotid artery (ICA) systems through its terminal branches. It is a branch of the ICA and enters through the optic canal.

Question 7

Regarding the carotid sheath:

Accepted Answer

The sympathetic trunk lies outside the sheath — The sympathetic trunk lies outside the carotid sheath, posterior to it. The carotid sheath contains the common carotid artery (medially), internal jugular vein (laterally), and vagus nerve (posteriorly).

Question 8

The contents of the jugular foramen include:

Accepted Answer

Vagus nerve — The jugular foramen contains the glossopharyngeal nerve (IX), vagus nerve (X), and accessory nerve (XI). The hypoglossal nerve passes through the hypoglossal canal.

Question 9

The sensory innervation of the auricle of the ear includes:

Accepted Answer

All of the above — The auricle receives sensory innervation from multiple sources: auriculotemporal nerve, great auricular nerve, facial nerve, and the auricular branch of the vagus nerve.

Question 10

Regarding the abducent nerve (CN VI):

Accepted Answer

Enters the orbit through the superior orbital fissure — The abducent nerve enters the orbit through the superior orbital fissure within the tendinous ring. The nucleus lies in the pons and it supplies the lateral rectus muscle.

Question 11

Regarding the face, which is INCORRECT?

Accepted Answer

The eyelid muscles are completely supplied by CN VII — The eyelid muscles are not completely supplied by CN VII. The levator palpebrae superioris is supplied by CN III (oculomotor nerve), while the orbicularis oculi is supplied by CN VII.

Question 12

Regarding the trigeminal nerve:

Accepted Answer

The mandibular nerve has three cutaneous branches — The mandibular nerve has three main cutaneous branches: auriculotemporal, buccal, and mental nerves. Supratrochlear and infratrochlear nerves are branches of the ophthalmic division (V1).

Question 13

Which structure does NOT pass through the parotid gland?

Accepted Answer

Internal jugular vein — The internal jugular vein does not pass through the parotid gland. It lies medial to the gland within the carotid sheath.

Question 14

Which structure is NOT in the carotid sheath?

Accepted Answer

External jugular vein — The external jugular vein is NOT in the carotid sheath. It runs superficially in the neck, crossing the sternocleidomastoid muscle.

Question 15

Which is an intrinsic muscle of the tongue?

Accepted Answer

Superior longitudinal muscle — The superior longitudinal muscle is an intrinsic muscle of the tongue. The others (genioglossus, hyoglossus, styloglossus, and palatoglossus) are extrinsic muscles.

Question 16

Which muscle abducts the vocal cords?

Accepted Answer

Posterior cricoarytenoid — The posterior cricoarytenoid is the only muscle that abducts (opens) the vocal cords.

Question 17

Which laryngeal muscle is NOT supplied by the recurrent laryngeal nerve?

Accepted Answer

Cricothyroid — The cricothyroid muscle is supplied by the external branch of the superior laryngeal nerve.

Question 18

The internal laryngeal nerve supplies:

Accepted Answer

Sensation above the vocal folds — The internal laryngeal nerve provides sensory innervation to the larynx above the vocal folds.

Question 19

Which nerve does NOT supply skin to the upper eyelid?

Accepted Answer

Infraorbital — The infraorbital nerve supplies the lower eyelid, lateral nose, and upper lip, not the upper eyelid.

Question 20

Which extraocular muscle does NOT arise from the tendinous ring of the orbit?

Accepted Answer

Superior oblique — The superior oblique muscle arises from the sphenoid bone above and medial to the optic foramen, not the common tendinous ring.

Question 21

Which structure passes through the tendinous ring of the orbit?

Accepted Answer

Ophthalmic artery — The ophthalmic artery passes through the tendinous ring along with the optic nerve in the optic canal.

Question 22

Which bone is not part of the medial wall of the orbit?

Accepted Answer

Palatine bone — The palatine bone contributes to the orbital floor, not the medial wall.

Question 23

Which muscle helps to open the jaw?

Accepted Answer

Lateral pterygoid — The lateral pterygoid muscle helps to open the jaw. The medial pterygoid, masseter, and temporalis close the jaw.

Question 24

Regarding the vertebral column:

Accepted Answer

The cruciform ligament holds the dens in place — The cruciform ligament holds the dens of C2 in place against the anterior arch of C1.

Question 25

The middle meningeal artery is a branch of the:

Accepted Answer

Maxillary artery — The middle meningeal artery is a branch of the first part of the maxillary artery.

Question 26

The hyoid bone is at what level?

Accepted Answer

C3 vertebra — The hyoid bone is located at the level of the C3 vertebra. ## Section 2: Face, Blood Supply, Nerves

Question 27

The parotid gland:

Accepted Answer

Is the largest of the major salivary glands — The parotid gland is the largest salivary gland and is primarily serous in nature.

Question 28

Cutaneous sensation to the upper lip is supplied by the:

Accepted Answer

Infraorbital nerve — The infraorbital nerve (V2) supplies the upper lip, lower eyelid, and lateral nose.

Head and Neck Anatomy MCQs | MCQ Quiz | OmpathStudy Kenya

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