Cranial Nerves and Anatomy Overview

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Questions and Answers

Which statement about the facial nerve is false?

It goes in the canal located in the temporal bone.

Its motor nucleus is in the midbrain. (correct)

It enters the internal auditory meatus.

Its smaller sensory and parasympathetic component is called intermediate nerve.

What is an incorrect statement about the corrugator supercili?

Its name means wrinkler of the eyebrows.

It is located at the lateral end of the eyebrow.

Its motor innervation comes from the trigeminal nerve. (correct)

It is responsible for horizontal wrinkles of the forehead.

Which statement about the muscles of facial expression is false?

Their only function is facial mobility. (correct)

They originate from bone or fascia.

They insert into the skin.

They are innervated by the VII cranial nerve.

What does the auditory tube connect?

Middle ear and nasopharynx. Signup and view all the answers

Which structure is part of the internal ear?

Sacculus. Signup and view all the answers

Which nerve is a branch of the mandibular nerve?

Lingual nerve Signup and view all the answers

Which type of tooth is absent during the milky dentition?

Third molar Signup and view all the answers

Which muscle is NOT classified as a muscle of the tongue?

Mylohyoid muscle Signup and view all the answers

Which of the following structures does NOT drain into the middle nasal meatus?

Sphenoid sinus Signup and view all the answers

Which layer of the eye does the iris belong to?

Vascular coat Signup and view all the answers

Which of the following is NOT a mucle of mastication?

Orbicularis oris Signup and view all the answers

Which papillae of the tongue form a V-row in front of the sulcus terminalis?

Vallate Signup and view all the answers

Which of the following is NOT a branch of the facial nerve?

Nerve to the anterior belly of digastric muscle Signup and view all the answers

Which gland is innervated by the glossopharyngeal nerve via parasympathetic fibers?

Parotid gland Signup and view all the answers

Where does the vagus nerve leave the skull?

Lateral part of jugular foramen Signup and view all the answers

What is the primary function of the hypoglossal nerve?

Motor innervation of all tongue muscles except palatoglossus Signup and view all the answers

Which structure does the infraorbital nerve travel through?

Inferior orbital fissure Signup and view all the answers

What does the pterygopalatine ganglion receive fibers from?

Greater petrosal nerve Signup and view all the answers

Which structure supplies the superior lip?

Infraorbital nerve Signup and view all the answers

What pathway is correct for the secretion of the lacrimal gland?

Superior salivatory nucleus -- greater petrosal nerve Signup and view all the answers

Which muscle is innervated by the glossopharyngeal nerve?

Stylopharyngeal muscle Signup and view all the answers

Which muscle is innervated by the oculomotor nerve?

Inferior rectus muscle Signup and view all the answers

What is the correct entry point of the ophthalmic artery into the orbit?

Superior orbital fissure Signup and view all the answers

Through which structure does the inferior ophthalmic vein leave the orbit?

Inferior orbital fissure Signup and view all the answers

Which nerve innervates the levator palpebrae muscle?

Oculomotor nerve Signup and view all the answers

Which foramen does the abducens nerve leave the skull through?

Superior orbital fissure Signup and view all the answers

Which of the following is a branch of the ophthalmic artery?

Posterior ethmoidal artery Signup and view all the answers

Which structure does NOT belong to Waldeyer's ring of lymphoid tissue?

Parotid lymph nodes Signup and view all the answers

Which muscle is classified as a levator of the pharynx?

Salpingopharyngeus muscle Signup and view all the answers

Study Notes

Cranial Nerves and Associated Structures

The oculomotor nerve (CN III) innervates the superior oblique, lateral rectus, inferior rectus, and orbicularis oculi muscles, as well as the procerus muscle.
The ophthalmic artery, a branch of the external carotid artery, enters the orbit through the superior orbital fissure and supplies the lacrimal gland. It also passes by the inferior orbital fissure.
The inferior ophthalmic vein exits the orbit via the inferior orbital fissure.
The levator palpebrae muscle is innervated by the oculomotor nerve (CN III).

Cranial nerves and the skull

The abducens nerve exits the skull through the superior orbital fissure.
The ophthalmic artery is a branch of the internal carotid artery.
The posterior ethmoidal artery is a branch of the ophthalmic artery.
The piriform recess of the pharynx contains internal branch of the superior laryngeal nerve, located in the nasopharynx.
The lymphoid Waldeyer's ring does not include parotid lymph nodes.

Muscles of the Pharynx and Tongue

The salpingopharyngeus muscle is a levator of the pharynx.
The glossopharyngeal nerve innervates the parotid gland, via parasympathetic fibers.
The vagus nerve exits the skull through the lateral part of the jugular foramen.
The hypoglossal nerve innervates all the muscles of the tongue except the palatoglossus muscle and travels through the lateral part of the jugular foramen.

Facial Nerve and Associated Structures

The infraorbital nerve passes through the inferior orbital fissure.
The pterygopalatine ganglion lies laterally to the optic nerve and receives parasympathetic fibers from the greater petrosal nerve. It receives sympathetic fibers from the external carotid artery plexus and a sensory branch from the mandibular nerve.
The correct secretory pathway for the lacrimal gland is superior salivatory nucleus - greater petrosal nerve - pterygopalatine ganglion - zygomatic nerve - lacrimal nerve.
The mandibular nerve has branches including the lingual nerve.

Teeth and Tongue

The incisors have two roots in the maxilla; premolars have three roots in the maxilla; and molars in the mandible have three roots. The third molar is frequently absent in the deciduous dentition.
The vallate papillae form a V-shaped row in front of the sulcus terminalis of the tongue.
The mylohyoid muscle does not belong to the muscles of the tongue
The orbicularis oris muscle is not a muscle of mastication.

Eye Structures

The posterior chamber of the eye is part of the fibrous coat.
The iris is part of the vascular coat.
The macula lutea is the point of best vision.

Nasal and Ear Structures

Structures that drain into the middle nasal meatus include the nasolacrimal duct and the maxillary sinuses; frontal, maxillary, and anterior ethmoidal sinuses.
The facial nerve does not include a nerve for the stapedius muscle, nor does it include the chordae tympani; the chordae tympani are a branch of the facial nerve
The auditory tube connects the tympanic cavity to the nasopharynx.

Internal Ear Anatomy

The internal ear contains the incus, concha, sacculus, tragus, stapes, and other ossicles.

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Description

Test your knowledge of cranial nerves and their associated structures with this comprehensive quiz. Explore the functions and pathways of various cranial nerves, as well as their anatomical relationships. Perfect for students of anatomy and neuroscience.