Anatomy - Study Questions - The Cranial Nerves

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olfactory

What is the first cranial nerve?

optic

What is the second cranial nerve?

oculomotor

What is the third cranial nerve?

trochlear

What is the fourth cranial nerve?

trigeminal

What is the fifth cranial nerve?

abducens

What is the sixth cranial nerve?

facial

What is the seventh cranial nerve?

vestibulocochlear

What is the eighth cranial nerve?

glossopharyngeal

What is the ninth cranial nerve?

vagus

What is the tenth cranial nerve?

accessory

What is the eleventh cranial nerve?

hypoglossal

What is the twelvth cranial nerve?

I. olfactory

Which nerve has fibers that run through the cribriform plate of the ethmoid bone?

I. olfactory; II. optic

Which two cranial nerves are purely sensory?

VIII. vestibulocochlear

Which cranial nerve is primarily sensory?

XI. accessory; XII. hypoglossal

Which cranial nerves have mixed function but are primarily motor?

V. trigeminal; VII. facial; IX. glossopharygeal, X. vagus

Which cranial nerves have mixed function?

III. oculomotor; IV. trochlear

Which cranial nerves have primarily motor function?

VI. abducens

Which cranial nerve carries motor fibers to the lateral rectus muscle of the eye?

I. olfactory

Which cranial nerve carries afferent impulses associated with the sense of smell?

II. optic

Which cranial nerve carries afferent impulses associated with vision?

IV. trochlear

Which cranial nerve provides somatic motor fibers to the superior oblique muscle of the eye?

V. trigeminal

Which cranial nerve is the major sensory nerve of the face?

V. trigeminal

Which cranial nerve conducts sensory impulses from the skin of the face and anterior scalp?

V. trigeminal

Which cranial nerve conducts sensory impulses from the mucosae of the mouth and nose and from the surfaces of the eyes?

V. trigeminal

Which cranial nerve contains motor fibers that innervate muscles of mastication and the muscles of the floor of the mouth?

XII. hypoglossal

Which cranial nerve carries somatic motor fibers to the muscles of the tongue?

XI. accessory

Which cranial nerve provides somatic motor fibers to the sternocleidomastoid and trapezius muscles?

XI. accessory

Which cranial nerve provides somatic motor fibers to the muscles of the soft palate, pharynx and larynx?

X. vagus

Which cranial nerve has mixed fibers that carry somatic motor impulses to the pharynx and larynx and sensory fibers from the same structures?

X. vagus

Which cranial nerve has a very large portion composed of parasympathetic motor fibers, which supply the heart and smooth muscles of the abdominal visceral organs?

XII. hypoglossal

Which cranial nerve has fibers that arise from the medulla and exit via the hypoglossal canal to the tongue?

XII. hypoglossal

When a person is asked to protude and retract their tongue, which cranial nerve is being tested?

XI. accessory

Which cranial nerve has fibers that arise from the medulla and superior aspects of the spinal cord, and travel through the jugular foramen to reach muscles of the neck and back?

XI. accessory

When the sternocleidomastoid and trapezius muscles are checked for strength, what cranial nerve is being tested?

IX. glossopharyngeal; X. vagus

When the muscles of the throat and mouth are being tested for function, which two cranial nerves are being checked?

X. vagus

Which cranial nerve has fibers that emerge from the medulla, pass through the jugular foramen, and descend through the neck region into the thorax and abdomen?

IX. glossopharyngeal

Which cranial nerve has fibers that emerge from the medulla and leave the skull via the jugular foramen to run to the throat?

VIII. vestibulocochlear

Which cranial nerve has fibers that run from the internal-ear equilibrium and hearing apparatus, are housed in the temporal bone, and run through the internal acoustic meatus to enter the pons?

VII. facial

Which cranial nerve has fibers which leave the pons, travel through the temporal bone via the internal acoustic meatus, and exit via the stylomastoid foramen to reach the face?

IX. glossopharyngeal

Which nerve has somatic motor fibers which serve the pharygeal muscles and parasympathetic motor fibers which serve the salivary glands?

IX. glossopharyngeal

Which cranial nerve has sensory fibers which carry impulses from the pharynx, tonsils, posterior tongue (taste buds) and pressure receptors of the carotid artery?

IX. glossopharyngeal; X. vagus

When a tongue depressor is used to check the position of the uvula, or when gag and swallow reflexes are checked, which cranial nerves are being tested?

VIII. vestibulocochlear

Which cranial nerve is tested when hearing tests are conducted using air and bone conduction?

VII. facial

Which cranial nerve is tested when the tongue is tested for its ability to taste sweet, salty, sour and bitter substances?

VII. facial

Which cranial nerve is tested when facial symmetry is checked?

VII. facial

Which cranial nerve carries sensory fibers from taste receptors of the anterior portion of the tongue?

VII. facial

Which cranial nerve supplies somatic motor fibers to muscles of facial expression, and parasympathetic motor fibers to lacrimal and salivary glands?

VIII. vestibulocochlear

Which cranial nerve transmits impulses associated with the sense of equilibrium and hearing?

olfactory; optic; oculomotor; trochlear; trigeminal; abducens; facial; vestibulocochlear; glossopharygeal; vagus; accessory; hypoglossal

Name the twelve cranial nerves.

I. olfactory

Which cranial nerve is being tested when a person is asked to sniff and identify aromatic substances?

II. optic

Which cranial nerve is being tested when vision and visual field are determined by using an eye chart?

III. oculomotor; IV. trochlear, VI. abducens

Which three cranial nerves are being tested when the pupils are examined for size, shape and equality?

III. oculomotor; IV. trochlear, VI. abducens

Which three cranial nerves are being tested when a subject is asked to follow an object with his eyes?

IV. trochlear

Which cranial nerve has fibers which emerge from the midbrain and exit the skull via the superior orbital fissure to run to the eye?

VI. abducens

Which cranial nerve has fibers which leave the inferior region of the pons and exit the skull via the superior orbital fissure to run to the eye?

III. oculomotor

Which cranial nerve has fibers that emerge from the dorsal midbrain and exit the skull via the superior orbital fissure to enter the orbit?

V. trigeminal

When a subject is tested for sensations of pain, touch, and temperature, which cranial nerve is being tested?

V. trigeminal

Which cranial nerve is being tested when a subject is asked to clench their teeth, open their mouth against resistance, or move the jaw from side to side?

V. trigeminal

Which cranial nerve is being tested when the corneal reflex is tested with a wisp of cotton?

V. trigeminal

Which cranial nerve has fibers which emerge from the pons, form three divisions, and then exit separately from the skull?

mandibular, maxillary, and opthalmic

What are the three divisions of the trigeminal nerve?

II. optic

Which cranial nerve has fibers which arise from the retina of the eye and pass through the optic canal?

III. oculomotor

Which cranial nerve controls the muscles which direct the eyeball and eyelid, as well as the iris and smooth muscles which control lens shape?

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