Cranial Nerves and Functions

What cranial nerve is responsible for the sense of smell?

What cranial nerve is responsible for the sense of smell?

Cranial Nerve I (Olfactory)

What is the sensory function of CN II?

Vision

Which cranial nerve moves the eye and innervates four eye muscles?

Cranial Nerve III (Oculomotor)

What is the function of the levator palpebrae muscle?

It helps open the eyelid.

Which cranial nerve innervates the lateral rectus muscle?

Cranial Nerve VI (Abducens)

What is the mnemonic to remember cranial nerve innervation for eye muscles?

LR6SO4 (Lateral rectus CN 6, Superior oblique CN 4)

Which cranial nerve is the smallest?

Cranial Nerve IV (Trochlear)

What is the somatic motor function of CN V?

Mastication (chewing)

What are the three sections of the trigeminal nerve?

Ophthalmic, maxillary, and mandibular.

What is the main function of CN VII (Facial Nerve)?

It is the chief somatic motor nerve to the facial muscles.

Which cranial nerve sends taste information from the anterior 2/3 of the tongue?

Cranial Nerve VII (Facial)

What are the two components of CN VIII (Vestibulocochlear Nerve)?

Vestibular and cochlear nerves.

What is the primary function of the cochlear nerve?

Hearing.

Which cranial nerve is responsible for taste and swallowing in the posterior 1/3 of the tongue?

Cranial Nerve IX (Glossopharyngeal)

What is the longest cranial nerve?

Cranial Nerve X (Vagus)

What does the vagus nerve innervate outside the head or neck?

Thoracic and abdominal viscera.

What is the function of CN XI (Accessory Nerve)?

Only motor; innervates upper trapezius and sternocleidomastoid muscles.

Which cranial nerve is responsible for tongue motion?

Cranial Nerve XII (Hypoglossal)

What type of nerve is cranial nerve IX?

Mixed nerve (sensory and motor functions).

Which cranial nerve is primarily responsible for facial movement?

Cranial Nerve VII (Facial Nerve).

What is the primary sensory function of CN X?

Taste from the epiglottis.

Which cranial nerve has purely motor functions related to the eye muscles?

Cranial Nerve IV (Trochlear) and Cranial Nerve VI (Abducens).

What muscle does the glossopharyngeal nerve help with?

Swallowing.

What cranial nerve provides motor function for vocalization?

Cranial Nerve X (Vagus).

What muscle group does the accessory nerve innervate?

Upper trapezius and sternocleidomastoid muscles.

What is the role of CN XII during speech?

Facilitates tongue motion.

Which cranial nerve is involved in balance and equilibrium?

Vestibular component of CN VIII (Vestibulocochlear).

What cranial nerve is responsible for innervating the constrictor muscles of the iris?

Cranial Nerve III (Oculomotor).

Which cranial nerves are primarily involved in eye movement?

Cranial Nerve III (Oculomotor), Cranial Nerve IV (Trochlear), and Cranial Nerve VI (Abducens).

What type of functions does CN VII include?

Mixed nerve functions (motor and sensory).

What anatomical landmark is associated with the vagus nerve?

Innervates various organs in the thoracic and abdominal cavities.