Cranial nerves

Question 1

What types are cranial nerves?

Answer 1

Sensory and motor peripheral neurons

Question 2

What are some cranial nerves carry only sensory information?

Answer 2

serve the sense of olfaction, vision, and hearing
olfactory (I), optic (II), and vestibulocochlear nerves (VIII)

Question 3

What are some cranial nerves carry only motor information?

Answer 3

those that innervate the neck muscles and those muscles that move the eyes

Question 4

What are mixed nerves?

Answer 4

These nerves carry sensory information from the face, mouth, and other structures to the brain while also carrying signals to the head and neck muscles

Question 5

mnemonic to remember the first letter of the nerves

Answer 5

Oh, Once One Takes The Anatomy Final, a Very Good Vacation Sounds Heavenly!

Question 6

a common mnemonic to recall their functional designations is

Answer 6

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Question 7

Oh, Once One Takes The Anatomy Final, a Very Good Vacation Sounds Heavenly!

Answer 7

I Olfactory
II Optic: eye
III Oculomotor: eye
IV Trochlear: eye
V Trigeminal: face
VI Abducens: eye
VII Facial
VIII Vestibulocochlear: ear
IX Glossopharyngeal: tongue and pharynx
X Vagus: parasympathetic nervous system
XI Spinal accessory
XII Hypoglossal: brain

Question 8

Some Say Marry Money, But My Brother Says Big Brains Matter More”

Answer 8

S: sensory
M: motor
B: both

Question 9

olfactory epithelium

Answer 9

superior nasal cavities that is sensitive to airborne chemicals.

Question 10

olfactory bulbs

Answer 10

In cranial cavity
olfactory epithelium => olfactory bulb => olfactory tracts

Question 11

olfactory tracts

Answer 11

From the olfactory bulbs, olfactory tracts carry the signals to the cerebrum. Ultimately, signals arrive at the olfactory cortex of the temporal lobe.

Question 12

Function of optic nerves

Answer 12

carry information from the retina of the eye to the brain

Question 13

optic chiasm

Answer 13

cross-shaped junction where two nerves, retina and eye of the brain, meet just in front of the hypothalamus

Question 14

optic tracts

Question 15

optic tracts

Question 16

vestibulocochlear nerves

Answer 16

carry sensory information from the vestibule and the cochlea of the inner ear

Question 17

Oculomotor nerve (CN III)

Answer 17

Cranial nerves III,IV and VI innervate the extraocular muscles that move the eye

Question 18

trochlear nerve (IV)

Question 19

Abducens nerve (CN VI)

Question 20

trigeminal nerve (V)

Answer 20

supplies motor innervation to the chewing muscles and carries sensory from the face, oral cavities, and nasal cavities. Because of its vast sensory innervation, the trigeminal is considered the great sensory nerve of the head.

Question 21

facial nerve (VII)

Answer 21

provides motor neurons to the facial expression muscles. Its sensory neurons come from the taste buds of the tongue.

Question 22

glossopharyngeal nerve (IX)

Answer 22

carries motor neurons to the muscles of the pharynx, important to the act of swallowing. Like the facial nerve, the glossopharyngeal also carries sensory information from taste buds.

Question 23

vagus nerve (X)

Answer 23

is unusual among the cranial nerves in that it is not constrained to the head and neck. The vagus nerve provides sensory and motor innervation to many of the body’s internal organs from the neck to the abdomen.

Question 24

The _____ nerve provides sensory innervation to the face, while the _____ nerve innervates the superficial muscles of the face (facial expression muscles).

Answer 24

Trigeminal, facial

Question 25

spinal accessory nerve (XI)

Answer 25

provides motor stimulation to the trapezius and sternocleidomastoid muscles of the neck.

Question 26

hypoglossal nerve (XII)

Answer 26

is the motor nerve to the tongue. It innervates the muscles of the tongue that change the tongue’s shape as well as those that move the tongue around in the oral cavity.