A & P 2 - Class 10 - CN VIII, X, XI, Cervical and Lumbar Plexuses Flashcards

1
Q

CN VIII name

A

Vestibulocochlear nerve

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2
Q

what does vestibulocochlear mean

A

small cavity; spiral snail-like; ear

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3
Q

CN VIII: sensory, motor or mixed?

A

mixed but MAINLY SENSORY

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4
Q

vestibulocochlear nerve: sensory: function?

A

equilibrium and hearing (judy says equilibrium is motor. book and notes say equilibrium is sensory.)

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5
Q

CN X name

A

vagus nerve

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6
Q

what does vagus mean

A

wandering; vagrant

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7
Q

CN X: sensory, motor mixed?

A

mixed

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8
Q

CN X: components/innervates?

A

from pharynx, larynx, thoracic to abdominal viscera

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9
Q

Vagus nerve: sensory: function?

A

taste, touch, pain, temperature; monitoring blood pressure, monitory carbon dioxide in blood; sensations from visceral organs in thorax and abdomen

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10
Q

CN X: mixed fibers innervate parasympathetic fibers to ALL organs except the ____________ ___________.

A

adrenal glands

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11
Q

CN VIII: components/innervates?

A

inner ear

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12
Q

how many branches does the vestibulocochlear nerve have?

A

2; vestibular (equilibrium) and cochlear (hearing)

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13
Q

CN XI name

A

accessory nerve

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14
Q

how does CN XI differ from all other CNs?

A

it originates from both the brain stem and the spinal cord

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15
Q

accessory nerve mean?

A

assisting

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16
Q

CN XI: cranial root: motor, sensory, mixed?

A

motor

17
Q

CN XI: spinal root: motor, sensory, mixed?

A

mixed but MAINLY MOTOR

18
Q

accessory nerve: spinal root: motor to what muscles?

A

trapezius and SCM

19
Q

accessory nerve: cranial root: serves what function?

A

rapidly joins the vagus nerve and serves the same function as other vagal nerve fibers

20
Q

the accessory nerve exits the cranium through what foramen?

A

jugular

21
Q

ventral root (anterior) =

A

motor - efferent

22
Q

dorsal root (posterior) =

A

sensory - afferent

23
Q

dorsal root ganglion =

A

cell bodiesd of sensory neurons

24
Q

after exiting the vertebral column the roots merge to form a ________ _________ __________.

A

MIXED SPINAL NERVE.

25
Q

very shortly after exiting the vertebral column, the mixed spinal nerve forms several branches, each of which is called a ________.

A

ramus.

26
Q

ramus = branch; all are __________ nerves.

A

mixed

27
Q

what is the posterior branch of the ramus?

A

dorsal ramus

28
Q

what is the anterior branch of the ramus?

A

ventral ramus

29
Q

do dorsal rami join together to form plexuses?

A

no; only ventral rami

30
Q

some of the branches braid together in the ventral rami and form a nerve ________.

A

plexus; NOT ALL DO.

31
Q

ONLY _______ rami join together to form plexuses.

A

ventral (anterior)

32
Q

dorsal ramus = somatic motor and sensory fibers diverge into smaller nerves which innnervate what?

A

the skin and DEEP muscles of the head, neck and back.

33
Q

what is a plexus?

A

braiding, or networking of ventral rami