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

Question 1

CN VIII name

Answer 1

Vestibulocochlear nerve

Question 2

what does vestibulocochlear mean

Answer 2

small cavity; spiral snail-like; ear

Question 3

CN VIII: sensory, motor or mixed?

Answer 3

mixed but MAINLY SENSORY

Question 4

vestibulocochlear nerve: sensory: function?

Answer 4

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

Question 5

CN X name

Answer 5

vagus nerve

Question 6

what does vagus mean

Answer 6

wandering; vagrant

Question 7

CN X: sensory, motor mixed?

Answer 7

mixed

Question 8

CN X: components/innervates?

Answer 8

from pharynx, larynx, thoracic to abdominal viscera

Question 9

Vagus nerve: sensory: function?

Answer 9

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

Question 10

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

Answer 10

adrenal glands

Question 11

CN VIII: components/innervates?

Answer 11

inner ear

Question 12

how many branches does the vestibulocochlear nerve have?

Answer 12

2; vestibular (equilibrium) and cochlear (hearing)

Question 13

CN XI name

Answer 13

accessory nerve

Question 14

how does CN XI differ from all other CNs?

Answer 14

it originates from both the brain stem and the spinal cord

Question 15

accessory nerve mean?

Answer 15

assisting

Question 16

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

Answer 16

motor

Question 17

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

Answer 17

mixed but MAINLY MOTOR

Question 18

accessory nerve: spinal root: motor to what muscles?

Answer 18

trapezius and SCM

Question 19

accessory nerve: cranial root: serves what function?

Answer 19

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

Question 20

the accessory nerve exits the cranium through what foramen?

Answer 20

jugular

Question 21

ventral root (anterior) =

Answer 21

motor - efferent

Question 22

dorsal root (posterior) =

Answer 22

sensory - afferent

Question 23

dorsal root ganglion =

Answer 23

cell bodiesd of sensory neurons

Question 24

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

Answer 24

MIXED SPINAL NERVE.

Question 25

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

Answer 25

ramus.

Question 26

ramus = branch; all are __________ nerves.

Answer 26

mixed

Question 27

what is the posterior branch of the ramus?

Answer 27

dorsal ramus

Question 28

what is the anterior branch of the ramus?

Answer 28

ventral ramus

Question 29

do dorsal rami join together to form plexuses?

Answer 29

no; only ventral rami

Question 30

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

Answer 30

plexus; NOT ALL DO.

Question 31

ONLY _______ rami join together to form plexuses.

Answer 31

ventral (anterior)

Question 32

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

Answer 32

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

Question 33

what is a plexus?

Answer 33

braiding, or networking of ventral rami