Spinal / Cranial Nerves

Question 1

what is carried in efferent nerve fibers

Answer 1

motor information

Question 2

what is carried in afferent nerve fibers

Answer 2

sensory nerve fibers

Question 3

what types of afferent fibers are there?

Answer 3

sensory and visceral

Question 4

what is in the dorsal root ganglion

Answer 4

cell bodies of afferent (sensory) nerves

Question 5

where can a synapse onto a projection neuron go?

Answer 5

to the same segment
one segment up
medulla oblongata or cerebellum

Question 6

where do all aferents in spinal cord project to?

Answer 6

medulla oblongata to thalamus and then sensory cortex

Question 7

what is carried in the ventral root?

Answer 7

motor nerve fibers

Question 8

where are the cell bodies of motor neurons?

Answer 8

ventral horn of gray matter

Question 9

what innervates motor neurons

Answer 9

descending tracts from brain

Question 10

what are the branches of the dorsal rami? what do they do?

Answer 10

lateral - motor innervation of the intrinsic back muscles
medial - posterior cutaneous branches that innervate skin of back

Question 11

what are the branches of the ventral rami?

Answer 11

lateral cutaneous branch
anterior cutaneous branch

Question 12

what are the branches of the lateral cutaneous branch of ventral rami?

Answer 12

anterior and posterior branch

Question 13

what are the branches of the anterior cutaneous branch of the ventral rami?

Answer 13

medial and lateral branch

Question 14

the cranial nerves that have efferent fibers will have ____ & ____ fibers

Answer 14

somatic and autonomic

Question 15

what are the four cranial nerves that carry parasympathetic outputs? # and name

Answer 15

CN3 - oculomotor
CN7 - facial
CN9 - glossopharyngeal
CN10 - vagus