Exam 2 - spinal cord anatomy

Question 1

spinal cord functions

Answer 1

1. sensory input/motor output for neck, trunk, limbs, tail
2. reflex control of patterned movement and adjustment of glandular acitvity in response to local afferent input w/o voluntary control
3. info to/from brain

Question 2

spinal nerves

Answer 2

C8
T13
L7
S3
Cd5

Question 3

4 branches of each spinal nerve

Answer 3

meningeal br
dorsal br
ventral br
communicating br

Question 4

meningeal br

Answer 4

sensory

Question 5

dorsal br

Answer 5

sensory and motor
deep mm and skin dorsal to vert.

Question 6

ventral br.

Answer 6

sensory and motor
mm and skin of limbs and ventral region of trunk
brachial and lumbosacral plexuses

Question 7

communicating br

Answer 7

general visceral efferents (sympathetic) and afferent fibers inn. visceral structures

Question 8

what is different about gray matter in the thoracic and lumbar vert

Answer 8

T1-L3/4 have lateral horn, other vertebrates only have dorsal and ventral horns

Question 9

dorsal funiculus

Answer 9

proprioception
large fibers, most superficial = easily damaged
dorsal-column medial lemniscus pathway

Question 10

lateral funiculus

Answer 10

superficial noxious stimulus
voluntary movements
spinocervicothalamic pathway

Question 11

ventral funiculus

Answer 11

deep noxious stimulus
voluntary movements
spinoreticulothalamic tract

Question 12

cranial cervical region

Answer 12

C1-5

Question 13

cervicothoracic region

Answer 13

C6-T2

Question 14

thoracolumbar region

Answer 14

T3-L3

Question 15

lumbosacral region

Answer 15

L4-S2

Question 16

sacral region

Answer 16

S1-3

Question 17

caudal region

Answer 17

Cd1-5

Question 18

cervical enlargement

Answer 18

C6-T2

Question 19

lumbar enlargement

Answer 19

L4-S2