spinal cord organization

Question 1

spinal cord

Answer 1

encased in part of the central portion of the CNS
-42 to 45 cm long

Question 2

what is the spinal cord involved in …

Answer 2

sensory processing, motor outflow, and reflexes

Question 3

central nervous system

Answer 3

brain and spinal cord

Question 4

peripheral nervous system

Answer 4

cranial nerves, spinal nerves and autonomic nerves

Question 5

within individual vertebrae’s gray matter is in the _______ and white matter is ______________

Answer 5

center ; around the gray

Question 6

dorsal root

Answer 6

nerve fiber coming off the dorsal side

Question 7

dorsal root ganglia

Answer 7

where the dorsal root fibers sit

Question 8

dorsal median septum

Answer 8

goes down between both sides of the dorsal side

Question 9

dorsal intermediate septum

Answer 9

between the medium septum and the end of the dorsal side

Question 10

ventral root

Answer 10

nerve fibers coming off the ventral side

Question 11

spinal nerve

Answer 11

combined of both dorsal and ventral root nerve

Question 12

lateral column

Answer 12

side where white matter is

Question 13

ventral column

Answer 13

white matter at the ventral side

Question 14

ventral median fissure

Answer 14

within the ventral side of the white matter that separates it into half

Question 15

anterior/ventral white commissure

Answer 15

where white matter can cross over from side to side

Question 16

lissauer’s tract

Answer 16

axons coming in on the dorsal/lateral side

Question 17

intermediate zone

Answer 17

between the dorsal and ventral horns

Question 18

laminae of rexed

Answer 18

gray matter
-dorsal horn is lamina 1 through 6
-intermediate zone is lamina 7
-ventral horn is lamina 8 through 9
-lamina 10 surrounds central canal

Question 19

fasciculus gracilis

Answer 19

bundles of axons coming in from legs
-leg information coming up from all receptors

Question 20

fasciculus cuneatus

Answer 20

bundles of axons coming from upper extremities
-arm information coming in from receptors

Question 21

dorsal (posterior) spinocerebellar tract

Answer 21

tract on dorsal side from spinal cord to the cerbellum

Question 22

ventral (anterior) spinocerebellar tract

Answer 22

tract on the ventral side from spinal cord to cerebellum

Question 23

lateral corticospinal tract

Answer 23

descending and motor
-cortex to spinal cord

Question 24

rubrospinal tract

Answer 24

“red nucleus” within brainstem
-brainstem to spinal tract

Question 25

lateral spinothalamic tract

Answer 25

ascending from spinal cord to thalamus
-pain and temperature tract

Question 26

dorsal is the same as _______

Answer 26

posterior

Question 27

ventral is the same as ______

Answer 27

anterior

Question 28

dorsal/posterior horns

Answer 28

-substantia gelatinosa (what caps the posterior horn and stains pale)
-the body is composed of interneurons and projection neurons

Question 29

ventral/anterior horns

Answer 29

contains cell bodies of the large motor neurons that innervate skeletal muscles
-alpha motor cell bodies

Question 30

what is the motor pathway within the spinal cord

Answer 30

lateral ventrospinal tract
-run’s on ventral side and carrying information that will synapse here and send signals out, it goes everywhere to all levels of the spinal cord

Question 31

ventral is ________, dorsal is __________

Answer 31

motor ; sensory