Cross Section Spinal Cord Anatomy

Question 1

Spinal cord is made of:

Answer 1

31 segments.
Top of 1 vertebra to top of next

Spinal nerves extend from each segment

Question 2

Posterior median sulcus

Answer 2

Shallow groove on posterior edge of spinal cord

Question 3

Anterior median fissure

Answer 3

Wide split on anterior edge of spinal cord

Question 4

Gray matter

Answer 4

Dark-colored mass in center of spinal cord

Question 5

dark matter houses:

Answer 5

Dendrites, cell bodied of motor and associate neurons, and mostly unmyelinated axons

(Parts of sensory axons)

Question 6

Horns

Answer 6

Organizational regions of grey matter

Question 7

White matter

Answer 7

Outer light-colored area of spinal cord i

Question 8

White matter contains:

Answer 8

Mostly myelinated axons

Question 9

Tract

Answer 9

Bundles of axons inside white matter

Question 10

Column

Answer 10

Organizational region of white matter

Question 11

Tracts Carry impulses up cord

Answer 11

Ascending/sensory tract

Question 12

Ascending tract naming:

Answer 12

Named according to where impulse starts

Question 13

Ascending tract example

Answer 13

spinothalamic tract

Originated in spinal cord and carried to thalamus

Question 14

Tracts carry impulses

down spinal cord

Answer 14

Descending/ motor tract

Question 15

Motor impulse naming:

Answer 15

Named according to where the impulse starts/ ends

Question 16

Descending tract example

Answer 16

corticospinal tract

Starts in cortex ends in spine

Question 17

Gray commissure

Answer 17

Region used to send impulse from 1 side of cord to another