Spinal cord

Question 1

Cauda equina

Answer 1

inferior to conus medullaris; nerve roots project

Question 2

central canal

Answer 2

CSF flow

Question 3

cervical enlargement

Answer 3

inferior part of spinal cord; contains neurons that innervate upper limbs

Question 4

conus medullaris

Answer 4

tapering inferior end of spinal cord; marks official ‘end’ of spinal cord proper

Question 5

dorsal/ posterior median sulcus

Answer 5

narrow groove, dips internally on posterior surface

Question 6

dorsal/ posterior ramus

Answer 6

innervates deep back muscle and skin of back

Question 7

dorsal/ posterior root

Answer 7

give rise to rootlets; contain sensory axons only

Question 8

dorsal/ posterior root ganglion

Answer 8

cell bodies of sensory neurons within posterior root

Question 9

filum terminale

Answer 9

within caudal equine; thin strand of pia mater helps anchor conus medullar is to coccyx

Question 10

funiculus

Answer 10

white matter of spinal cord; contains both ascending and descending tracts (both sensory and motor axons)

Question 11

gray matter horns

Answer 11

anterior/ lateral/ posterior and gray commissure; contain nuclei

Question 12

lumbar enlargement

Answer 12

extends through mid-lumbar part of spinal cord and innervates lower limbs

Question 13

tract

Answer 13

fasciculus- group or bundle of axons that travel together in CNS

Question 14

ventral/ anterior median fissure

Answer 14

wider groove on anterior surface

Question 15

ventral/ anterior ramus

Answer 15

splits into multiple other branches innervating anterior and lateral trunk, upper and lower limbs, and plexuses

Question 16

ventral/ anterior root

Answer 16

merging of anterior rootlets (motor axons)

Question 17

white matter tracts (columns)

Answer 17

conduct either sensory or motor nerve signals