Spinal Cord

Question 1

Conus Medullaris

Answer 1

inferior end of the spinal cord

Question 2

Filum Terminale

Answer 2

long filament of CT extending from the conus medullaris down to coccyx. Anchoring

Question 3

Cuada Equina

Answer 3

collection of spinal nerve roots in inferior end of vertebral column

Question 4

Cervical and Lumbar enlargements

Answer 4

where nerves for upper and lower limbs arise

Question 5

Spinal nerves

Answer 5

31
8 cervical 
12 thoracic
5 lumbar
5 sacral
1 coccygeal

the spinal cord segements are where each nerve emerges. The nerve emerges superior. ex: spinal cord nerve T5 is located at the level of vertebra T4.

Question 6

White matter Funiculi

Answer 6

white matter on each side of the spinal cord. “long ropes”. divided into :
dorsal (posterior)
ventral (anterior)
lateral

Question 7

Commisural fibers

Answer 7

carry info from one side of spinal cord to the other

Question 8

Gray matter of Spinal Cord

Answer 8

Form a ‘butterfly’
unmyelinated axons.
has narrow central cavity

Question 9

Dorsal horns

Answer 9

posterior wings. smaller. responsible for sensory half- somatic and visceral

Question 10

Ventral Horn

Answer 10

anterior wings. Larger. motor half- motor neurons send their axons out via these to supply muscles and glands. responsible for visceral autonomic and somatic motor.
Damage to this area will cause paralysis of skeletal muscles

Question 11

Lateral horn

Answer 11

small lateral columns. only in thoracic and superior lumbar

Question 12

Dorsal Root Ganglia

Answer 12

sensory neuron cell bodies that lie outside the spinal cord

Question 13

Dorsal Horn Interneurons

Answer 13

receive info from sensory neurons

Question 14

Parathesia

Answer 14

damage to the dorsal horn or sensory nerve cell bodies. Causes loss of sensory function