Spinal System

Question 1

name the parts of the spinal segment from top to bottom

Answer 1

anterior and posterior grey root, a/p rootlets, a/p roots, spinal ganglion, denticulate ligament, a/p primary rami, mixed spinal nerve (both afferent and efferent)

Question 2

motor neuron cells are in what part of spinal cord?

Answer 2

anterior (ventral) horn. they are called lower motor neurons.

Question 3

motor neurons leave spinal cord and form?

Answer 3

ventral roots that course into spinal nerves

Question 4

where do spinal nerves exit vertebral column?

Answer 4

intervertebral foramina

Question 5

once spinal nerve exits vertebral column, what does it split into?

Answer 5

dorsal and ventral rami

Question 6

what do dorsal rami innervate?

Answer 6

musculature and skin (not extremities)

Question 7

what do ventral rami innervate?

Answer 7

anterior of body and extremities