Spinal Cord

Question 1

2 Anterior Horn Enlargements

Answer 1

Cervical (C5-T1) for upper extremity

Lumbosacral (L1-S3) for lower

Question 2

Somatotropic Distribution in Anterior Horn

Answer 2

Proximal innervation more medial

Question 3

2 Ascending White Matter Tracts in Posterior Column

Answer 3

Fasciculus cuneatus - upper extremity, anything coming in above T6
Fasciculus gracilis - lower, coming in below

Question 4

Lateral Horn Gray Matter Content

Answer 4

Intermediolateral cell column - pregang symp nerve bodies

Question 5

4 Ascending Spinal Cord Tracts (2 lateral and 2 posterior)

Answer 5

Spinothalamic Tract
Spinocerebellar Tracts
Fasciculus cuneatus and gracilis

Question 6

4 Descending Spinal Cord Anterior Column Tracts

Answer 6

Anterior corticospinal tract
Tectospinal Tract
Vestibulospinal tract
Reticulospinal tract

Question 7

Spinothalamic Tract

Answer 7

Pain and temperature, synapse and cross in spinal cord so go up contralateral. Diff from gen sense which go up ipsi, so test w/ feather and pinprick

Question 8

Spinocerebellar Tracts

Answer 8

Carry proprioceptive information

Question 9

2 Descending Lateral Column Tracts

Answer 9

Rubrospinal tract

Corticospinal tract

Question 10

(Lateral) Corticospinal tract

Answer 10

Volitional fibers from cortex that synapse on anterior horn to give lower motor neurons

Question 11

Vestibulospinal tract

Answer 11

Vestibular system for balance

Question 12

Reticulospinal Tract

Answer 12

Brings info to spinal cord about wakefulness and deals with autonomics. Not really sensory or motor

Question 13

Tectospinal tract

Answer 13

Visual into upper SC so head moves correctly

Question 14

Anterior corticospinal tract

Answer 14

Fibers that have branched off to innervate trunk musculature, similar (and can compensate for) to lateral corticospinal tract which does extremities

Question 15

2 Contents of Intervertebral Discs

Answer 15

Nucleus pulposus and anulus fibrosus