lecture 3- spinal cord

Question 1

What does having the following tell us about location?

• Large ventral horn
• both dorsal columns (facillus cutaneous)
• lateral horn

Answer 1

• C5-T1
• above T5
• T1-L2

Question 2

What type of info do the following tracts have?
Lateral corticospinal
Fasciculs gracilis
post/ant spinocerebral
ant/lat spinothalamic

Answer 2

motor, all sense but pain and temp, fine tuning, pain and temp

Question 3

Motor systems:

Differentiate between LMN and UMN lesions

Answer 3

LMN= flaccid paralysis, at the same level, no reflex
UMN= spastic paralysis, one level below, slow relfex, no control

Question 4

Sensory systems:
What info does the DCML have? Where does it decussate?
What is the function of the AL-STS and what side are injuries on?

Answer 4

All sensory but pain and temp, decussates at 2nd order.

Pain/temp, always contralateral unless both sides injured

Question 5

Spinal cord lesions:

Hemisection, describe and symptoms

Answer 5

ipslateral loss of senses, contra of pain and temp, paralysis at level (ipsi)

Question 6

Spinal chord lesions:

Poliomyelitis, draw it,

Answer 6

LMN injury, flaccid paralysis and muscle atrophy

Question 7

ALS: what does it effect?

Answer 7

UMR/LMR, moves down cord

Question 8

Anterior spinal artery

Answer 8

all lost, both sides except DCML

Question 9

Syringomyelia

Answer 9

no pain and temp on both sides

Question 10

tabes dorsalis

Answer 10

bilateral loss of DCML

Question 11

subacute combined degeneration (due to low b12)

Answer 11

effects bilateral DCML, all things myelinated

Question 12

Describe the loss of function that occurs if there are injuries to the follow regions of the vetebrae:
C1-C3
C4-C5
C6-C8
T1-T9
T10-L1
L2-L3

Answer 12

1) nothing below head
2) quadrapalegic
3) no lower body, upper body sketch
4) parapeligic
5) may need crutches
6) almost normal legs, very few need crutches