Pathway Reviews

Question 1

Anterior White Commisure

Answer 1

Central cord where 2nd order pain/temp neurons cross over at level of entry in SC. so if you lesion, get bilateral loss only at that level

Question 2

Important Point About Anterior Corticospinal Tract

Answer 2

Doesn’t decussate in pyramid, instead control musculature where coordination b/w muscles on both sides of body important like trunk musculature

Question 3

Babinski Test

Answer 3

Tests corticospinal tract/UMNs. Drag point across sole and should flex toes down. If UMNs not working get Babinksi sign, fanning of toes

Question 4

5 Characteristics of UMN Lesions

Answer 4

Muscle weakness
Hypertonia and increased deep tendon reflexes
No atrophy or fasciculations

Question 5

5 Characteristics of LMN Lesions

Answer 5

Muscle weakness/wasting
Hypotonia and decreased tendon reflexes
Fibrillations and fasciculations

Question 6

VII UMN Lesion

Answer 6

Contralateral paralysis below eye. Ask to raise eyebrowns

Question 7

VII LMN Lesion

Answer 7

Ipsilateral loss of whole face

Question 8

XII UMN vs. LMN Lesion

Answer 8

UMN will go contro, LMN ipsi

Question 9

How to test Dorsal Column Lesion (like from syphilis)

Answer 9

Romberg’s test, won’t be able to stand straight w/ eyes close bc lost some proprio