14 - nerve lesions

Question 1

cutting/tear of nerve

Answer 1

requires microsurgery

some function may be regained or none at all

Question 2

major compression

Answer 2

axons are brown but still fascial sheath
withdraw back to cell body
nerve can regrow 1-3mm/day inside sheaths
months to recover

Question 3

minor compression

Answer 3

nerve compressed
disrupts axon, but not broken
nerve palsy (blood flow, infections, birth, bells palsy, stroke), inflammation
recovery - a few days/months depending on cause

Question 4

small bump or knock

Answer 4

spasm, pins and needles, ‘gone to sleep’

recovery - a few minutes

Question 5

lesion of the axillary nerve

Answer 5

deltoid, teres mnir and maybe triceps longehead affected