Nerve Regeneration

Question 1

Wallerian degeneration

Answer 1

Active process of degeneration that results when a nerve fiber is cut or crushed and the part of the axon distal to the lesion degenerates, the myelin will also degenerate. This process occurs 2-3 days after injury

Question 2

Klumpkes paralysis

Answer 2

Traction injury of the lower brachial plexus

Question 3

Erbs paralysis

Answer 3

Traction injury affecting c5+c6 nerve roots (upper brachial plexus)

Question 4

Contraindications

Answer 4

Mx + mvmnts of affected limb CI for 3 weeks after surgery
Do not traction or move jt any way that may limit regeneration
No hydrl until autonomic + vasomotor control have returned
No deep pressure + frictioning on damaged skin
Jt play not performed on affected limb till jt stable

Question 5

Permanent lesions

Answer 5

-Occur when the nerve does not regenerate successfully
-damage to some fibers of the nerve

Question 6

Complete lesions

Answer 6

Has damage to all the fibers of the nerve while a partial lesion has damage to only some fibers of the nerve

Question 7

How fast can a nerve regenerate

Answer 7

Occurs at a rate of 1-2 mm a day.
- more distal the injury longer it will take

Question 8

What is a dermatone

Answer 8

Area of skin supplied by a single spinal nerve
-dermatones are useful in neurology for finding the site of damage in the spine

Question 9

Combination lesions

Answer 9

More then 1 nerve is damaged