Peripheral neve lesion

Question 1

types of peripheral nerve damage:

Name 3:

Answer 1

• Neuropraxia = segmental demyelination, no axonal discontinuity; can recover; eg. Saturday night palsy
• Axonotmesis = axon discontinued but intact sheath; complete motor loss with or w/o sensory involvement
• Neurotmesis = loss of continuity of entire nerve trunk; complete motor and sensation loss

Question 2

Peripheral nerve Lesion cause:

Answer 2

• lack of axonal continuity–> atrophy
• negative symptoms: sensory loss, ↓tone, ↓reflex, muscle fasciculation, muscle atrophy
• positive symptoms (from excessive firing):

twitching, cramps, tingling
- eg. Trigeminal neuralgia, carpal tunnel syndrome, Guillain-Barre, Diabetic neuropathy, Alcoholic neuropathy

Question 3

Peripheral nerve lesion

=

sensory and motor (LMN)

Symptoms are:

Answer 3

Loss of sensation,

decrease reflex and muscle tone,

muscle fasciculation-> muscle atrophy

Question 4

• Peripheral nerve lesion*
• Name 9 Neuropathies:*

Answer 4

Trigeminal neuralgia (tic douloureux)

Postherpetic neuralgia

Carpal Tunnel Syndrome

Sciatica

Guillain-Barré syndrome

Peroneal Muscular Atrophy

Diabetic Neuropathy Syndromes

Alcoholic Neuropathy

Uremic Neuropathy

Question 5

• Negative phenomena*
• vs*
• Positive phenomena*

Answer 5