Entrapment Neuropathies Flashcards

1
Q

What is Seddon’s classification used to describe?

A

nerve injury

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2
Q

what are the 3 parts to Seddon’s classification?

A
  1. neurotmesis
  2. axontmesis
  3. neuropraxia
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3
Q

which is the most devastating nerve injury?

A

neurotmesis - implies compelte disruption of a nerve as well as associated CT

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4
Q

what is neurotmesis?

A

(Nerve division) implies complete disruption of a nerve as well as associated CT

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5
Q

what is axontmesis?

A

(lesion in continuity)

axonal disruption but supportive CT is maintained

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6
Q

what are some causes of axontmesis?

A

prolonged compression
traction
ischemia
toxins

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7
Q

what is neuropraxis?

A

(transient block) - a disruption of the myelin sheath

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8
Q

Sunderlan’ds classifcation of second degree (Class 2) is what in Seddon?

A

regeneration to Seddon’s axonotmesis

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9
Q

Sunderlan’ds classification of 1st degree (Class 1) is equivalent to what in Seddon?

A

neuropraxia

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10
Q

what happens in first degree (class 1) of sunderland?

A

conduction deficit w/o axonal interruption

Neuropraxia

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11
Q

what happens in 2nd degree (class 2) of sunderland?

A

(axontmesis)

- axon severed w/o breaching endoneurium

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12
Q

in which sunderland classification is the endoneurium lesioned?

A

third degree (class 2)

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13
Q

what happens in fourth degree (class 2)?

A

only epineurium remains intact

injury requires surgical repair

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14
Q

what is the complete transection of nerve called in Sunderland classification?

A

fifth degree (Class 3)

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15
Q

what nerve is impinged in the tarsal tunnel?

A

tibial nerve

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16
Q

what nerve is iminpinged in adductor canal?

A

saphenous nerve

17
Q

what nerve is impinged around fibular head?

A

common peroneal nerve

18
Q

what nerve is impinged around lateral malleolus?

A

sural nerve

19
Q

what nerve is impinged around the deep fascia proximal to ankle?

A

superficial peroneal nerve

20
Q

what are the borders to tarsal tunnel?

A

anterior- tibia
lateral- talus & calcaneus
medial- flexor retinaculum

21
Q

what does an MRI show you with tarsal tunnel presentation?

A

space-occupying lesion possibly