Term
|
Definition
transiet compression
complete severance |
|
|
Term
| compression/traction injuries: status of the axon |
|
Definition
|
|
Term
| compression/traction injuries: how do they block conduction |
|
Definition
|
|
Term
| compression/traction injuries: what are the ischemic changes d/t |
|
Definition
| impedance of microvascular circulation and indirectly from inflammatory resposne causing edema and congestion |
|
|
Term
| compression/traction injuries: mechanically damages a nerve by what (3) |
|
Definition
fibrosis
scarring
segmental demylenation |
|
|
Term
| compression/traction injuries: what symptom descriptor is used to describe transietn compression injury |
|
Definition
|
|
Term
| compression/traction injuries: how long do these types of injuries take to resolve |
|
Definition
|
|
Term
| compression/traction injuries: if the axon is damaged but the endoneural sheath is intact what happens |
|
Definition
| Wallerian degenaration occurs |
|
|
Term
| compression/traction injuries: what does wallerian degeneration refer to |
|
Definition
| nerve degeneration distal to the injury site |
|
|
Term
| compression/traction injuries: what happens to heal the nerve after wallerian degeneration |
|
Definition
| macrophages clear debris and nerve cell bodies synthesize proteins to initaite axonal regeneration |
|
|
Term
| compression/traction injuries: after the nerve cell bodies synthesize proteins to initiate axonal regeneration what happens next |
|
Definition
| axon sprouts along tube to end organ |
|
|
Term
| compression/traction injuries: what is axonotmesis |
|
Definition
| Axonotmesis is a disruption of nerve cell axon, with Wallerian degeneration occurring below and slightly proximal to the site of injury. If axons and their myelin sheath are damaged, but Schwann cells, the endoneurium, perineurium and epineurium remain intact, it is called axonotmesis |
|
|
Term
| Compression/traction injuries: axonotmesis prognosis depends on what |
|
Definition
| development of scar tissue within endoneural tube and severity of injury |
|
|
Term
|
Definition
|
|
Term
| Laceration Injury: what happens to the nerve |
|
Definition
| transects the entire nerve |
|
|
Term
| Laceration Injury: intervention required |
|
Definition
| surgical reapir needed for recovery although recovery is seldom complete |
|
|
Term
| Laceration Injury: neurotmesis recovery requries what |
|
Definition
| axonal growth, contact with end organ, cell body survival, nervous system integration |
|
|
Term
| Laceration Injury: how long does neurotmesis take |
|
Definition
| 1-3 months with functional reiinrvation continuing up to 1 year |
|
|
Term
| Laceration Injury: what happens to muscle fibres after 1 year after a laceration injury |
|
Definition
| mm fibers become fibrotic and nerve cell bodies die |
|
|
Term
| Laceration Injury: best prognosis requirements (5) |
|
Definition
clean laceration (less scarring and easier repair)
more distal injury (require less regeneration)
younger pt's (better functional outcomes)
non-smoker |
|
|
Term
| Which sensation will return to a pt with nerve damage first? |
|
Definition
|
|
Term
| Why does pain perception return first when a pt has nerve damage? |
|
Definition
| smallest C fibers tube requires less axoplasm to regenerate |
|
|
Term
| Which senses takes the 2nd longest to regenerate (3) |
|
Definition
Large B fibers
pain
temperature
proprioception |
|
|
Term
| Which sensations takes the longest to regenerate (3) |
|
Definition
Largest A-beta and -gamma
touch
pressure
movement sensation |
|
|
Term
| Which fibers take the longest time to regenerate |
|
Definition
|
|
Term
| Nerve regeneraiton average /day and /month |
|
Definition
|
|
Term
| Clinical ID of nn injuries: (2) |
|
Definition
Electromyoraphy (EMG)
Nerve Conduction Study (NCS) |
|
|
Term
| Clinical ID of nn injuries: what is an EMG |
|
Definition
| recording of electrical acvity (summated action potential) of a selcted mm or mm group during rest and with a voluntary contraction |
|
|
Term
| Clinical ID of nn injuries: types of EMG |
|
Definition
Surface EMG (SEMG)
Deep needle emg (NEMG)
Fine wire electrodes |
|
|
Term
| Clinical ID of nn injuries: EMG does not measure what |
|
Definition
|
|
Term
| Clinical ID of nn injuries: EMG is commonly used for what (4) |
|
Definition
peripheral nn injuries
ID neuromuscular disorders
Biomechanics research
Clinical biofeedback tool |
|
|
Term
| Clinical ID of nn injuries: NEMG pros and cons |
|
Definition
Can be uncomfortable
Very selective sampling of mm |
|
|
Term
| Clinical ID of nn injuries: SEMG limitations |
|
Definition
mm cross talk
tissue impedance issues |
|
|
Term
| Clinical ID of nn injuries: what is NCS |
|
Definition
| study of nerve conduction velocitis using transcutaneous stimulation |
|
|
Term
| Clinical ID of nn injuries: NCS: what is NCV |
|
Definition
| speed or velocity in m/sec of nerve conduction |
|
|
Term
| Clinical ID of nn injuries: NCS: what is latency |
|
Definition
| time b/w stimulus and nerve of mm response |
|
|
Term
| Clinical ID of nn injuries: NCS: what is latency |
|
Definition
| time b/w stimulus and nerve of mm response |
|
|
Term
| Clinical ID of nn injuries: NCS: can asses what |
|
Definition
|
|
Term
| Clinical ID of nn injuries: gold standard in dx of neuromuscular disorders |
|
Definition
|
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