Nerve pain and injuries Flashcards
peripheral nerve lesions have what mechanisms of injury
mechanical (compression)
crush and percussion (fx, compartment syndrome)
laceration
penetrating
stretch
high velocity trauma
cold
When treating someone with peripheral nerve damage, all areas of ….
face, trunk and extremities should be assessed.
allodynia
sensation of pain in response to stimulus that would not typically produce pain
analgesia
absence of pain while remaining conscious
anesthesia
absence of touch sensation
causalgia
constant, relentless, burning hyperesthesia and hyperalgesia that develops after a peripheral nerve injury
dyesthesia
distortion of any of the senses, especially touch
hyperesthesia
heightened sensation
hyperpathia
extreme exaggerated response to pain
hypesthesia
diminished sensation of touch
neuralgia
severe and multiple shock-like pain that radiate from a specific nerve distribution
pallanesthesia
loss of vibratin sensation
paresthesia
abnormal sensations such as tingling, pins and needles or burning sensations
double crush syndrome
two separate lesions along same nerve that create more severe symptoms than if only one lesion existed
mononeuropathy
an isolated nerve lesion; associated conditions include trauma and entrapment
neuroma
abnormal growth of nerve cells; associated conditions include vasculitis, AIDS, and amyloidosis
polyneuropathy
diffuse nerve dysfunction that is symmetrical and typically secondary to pathology and not trauma
examples Guillain-Barre syndrome, peripheral neuropathy, use of neurotoxic drugs and HIV
Wallerian degeneration
degeneration that occurs distally, specifically to myelin sheath and axon
Mildest form of nerve injury
neurapraxia
What is neurapraxia?
conduction block usually due to myelin dysfunction
In neurapraxia, is nerve conduction preserved?
yes, proximal and distal to the lesion
Are the nerve fibers damaged in neurapraxia? or degneration?
no no
Symptoms of neurapraxia?
pain, minimal muscle atrophy, numbness or greater loss of motor and sensory function, diminished proprioception
Recovery time period for neurapraxia?
4-6 weeks
What injuries are the most common with neurapraxia?
pressure injuries
If you fx the neck of the humerus, and/or have an anterior dislocation of the shoulder, what type of nerve injury do you most likely have?
axillary
If you fx the clavicle what type of nerve injury do you most likely have?
musculocutaneous
If you compress the nerve at the radial tunnel and/or fx the humerus what type of nerve injury do you most likely have?
radial
If you compress the nerve at the carpal tunnel and/or have pronator teres entrapment, what type of nerve injury do you most likely have?
median
If you compress the nerve in the cubital tunnel and/or have entrapment at Guyon’s canal then what type of nerve injury do you most likely have?
ulnar
In the LE, many nerve injuries for women are secondary to …
labor
delivery
or surgical procedures around the pelvis
If you have a THA, displace acetabular fx, anterior dislocation of the femur, hysterectomy, and/or appendectomy, what kind of nerve injury could you have?
femoral
If you have blunt force trauma to the butt, THA, and/or accidental injection to the nerve, which nerve could have the injury?
sciatic