Peri nerve injury Flashcards
what is a peri nerve injury
an acute traumatic injury to or chronic repetitive trauma
shear or compressive forces
what is neuropraxia
a nerve injury that causes transient (lasting only for a short time) and focal loss of function
related to compressive forces cuasing ischemia (carpal tunnel)
mildest form of nerve injury, no nerve degeneration
how long does neuropraxia normally last
can be rapidly reversed or can be presistent for weeks or months
what is Axonotmesis
focal damage to an axon and myelin and varying degrees of nerve connective tissue
what is the MOI for Axonotmesis:
seen w/ increased-duration and larger-amplitude compressive (crush injury) or traction forces
what is the regrowth rate for axons
1 inch per month
what is Neurotmesis:
severing of axon and myelin sheath and all connective tissue structures
what does Neurotmesis lead to
completed loss of function and required surgical intervention
myelin and axonal regeneration
axons that undergo regeneration do not remyelinate to preinjury
level (Important!)
this can impact nerve conduction rates
what is Collateral sprouting:
intact axons can pickup denervated terminal targets (muscles)
this often results in changing muscle fiber types (type 1 to type 2)
what is any example of an Mononeuropathy injury
(involvemennt of a single nerve)
carpal tunnel syndrome
what is Mononeuropathy multiplex:
involves 2 or more nerves without a clear patttern of neuropathy
presentation is often related to other health symtoms
what is a example of Mononeuropathy multiplex:
B/L CTS, left cubital tunnel, and right tarsal tunnel
what is Radiculopathy:
involvement of the nerve root
what is Plexopathy
involvement of brachial or lumbosacral plexus
