User:Patrickmcgillen/neurapraxia
My group's proposal (in the form of an article outline)
Intro: What is it?
[edit]- temporary failure of nerve conduction in the absence of structural changes, due to blunt injury, compression, or ischemia
- Focal Conduction Block
- Transient
- Ischemic
- affects mainly large-caliber axons
- More persistent
- demyelinating
- attributable to an underlying primary/segmental demyelination
- axonal constriction
- injury to a nerve resulting in paralysis without degeneration and followed by rapid and complete recovery of function
- partial or complete conduction block over a segment of a nerve fiber, with temporary paralysis
- nerve condition characterized by localized loss of conduction that causes short-term paralysis, there is no degeneration of the axon and complete recovery is usual
Causes of Neuropraxia
[edit]- focal blocking of impulse conduction usually due to compression
- compression:
- exogenous pressure affecting a peripheral nerve causes decreased blood flow and structural deformation of nerve fibers
- compression:
- conduction study
- waveform, amplitude, duration
- latency and conduction velocity
- types of abnormalities
- reference: Peripheral Neuropathy 4th edition, 2005
- reference: Peripheral Neuropathy 4th edition, 2005
Diagnosis of Neurapraxia
[edit]- The most commonly described mechanism of injury is axial compression with a component of either hyperflexion or hyperextension
- early signs of nerve injury include:
- disturbance of sensation, weakness or paralysis of muscle, vasomotor and sudomotor paralysis in distribution of the affected nerve or nerves, abnormal sensitivity of nerve at point of injury
- Neurapraxia has been reported in association with developmental cervical spinal stenosis, kyphosis, congenital fusions (Klippel-Feil syndrome), cervical instability (traumatic or developmental), and invertebral disc herniation.
Symptoms of Neurapraxia
[edit]- large myelinated fibers more susceptible than small or unmyelinated ones
- predominant symptoms:
- loss of muscle strength
- loss of touch sensation
- disturbance of function can last from hrs to weeks only rarely months
- An episode of cervical cord neurapraxia generally resolves in less than 10-15 minutes.
- An episode of cervical cord neurapraxia generally resolves in less than 10-15 minutes.
Treatments for Neurapraxia
[edit]- prognosis for complete recovery is good
- peripheral neurons are large, spatially complex cells whose size and connectivity compromise their capacity to repair
- reference: Peripheral Neuropathy 4th edition, 2005
- Studies have shown that 56% of athletes returning to contact sports experienced a recurrent episode of transient cervical cord neurapraxia.
- This number was higher when an athlete returned to football versus another sport
- This number was higher when an athlete returned to football versus another sport
Experimental Case/Research Study on Neuropraxia
[edit]- Neurapraxia of the cervical spinal cord with transient quadriplegia
- JS Torg, H Pavlov, SE Genuario, B Sennett, RJ Wisneski, BH Robie and C Jahre J Bone Joint Surg Am. 1986;68:1354-1370.
- Cervical cord neurapraxia – An acute transient episode of bilateral sensory and motor abnormalities.