What is Peripheral Neuropathy?

Neurobiology of Peripheral Nerve Dysfunction

Peripheral nerves serve as conduits transferring sensory perceptions and motor commands between the central nervous system and the limbs. Neuropathy occurs when mechanical compression, ischemia, trauma, or metabolic insults induce demyelination or axonal degeneration.

Orthopedic Relevance

Orthopedic surgeons routinely treat focal entrapment neuropathies (carpal, cubital, and tarsal tunnel syndromes), post-traumatic traction neuropraxias, and lacerations amenable to microsurgical neurolysis or nerve grafting.

Clinical Manifestations

• Glove-and-stocking sensory distribution paresthesia and numbness
• Sharp, burning, or lancinating electric shock sensations
• Tactile allodynia (pain from harmless touch) or blunted protective sensation
• Focal muscle weakness, loss of tendon reflexes, and balance issues

Frequently Asked Questions

Can injured peripheral nerves regenerate?

Yes, peripheral nerve axons can regenerate at a biological rate of roughly 1 mm per day once compressive mechanical forces are surgically released.

What is the definitive diagnostic evaluation?

Electromyography and nerve conduction studies (EMG/NCS) represent the gold standard for quantifying axonal loss and localization.