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Assessment of Neuromuscular Function Using Percutaneous Electrical Nerve Stimulation

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Posterior interosseous neuropathy: electrodiagnostic evaluation.

Anna-Christina Bevelaqua¹, Catherine L Hayter, Joseph H Feinberg

¹Department of Physical Medicine and Rehabilitation, New York Presbyterian Hospital, 525 East 68th Street, F16, New York, NY 10065 USA.

HSS Journal : the Musculoskeletal Journal of Hospital for Special Surgery

|July 23, 2013

Summary

This summary is machine-generated.

Electrodiagnostic studies precisely locate nerve injuries, aiding in diagnosing conditions like posterior interosseous neuropathy. This case highlights its use in identifying forearm nerve damage, crucial for effective treatment.

Keywords:

electrodiagnostics electromyography (EMG)finger extension weakness nerve injury posterior interosseous nerve

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Area of Science:

Neurology
Nerve injury diagnosis
Electrodiagnostic medicine

Background:

Electrodiagnostic studies are essential for anatomically localizing nerve injuries.
These tests differentiate cervical radiculopathies, brachial plexopathies, and peripheral nerve injuries.
They aid in identifying or ruling out other neurological disorders.

Observation:

A 22-year-old male swimmer experienced left finger extensor weakness after pull-up exercises.
Left wrist extension was unaffected.
Electrodiagnostic testing indicated a severe, incomplete posterior interosseous neuropathy.

Findings:

Magnetic resonance imaging confirmed forearm nerve inflammation.
Posterior interosseous neuropathy typically presents with finger/thumb extensor weakness but intact wrist extension.
Accurate diagnosis relies on understanding the radial nerve's anatomy and distribution.

Implications:

Electrodiagnostic testing is vital for pinpointing nerve injury locations.
Understanding nerve anatomy is key to diagnosing conditions like posterior interosseous neuropathy.
These methods help exclude alternative neurological explanations for symptoms.