collision study
Electrodiagnostic technique using antidromic and orthodromic stimulation to assess nerve conduction pathway integrity.
Full Definition
A collision study is an advanced electrodiagnostic technique used to evaluate the continuity and conduction properties of peripheral nerves. The method involves stimulating a nerve from two different points simultaneously or in rapid succession, creating nerve impulses that travel toward each other (antidromic and orthodromic directions). When the impulses meet, they 'collide' and cancel each other out. This technique is particularly useful for assessing axon continuity in cases of suspected nerve injury, demyelination, or conduction block, and can help distinguish between different types of nerve pathology.
Usage
Usage note: Advanced technique requiring specialized technical expertise.
In Context
- "A collision study was performed to assess the integrity of the median nerve following the patient's wrist injury." — Nerve conduction study report
- "The collision study confirmed complete axon continuity despite the clinical weakness." — Electrodiagnostic evaluation