Tinel Sign
Pronunciation: tin-EL
Clinical test where tapping over a peripheral nerve produces tingling sensations along its distribution, indicating nerve irritation.
Full Definition
Tinel Sign is a diagnostic clinical test used to assess peripheral nerve function and identify areas of nerve compression or irritation. The test involves gentle tapping or percussion over the course of a peripheral nerve, with a positive result indicated by the reproduction of tingling, paresthesias, or electrical sensations along the nerve's sensory distribution. Named after French neurologist Jules Tinel, this sign is commonly used to evaluate median nerve compression at the wrist (carpal tunnel syndrome), ulnar nerve compression at the elbow (cubital tunnel syndrome), and various other entrapment neuropathies. A positive Tinel sign suggests nerve hyperexcitability due to compression, inflammation, or regeneration. The test should be performed with standardized force and documented with specific anatomical landmarks and symptom distribution.
Usage
Usage note: Capitalize as it is an eponymous sign; specify anatomical location and symptom distribution when positive.
In Context
- "A positive Tinel sign was elicited at the wrist with radiation of symptoms into the median nerve distribution." — physical examination note
- "Tinel sign testing should be performed both proximally and distally to the suspected compression site." — clinical examination protocol