masseter reflex
An electrophysiological test of trigeminal nerve function by stimulating the mental nerve.
Full Definition
The masseter reflex is an electrophysiological test that evaluates trigeminal nerve function by electrically stimulating the mental nerve and recording responses from the masseter muscle. This test assesses the trigeminal nerve's motor and sensory components through a monosynaptic reflex arc within the brainstem. The masseter reflex produces a characteristic early response that can be compared bilaterally for amplitude and latency. This test is particularly useful for evaluating trigeminal nerve lesions, brainstem pathology affecting the trigeminal nuclear complex, and monitoring during surgical procedures involving the trigeminal nerve.
Usage
Usage note: Also known as the electrically elicited jaw jerk reflex.
In Context
- "The masseter reflex was absent on the right side following trigeminal nerve injury during dental surgery." — Nerve injury assessment
- "Bilateral masseter reflex abnormalities suggested brainstem involvement in the patient's neurological condition." — Brainstem function evaluation