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2006•International Journal of NeuroscienceRequires access

MIDDLE-FINGER REFLEX

Üner Tan

Open publisher page 1 citations

Abstract

A new reflex is described: middle-finger extensor reflex elicited by percussion of tendon insertion of musculus extensor digitorum communis in forearm. Following percussion using a reflex hammer, two EMG responses from the belly of the muscle were recorded: a short latency monosynaptic reflex with a latency of 31.4 +/- 1.5 ms (M1), and a long-latency middle-finger reflex with a mean latency of 64.8 +/- 6.31 ms (M2), the former being a monosynaptic extensor reflex, and the latter belonging to a spino-cortico-spinal reflex circuitry. It was suggested that the middle-finger extensor reflex elicited by radial nerve afferents and efferents (C7-C8) would be of clinical and theoretical importance.

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What this paper is about

A new reflex is described: middle-finger extensor reflex elicited by percussion of tendon insertion of musculus extensor digitorum communis in forearm. Following percussion using a reflex hammer, two EMG responses from the belly of the muscle were recorded: a short latency monosynaptic reflex with a latency of 31.4 +/- 1.5 ms (M1), and a long-latency middle-finger reflex with a mean latency of 64.8 +/- 6.31 ms (M2), the former being a monosynaptic extensor reflex, and the latter belonging to a spino-cortico-spinal reflex circuitry. It was suggested that the middle-finger extensor reflex elicited by radial nerve afferents and efferents (C7-C8) would be of clinical and theoretical importance.

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Available abstract

A new reflex is described: middle-finger extensor reflex elicited by percussion of tendon insertion of musculus extensor digitorum communis in forearm. Following percussion using a reflex hammer, two EMG responses from the belly of the muscle were recorded: a short latency monosynaptic reflex with a latency of 31.4 +/- 1.5 ms (M1), and a long-latency middle-finger reflex with a mean latency of 64.8 +/- 6.31 ms (M2), the former being a monosynaptic extensor reflex, and the latter belonging to a spino-cortico-spinal reflex circuitry. It was suggested that the middle-finger extensor reflex elicited by radial nerve afferents and efferents (C7-C8) would be of clinical and theoretical importance.

Key concepts: Triceps reflex, Ankle jerk reflex, Reflex, Anatomy, Extensor Digitorum Communis, Withdrawal reflex, H-reflex, Medicine

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