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Characterisation of the Hoffmann Reflex using Mechanomyography

Campbell, Niall and Murphy, Chris and Caulfield, Brian and Ward, Tomas and Deegan, Catherine (2008) Characterisation of the Hoffmann Reflex using Mechanomyography. In: XVIIth Congress of the International Society of Electrophysiology and Kinesiology.

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Abstract

Mechanomyography (MMG) is a technique for recording mechanical activity in contracting muscle. The MMG signal is low frequency, typically 5-100Hz.This MMG ‘sound’ is produced by lateral oscillations of muscle fibres which occur at the resonant frequency of the muscle. The analysis of MMG signals has allowed examination of various aspects of muscle function such as neuromuscular fatigue, muscle fibre type distributions and neuromuscular disorders. To date, Electromyography (EMG) has been considered the primary non-invasive technique to record and interpret the physiological properties of contracting muscle. The Hoffmann reflex (H-reflex) is the equivalent of the monosynaptic stretch reflex, elicited by electrical stimulation. The aim of this investigation was to characterise the Hoffman reflex using an MMG system. The system is based on 2-axis MEMS (Micro Electro-Mechanical System) sensors placed on the soleus muscle.

Item Type: Conference or Workshop Item (Paper)
Keywords: Hoffmann Reflex; Mechanomyography;
Subjects: Science & Engineering > Electronic Engineering
Item ID: 1346
Depositing User: Dr Tomas Ward
Date Deposited: 12 May 2009 09:49
Refereed: Yes
URI:

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