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[016] Citation: D.S. Holder, A. Scott, B. Hannaford, L. Stark, 'High Resolution Electromyogram of the Human Eyeblink,'
Electromyogr. and Clinical Neurophys., vol. 27, pp. 481-488, 1987.
Abstract
The relationship between the electromyogram of the human eyelid muscles and
eyelid movement was investigated, using needle and surface EMG recordings and
limbus reflectance spectacles to obtain a simultaneous highly resolved record
of eye aperture.
It was found that the EMG pattern consisted of a single pulse envelope for each
of the orbicularis oculi and levator palpbrae superioris, which lasted for an
average of 129 and 195 ms respectively. Co-inhibition was present just prior
to orbicularis activity, and co-contraction was present during lid closure.
Each EMG pulse preceeded maximal velocity of eye aperture change by about
80 ms. Changes in duration of the blink correlated best with alterations in
the duration of eye closing and opening phases, with no significant change in
EMG. This suggested a change in the pattern of motor unit recruitment. A
pulse corresponding to levator activity was observed in the averaged surface
EMG trace, though it may have been artifactual.
It was concluded that the eyeblink provides a useful simple system for
investigation of the relation of the EMG to dynamic muscle movement.
["I would like a hard copy of this report"]
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Updated: Tue Aug 19 09:16:07 2008
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