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[Passive length-tension curves of extraocular muscles after botulinum toxin injection]
1Department of Ophthalmology, Okayama University Medical School, Japan.
Abstract:
Botulinum A toxin was injected into the superior rectus muscles of albino rabbits. Length-tension curves of detached superior rectus muscles were continuously measured with a length and tension measuring device developed by the author. The device consists of a strain gauge for measuring passive length-tension, and a position encoder equipped with an eddy current motor. The passive load of the muscle injected with Botulinum A toxin was significantly less than that of control muscle a week after the injection, however, it was greater than that of control muscle in 2 or 3 weeks after the injection. The compliance of the treated muscle was significantly less than that of control muscle at 3 weeks after the injection.
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