Effect of Anesthesia of the Sinus Tarsi on Peroneal Reaction Time in Patients with Functional Instability of the Ankle
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- Khin-Myo-Hla
- Doctoral Program of Medicine, Department of Orthopaedic Surgery, Institute of Clinical Medicine, University of Tsukuba, Tsukuba, Japan.
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- Tomoo Ishii
- Assistant Professor, Department of Orthopaedic Surgery, Institute of Clinical Medicine, University of Tsukuba, Tsukuba, Japan.
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- Masataka Sakane
- Assistant Professor, Department of Orthopaedic Surgery, Ibaraki Prefectural University of Health Sciences, Ami, Ibaraki, Japan.
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- Koichiro Hayashi
- Professor emeritus, Department of Orthopaedic Surgery, Institute of Clinical Medicine, University of Tsukuba, Tsukuba, Japan.
抄録
<jats:p>We investigated peroneal reaction time (PRT) of 18 patients (21 ankles) with functional instability of the ankle and 8 healthy volunteer controls (9 ankles) before and after injecting local anesthetic into the sinus tarsi. The median PRT in patients before the injection was 82.0 ms, a significant delay from 71.0 ms in controls. After the injection, PRT in controls did not change, but PRT in patients significantly shortened to 69.3 ms. The sense of instability and the functional instability improved simultaneously. A disorder of the gamma-muscle-spindle system, induced by proprioceptive deficit after damage to a ligament, has been advocated as a cause of prolonged PRT. We suggest that irritability of mechanoreceptors or nociceptors or both, induced by inflammation at the sinus tarsi, may suppress the activities of gamma motor neurons of peroneal muscles, which in turn might cause the symptoms of functional instability and prolonged PRT.</jats:p>
収録刊行物
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- Foot & Ankle International
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Foot & Ankle International 20 (9), 554-559, 1999-09
SAGE Publications
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詳細情報 詳細情報について
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- CRID
- 1362544421358586624
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- NII論文ID
- 10008825107
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- ISSN
- 19447876
- 10711007
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- データソース種別
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