カエルあご運動に関与する筋の張力感受性
書誌事項
- タイトル別名
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- Stretch sensitivity of muscles participating in mandibular movements in frogs
抄録
As an important factor in the regulation of mandibul ar movements, the stretch sensitivity of masticatory muscles was investigated. The muscles together with their nerves were isolated from bullfrogs and tested. Afferent nerve impulses from the muscles under some condtions were recorded and analyzed. The results were as in the followings:<BR>1) Impulses from the temporalis and pterygoideus (jaw -closing muscles) in the resting state were conspicuously small and varied in height, but they showed a higher frequency when compared with those of the sartorius and iliofubiralis (leg muscles).<BR>2) No impulse was obtained from the geniohyoideus (jaw -opening muscle) in either the resting or in the stretched state.<BR>3) Impulse frequencies from temporalis, pterygoideus, and sartorius muscles increased with increasing degree of stretch. But the heights of impulses from the temporalis and pterygoideus changed from varied to constant as the degree of stretching increased. This was not true for the sartorius<BR>4) From the relationship between impulse frequency calculated per 1g of muscle and stretch tension, the stretch sensitivity was in the order of pterygoideus>temporalis>sartoriu s.<BR>5) No increase in impulse frequency in any muscle was observed under an isometric cont ractureby soaking the muscles in a KC1 rich medium.<BR>6) From the experimental results, the regulating role of the impulse was discussed in terms of mandibular movements in frogs.
収録刊行物
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- 歯科基礎医学会雑誌
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歯科基礎医学会雑誌 26 (3), 679-685, 1984
歯科基礎医学会
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詳細情報 詳細情報について
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- CRID
- 1390001204683071488
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- NII論文ID
- 130004001268
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- ISSN
- 03850137
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可