標籤: 暫無標籤

考察用靜息張力表徵離體蟾蜍腓腸肌等長收縮能力的有效性。方法 SOD抑製劑和維生素C聯合作用蟾蜍腓腸肌,記錄電刺激(12VDC,2ms波寬,2s間隔)下等長收縮張力變化,單指數函數加權擬合90%峰張力后的鬆弛過程測定鬆弛速度和靜息張力表徵收縮能力。結果 收縮1.0min后對照靜息張力在7.0min內單調下降而藥物處理后靜息張力先降后升,7.0min后處理組靜息張力相對初始值的增加值顯著高於對照組。同時,對照鬆弛速度大多單調下降,藥物處理后鬆弛速度多數先升后降,且10.0min內其鬆弛速度總低於相同時刻的對照組。結論 靜息張力可反映肌肉收縮能力。
ObjectiveTocharacterizetheisometriccontractilityofBufogastrocnemiusexvivoinlightoftheresttension.MethodsBufogastrocnemiustreatedwithSODinhibitorandascorbatewasstimulatedelectrically(12VDC,2msdurationwitha2sinterval)torecordthetensionwithin10min.Weightedfittingtotherelaxationcurveofthetensionbelow90%ofthepeaktensionwithamono-exponentialmodelyieldedtheresttensionandrelaxationrate.ResultsThecontrolgastrocnemiusshowedmonotonicdecreaseoftheresttension,buttreatmentwithSODinhibitorandascorbateresultedinadecreaseoftheresttensionfollowedbyafastincreasewithina1.0mincontraction.Theincreaseoftheresttensionat7.0minofcontractionofthetreatedmusclewassignificantlygreaterthanthatofthecontrolmuscle.Thecontrolmuscleshowedamonotonicdecreaseoftherelaxationratein10min,whereastreatmentwithSODinhibitorandascorbateproducedincreasedrelaxationratefollowedbymonotonicdecreasetillaplateauwasreached.Inthecourseofthe10minrecording,therelaxationrateofthetreatedmusclewaslowerthanthatofthecontrolafterthesamedurationofcontraction.ConclusionResttensionisacharacteristicindextorepresenttheskeletalmusclecontractility.

關鍵詞蟾蜍腓腸肌,等長收縮能力,肌肉損傷,靜息張力,鬆弛速度;Bufogastrocnemius,isometriccontractility,muscledamage,resttension,relaxationrate

上一篇[長時程抑制]    下一篇 [森林功能]

相關評論

同義詞:暫無同義詞