【2017年整理】实验一坐骨神经腓肠肌标本的制备、刺激强度和刺激频率与骨骼肌收缩反应的关系.ppt

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2017-06-12 发布于浙江
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【2017年整理】实验一坐骨神经腓肠肌标本的制备、刺激强度和刺激频率与骨骼肌收缩反应的关系.ppt

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【2017年整理】实验一坐骨神经腓肠肌标本的制备、刺激强度和刺激频率与骨骼肌收缩反应的关系

实验一;实验目的;一、基本原理：;二、动物与器材：;（一）标本的制备 1．双毁髓左手握蟾蜍背向上，食指按其头部，拇指压住躯干背部，右手拿解剖针由两眼之间沿中线象后方划触至两眼后腺之间的凹隙处观察——即枕骨大孔的位置。针刺入颅腔，捣毁脑组织，针转向后后方捣毁脊髓。;2．在荐椎上方剪断皮肤和脊柱，弃其头部和内脏，然后左手握住断开的脊柱后部，右手向后撕裂皮肤，接着将两后肢一分为二，即剪断耻骨联合（尾杆骨留在一侧）纵向剪开脊柱。;3．分离坐骨神经：将一侧后肢的脊柱端腹面向上，趾端向外侧翻转，使其足底朝上。用大头针将标本固定，在蛙板上用玻璃钩分离坐骨神经。 4．分离股骨;Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.;Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.;Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.;Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.;Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.;Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.;Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.;Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.;Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.;Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.;Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.;Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.;Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.;Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.;Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.