【2017年整理】三课头部.ppt

8.上唇方肌 ??? 位置：分内眦头、眼眶下头和颧骨头三股，成放射状分布于鼻子左右的面部。 ??? 作用：提拉上唇等。 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. 颧肌：颧肌起自颧骨结节，止于口角皮下能牵拉口角向外上方。 口轮匝肌：它是环绕口部的肌肉，收缩时可闭嘴，嘴唇突出。 颏三角肌：起自下颌骨下缘，止于口角皮肤和口轮匝肌。形似 颧肌 口轮匝肌 颏三角肌 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 苹果肌并不是肌肉，主要是颧骨前的脂肪组织 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. 9.口轮匝肌 ??? 位置：口缝周围。 ??? 作用：闭嘴和各种嘴的动作。口轮匝肌内圈收缩时，能紧闭口裂做抿嘴表情；外圈收缩时，并在颏肌作用下，做撅嘴表情 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 下唇方肌：起自下颌骨下缘，止于口角和下唇皮肤。形似长方形 。作用是向下牵引下唇。 颏肌：起自下颌骨中部齿槽外面，至于颏部皮肤，一部分被下唇方肌覆盖 笑肌：起自颊部皮肤，止于口角皮肤，是浅层且薄的小块肌肉。作用是将口角拉向外上方，产生笑所覆盖，作用是可使下唇前突。 下唇方肌 颏肌 笑肌 笑肌 颊肌 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 10.下唇方肌 ??? 位置：口轮匝肌下方到颏结节外侧。 ??? 作用：下拉下嘴唇、嘴角。 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 颊肌：是上下颌之间的面颊肌肉，起自下颌骨啄突及上下颌骨齿槽的上下面，止于口轮匝肌深层和口角。??? 作用：吸允吹奏 颊肌 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 二咀嚼肌 颞肌：是一块较大的肌肉，呈扇面形。起自颞平面、颞窝和颞筋膜，止于下颌突。作用是上提下颌骨，后部肌束收缩时使下颌骨向后。 咬肌：是一块较厚结实的肌肉，起自颧骨的颧弓下缘，止于下颌骨的下颌支外面，作用是上提下颌骨，使上下颌骨闭合。 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 颞肌：是一块较大的肌肉，呈扇面形。起自颞平面、颞窝和颞筋膜，止于下颌突。作用是上提下颌骨，后部肌束收缩时使下颌骨向后。 颞肌 Evaluation only