笑肌 Risorius
（重定向自Risorius muscle）
笑肌为微笑时所运用之肌肉，广义的笑肌指笑肌，口角提肌口角降肌。笑肌位于口的两侧，各有一块，在微笑或大笑时能使嘴张开。另有两块肌肉，可让嘴角运动。嘴的两个外缘各有一块口角提肌，可使嘴角翘起。颏的两侧各有一块口角降肌，可使嘴角下垂。
Risorius muscle
中文百科
英语百科
Risorius 笑肌
（重定向自Risorius muscle）
The risorius is a muscle of facial expression which arises in the fascia over the parotid gland and, passing horizontally forward, superficial to the platysma, inserts onto the skin at the angle of the mouth. It is a narrow bundle of fibers, broadest at its origin, but varies much in its size and form.
- constant periodic oscillation的意思
- constant periodic rent的意思
- constant period of drying的意思
- constant permeability alloy的意思
- constant permeability magnetic material的意思
- constant permeable alloy的意思
- constant phantom pain的意思
- constant phase的意思
- constant phase angle的意思
- constant phase angle curve的意思
- constant phase angle locus的意思
- constant phase coherent illumination的意思
- constant phase coherent imaging的意思
- constant phase shifting network的意思
- constant phase surface antenna的意思
- constant pitch的意思
- constant pitch airscrew的意思
- constant pitch cross winding的意思
- constantpitched tread的意思
- constant pitched tread的意思
- constant pitch propeller的意思
- constant pitch screw的意思
- Constant pool的意思
- constant portion的意思
- constant position input的意思