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Definition 11 |
Platysma Muscle
Action :
- elevates and creases skin of neck
- depression of lower lip and angle of mouth
Origin :
- Fascia or upper thorax and lower neck
Insertion :
- mandible (lower border)
- skin and fascia of lower face
- blends with muscles of lower lip and angle of mouth
Innervation :
- Facial nerve (cranial nerve VII)
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Definition 12 |
Zygomaticus major muscle
Action :
- Elevation of corner of mouth (smile)
Origin :
- zygomatic bone
Insertion :
- Blends with muscles at angle of mouth
Innervation :
- Facial nerve (Cranial nerve VII)
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