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12 Cards in this Set
- Front
- Back
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oribcularis oris |
origin: corner of lips insertion: facial midline course/direction: horizontally/laterally within lips function: constricts oral opening, facilitates lip closure, protrusion, and compression against teeth innervation: VII (facial - buccal branch) |
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risorius |
origin: posterior along fascia of masseter muscle above parotid gland insertion: modiolus (corners of mouth) course/direction: forward function: retracts corners of the mouth innervation: VII facial (buccal and zygomatic branches) |
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buccinator |
origin: (a) pterygomandibular ligament (running from the hamulus to posterior mylohyoid line of inner mandible (b) alveolar process of mandible and maxillae insertion: upper and lower orbicularis oris course/direction: forward - runs parallel (but deep) to risorius function: main muscle of the cheek, retracts corners of mouth, keeps food on molar surface of teeth innervation: VII facial (buccal branch) |
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levator labii superioris alaeque nasi |
origin: frontal process of maxilla insertion: orbicularis oris at angle of mouth course/direction: down along lateral margin of nose function: dilates nostrils, elevates upper lip innervation: VII facial (buccal + zygomatic branches) |
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levator labii superioris |
origin: inferior maxillary surface of orbit insertion: orbicularis oris at angle of mouth course/direction: down function: elevates upper lip innervation: VII facial (buccal and zygomatic) |
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zygomatic minor |
origin: zygomatic bone insertion: orbicularis oris at angle of mouth course: down function: elevates upper lip, deepens nasolabial fold innervation: VII facial (buccal + zygomatic) |
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zygomatic major |
origin: zygomatic bone insertion: corners of mouth and upper lip course: oblique function: draws corner of mouth up and laterally (true smiling muscle) innervation: VII facial (buccal + zygomatic) |
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levator anguli oris |
origin: maxilla insertion: corners of mouth and upper lip course: down function: draws corner of mouth up and laterally innervation: VII facial (buccal + zygomatic) |
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depressor labii inferioris |
origin: mandible (external oblique line) insertion: lower lip course: up function: pulls lip down and out innervation: VII facial (mandibular and buccal) |
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depressor anguli oris |
origin: mandible (external oblique line) insertion: corners of mouth course: fans upwards function: depresses corners of upper lip, compresses lips innervation: VII facial (mandibular and buccal) |
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mentalis |
origin: incisive fossa of mandible insertion: skin of chin course: down function: elevates and wrinkles chin, pulls lower lip out innervation: VII facial (mandibular branch) |
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platysma |
origin: fascia overlying pectoralis major and deltoid insertion: corner of mouth and lower margin of mandible course: fans upward function: depresses mandible, pulls skin of neck upward ('collar loosener') innervation: VII facial (cervical branch) |
