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Mimetic muscles

Mimetic muscles in the region of the mouth

MuscleOriginInsertionFunction
M. Orbicularis oris -pars marginalis et pars labialis Fibers arranged circularly Fibers arranged circularly Closes the lips; Protrudes lips forward (sucking shape)
M. Levator anguli oris Fossa canina Skin at the angle of the mouth Lifts the angle of the mouth
M. Levator labii superioris Margo infraorbitalis maxillae Skin of the upper lip Lifts the upper lip
M. Zygomaticus major et minor Os zygomaticum Skin at the angle of the mouth Lifts the angle of the mouth upward and laterally; Expression of pleasure (laughing muscle)
M. Risorius Fascia masseterica Skin at the angle of the mouth Pulls the angle of the mouth laterally; Produces the nasolabial folds; Expression of pleasure (laughing muscle)
M. Buccinator Proc. alveolaris maxillae et mandibulae; Raphe pterygomandibularis Skin at the angle of the mouth Pulls the angle of the mouth laterally; Compresses the cheeks; Expression of satisfaction
M. Depressor anguli oris Basis mandibulae Skin at the angle of the mouth Pulls the angle of the mouth downward; Expression of sadness
M. Depressor labii inferioris Basis mandibulae Skin of the upper lip Pulls the angle of the mouth and the lower lip downward; Expression of preserverance
M. Mentalis Proc. alveolaris Skin of the chin Produces the chin-lip furrow; Expression of doubt
Created by: gustafb82
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