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Mastication muscles
Muscles derivates of the first visceral arch
Muscle | Origin | Insertion | Function |
---|---|---|---|
M. temporalis | Planum temporale, fascia temporalis | Proc. corocoideus mandibulae | Elevation of the mandible; posterior fibres pulls the mandible backward |
M. Masseter | Arcus zygomaticus | Tuberositas masseterica mandibulae | Elevation of the mandible |
M. Pterygoideus lateralis | Facies infratemporalis alae majores ossis sphenoidalis, lamina lateralis proc. pterygoidei | Fovea pterygoidea mandibulae | Bilateral contraction: Push mandible forward; Unilateral contraction: Push mandible laterally |
M. Pterygoideus medialis | Fossa pterygoidea ossis sphenoidalis | Tuberositas pterygoidea mandibulae (inside) | Elevation of the mandible; Bilateral contraction: Push mandible forward; Unilateral contraction: Push mandible laterally |