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12 Cards in this Set
- Front
- Back
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4 classic mucles
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L and M pterygoid
temporalis masster |
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space within investing fasica, and path within investing fascia
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Masticator space
fascia splits at the lower margins of the mandible and floows the external surface of the masseter and internal surface of the medial pterygoid |
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layers of the masster
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superficial
middle deep |
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superifical layer of masster
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largest layer, comes from maxillary process of the zygomatic bone, and from the anterior 2/3 of the inferior border of the zygomatic arch and goes to angle and posterior half of lateral surface of mandible
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middle layer of masster
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from medial anterior 2/3 of zygomatic arch and lower border of posterior 1/3
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deep layer of masseter
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deep surface of zygomatic arch, attaches to the mandibular ramus of the coronoid process
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nerve that innervates masster
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N to masster- arises from ant. division of mandiular V3
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action of masster
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elevates the masster- OCCLUDES teeth
also small side to side, protraction, and retraction |
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temporalis muscle nerve
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deep temporal nerve from V3
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temporalis action
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elevates the mandible which requires vertical and horizontal to close the mouth
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attachments of temporalis
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arises from entire temporal fossa and from deep surface of temporal fascia.
fibers descend and pass under zygomatic arch and attach to cornoid, anterior ramus, retromolar fossa |
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fibers of temporalis
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anterior fibers are vertical, posterior fibers are horizontal
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