Unit 4 - Head and Neck: Muscles of Mastication - Masseter and Temporalis (Ex. III) Flashcards Preview

Gross Anatomy '15 Ex. III > Unit 4 - Head and Neck: Muscles of Mastication - Masseter and Temporalis (Ex. III) > Flashcards

Flashcards in Unit 4 - Head and Neck: Muscles of Mastication - Masseter and Temporalis (Ex. III) Deck (2)
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1

temporalis

O: I temporal line of temporal fossa
I: coronoid process of mandible (apex and M surface)
Inn: mandibular n. (CN V3) via deep temporal nn.
A: vertical fibers - elevate mandible; horizontal fibers - retract mandible; unilaterally move mandible laterally (chewing)

2

masseter

O: superficial head - A 2/3 of zygomatic arch; deep head - P 1/3 of zygomatic arch
I: masseteric tuberosity of mandibular angle
Inn: mandibular n. (CN V3) via masseteric n.
A: elevates and protrudes mandible

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