Equine Muscles

Origin: facial crest & zygomatic arch 

Insertion: Ramus of mandible 

Function: Mastication: Elevates the mandible and presses it against the maxilla 

Innervation: Masticatory n, branches from mandibular n

Origin: Temporal fossa and medial surface of the zygomatic arch 

Insertion: Coronoid process of the mandible 

Function: Mastication: Elevates the mandible and presses it against the maxilla 

Innervation: Masticatory n 

Origin: Spinousprocessofaxis

Insertion: Nuchal crest

Function: Elevateshead 

Innervation: Dorsal branch of C1

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