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Muscles
Muscles of the Lower Jaw
18
Anatomy
Undergraduate 4
11/08/2007
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Term
Masseter (Origin)
 Definition
Zygomatic arch
Term
Masseter (Insertion)
 Definition
Lateral ramus of mandible
Term
Masseter (Action)
 Definition
Elevates manible
Term
Temporalis (Origin)
 Definition
Temporal fossa
Term
Temporalis (Insertion)
 Definition
Coronoid process of mandible
Term
Temporalis (Action)
 Definition
Elevates mandible
Term
Mylohyoid (Origin)
 Definition
Inferior border of mandible
Term
Mylohyoid (Insertion)
 Definition
Hyoid
Term
Mylohyoid (Action)
 Definition
Elevates hyoid and floor of mouth, depresses mandible
Term
Digastric: Anterior Belly (Origin)
 Definition
Inferior border of mandible at chin
Term
Digastric: Anterior Belly (Insertion)
 Definition
Hyoid via intermediate tendon
Term
Digastric: Anterior Belly (Action)
 Definition
Elevates hyoid, depresses mandible
Term
Digastric: Posterior Belly (Origin)
 Definition
Mastoid region of temporal bone
Term
Digastric: Posterior Belly (Insertion)
 Definition
Hyoid via intermediate tendon
Term
Digastric: Posterior Belly (Action)
 Definition
Elevates hyoid, depresses mandible
Term
Platysma (Origin)
 Definition
Fascia of neck and chest
Term
Platysma (Insertion)
 Definition
Inferior border of mandible
Term
Platysma (Action)
 Definition
Depresses mandible
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