+
Related Flashcards
Related Topics
Cards In This Set
| Front | Back |
|
Name the 4 muscles of mastication
|
Masseter, temporalis, medial pterygoid, lateral pterygoid
|
|
Name the origin/insertion of the masseter
|
Origin: zygomatic archinsertion: lateral surface of ramus of mandible including the angle of the mandible
|
|
Name the action and innervation of the masseter
|
Action: powerful elevator of the mandibleinnervation: mandibular division of trigeminal
|
|
Name the origin and insertion of the temporalis muscle
|
Origin: the entire temporal fossainsertion: the coronoid process of the mandible
|
|
Name the action and innervation of the temporalis muscle
|
Action: retraction and elevation of the mandibleinnervation: mandibular division of trigeminal
|
|
Name the origin and insertion of the Medial Pterygoid muscle
|
Origin: medial surface of the lateral pterygoid plateinsertion: the internal surface of the angle of the mandible-also below and behind the mandibular foramen
|
|
Name the action and innervation of the Medial Pterygoid muscle
|
Action: elevates the mandible and assists in protrusion and lateral movements (though it's not it's primary function...see the lateral pterygoid)Innervation: mandibular division of trigeminal
|
|
Name the origin and insertion of the Lateral Pterygoid muscle
|
Origin: superior head from the inferior surface of the greater wing of the sphenoidInferior head from the lateral surface of the lateral pterygoid plateinsertion: anterior surface of the condylar neck/some fibers insert on the anterior surface of the TMJ capsule
|
|
Name the action and innervation of the Lateral Pterygoid muscle
|
Action: opens the mouth by depressing the mandible. when both sides contract, brings lower jaw forward (protrusion). If only one side contracts, it causes a lateral shift to the opposite sideInnervation: mandibular division of trigeminal
|
|
Name the accessory muscles of mastication (8 within 2 groups).
|
Suprahyoids: Digastric, Geniohyoid, Mylohyoid, StylohyoidInfrahyoids: Sternohyoid, Omohyoid, Sternothyroid, Thyrohyoid
|
|
Name the four muscles within the group called the suprahyoids
|
Digastric, Geniohyoid, Mylohyoid, Stylohyoid
|
|
Name the four muscles within the group called the infrahyoids
|
Sternohyoid, Omohyoid, Sternothyroid, Thyrohyoid
|
|
Name the origin and insertion of the Digastric muscle (both bellies)
|
Origin of posterior belly: mastoid process of temporal boneInsertion of posterior belly: the hyoid bone Origin of anterior belly: the hyoid boneInsertion of the anterior belly: the digastric fossa of the mandible
|
|
Name the action and innervation of the Digastric muscle (both bellies if different)
|
Action: elevates hyoid or depresses the mandible if the hyoid is held in place by the infrahyoid muscles: Innervation: Anterior belly by the trigeminal (mylohyoid branch)Posterior belly by the facial nerve (posterior digastric branch)`
|
|
Name the origin and insertion of the Sternothyroid muscle
|
Origin: sternumInsertion: thyroid cartilage
|
