Muscles Of The Head Part II Flashcards
Insertion of masseter
Angle and ramus of mandible
Origin of masseter
Zygomatic arch and zygomatic bone
Action of masseter
Prime mover of jaw closure
Innervation of masseter
Mandibular branch of trigeminal nerve
Origin of Temporalis
Temporal fossa
Insertion of Temporalis
Coronoid process of mandible via a tendon that passes deep to zygomatic arch
Action of Temporalis
Closes jaw
Innervation of Temporalis
Mandibular branch of trigeminal nerve
Origin of medial pterygoid
Medial surface of lateral pterygoid plate of sphenoid bone, maxilla, and palatine bone
Insertion of medial pterygoid
Medial surface of mandible near its angle
Action of medial pterygoid
Acts with lateral pterygoid muscle to protract mandible and to promote side-to-side (grinding) movements
Innervation of medial pterygoid
Mandibular branch of trigeminal nerve
Origin of lateral pterygoid
Greater wing and lateral pterygoid plate of sphenoid bone
Insertion of lateral pterygoid
Condylar process of mandible and capsule of temporomandibular joint
Action of lateral pterygoid
Provides forward sliding and side-to-side grinding movements of the lower teeth
Innervation of lateral pterygoid
Mandibular branch of trigeminal nerve
Origin of genioglossus
Internal surface of mandible near symphysis
Insertion of genioglossus
Inferior aspect of the tongue and body of hyoid bone
Action of genioglossus
Primarily protracts tongue
Innervation of genioglossus
Hypoglossal nerve
Insertion of hyoglossus
Inferolateral tongue
Action of hyoglossus
Depresses tongue
Innervation of hyoglossus
Hypoglossal nerve
Origin of styloglossus
Styloid process of temporal bone
Insertion of styloglossus
Lateral inferior aspect of tongue
Action of styloglossus
Retracts and elevates tongue
Innervation of styloglossus
Hypoglossal nerve
Origin of hyoglossus
Body and greater horn of hyoid bone
