Anterior cervical muscles Flashcards
(32 cards)
Mylohyoid Insertion
Mylohyoid raphe and body of hyoid
Mylohyoid Origin
Mylohyoid line of the mandible
Mylohyoid Innervation
Nerve to Mylohyoid, a branch of inferior alveolar nerve (from mandibular nerve, CN V3)
Mylohyoid actions
Elevates hyoid, floor of mouth and tongue during swallowing and speaking
Geniohyoid Origin
Inferior mental spine of mandible
Geniohyoid Insertion
Body of hyoid
Geniohyoid Innervation
C1 via hypoglossal nerve CN XII
Geniohyoid action
Pulls hyoid anterosuperiorly; shortens floor of mouth; widens pharynx
Stylohyoid Origin
Styloid process of temporal bone
Stylohyoid Insertion
Body of hyoid
Stylohyoid innervation
Stylohyoid branch of facial nerve CN VII
Stylohyoid action
Elevates and retracts hyoid, thus elongating floor of mouth
Digastric origin
Anterior belly: Digastric fossa of mandible
Posterior belly: Mastoid notch of temporal bone
Digastric Insertion
Intermediate tendon to body and greater horn of hyoid
Digastric innervation
Anterior belly: nerve to mylohyoid, a branch of inferior alveolar nerve
Posterior belly: Digastric branch of fascial nerve CN VII
Digastric action
Working with infrahyoid muscles, depresses mandible against resistance; elevates and steadies hyoid during swallowing and speaking
Sternohyoid Origin
Manubrium of sternum and medial end of clavicle
Sternohyoid Insertion
Body of hyoid
Sternohyoid innervation
C1-C3 by a branch of Ansa cervicalis
Sternohyoid action
Depresses hyoid after elevation during swallowing
Omohyoid Origin
Superior border of scapula near suprascapular notch
Omohyoid insertion
Inferior border of hyoid
Omohyoid innervation
C1-C3 by a branch of ansa cervicalis
Omohyoid Action
Depresses, retracts, and steadies hyoid
