Neck Flashcards
Insertion mylohyoid
Mylohyoid raphe and body of hyoid
Origin mylohyoid
Mylohyoid line of mandible
Innervation of mylohyoid
Nerve to mylohyoid
Action of mylohyoid
Elevates hyoid, floor of mouth, and tongue during swallowing and speaking
Origin geniohyoid
Inferior mental spine of mandible
Insertion geniohyoid
Body of hyoid
Innervation of genii ohyoid
C1 via hypoglossal nerve
Action of genii ohyoid
Pulls hyoid anterosuperiorally, shortens floor of mouth, widens pharnyx
Origin stylohyoid
Styloid process of temporal bone
Insertion of stylohyoid
Body of hyoid
Innervation of stylohyoid
Stylohyoid branch of facial nerve
Action of stylohyoid
Elevates and retracts hyoid, thus elongating floor of mouth
Origin of digastric
Anterior belly:digastric fossa of mandible
Posterior belly:mastoid notch of temporal bone
Insertion of digastric
Intermediate tendon to body and greater horn of hyoid
Innervation of digastric
Anterior belly:nerve to mylohyoid
Posterior belly:digastric branch of facial nerve
Action of digastric
Depresses mandible against resistance, elevates and steadies hyoid during swallowing and speaking
Origin sternohyoid
Manubrium of sternum and medial end of clavicle
Insertion of stern ohyoid
Body of hyoid
Innervation of sternohyoid
C1-c3 by a branch of ansa cervicalis
Action of sternohyoid
Depresses hyoid after elevation during swallowing
Omohyoid origin
Superior border of scapula near supra scapular notch
Omohyoid insertion
Inferior border of hyoid
Innervation of omohyoid
C1-c3 by branch of ansa cervicalis
Action of omohyoid
Depresses, retracts and steadies hyoid
Origin of sternothyroid
Posterior surface of manubrium of sternum
Insertion of sternothyroid
Oblique line of thyroid cartilage
Innervation of sternothyroid
C2-c3 by branch. Of ansa cervicalis
Action of sternothyroid
Depresses hyoid and larynx
Origin of thyrohyoid
Oblique line of thyroid cartilage
Insertion thyrohyoid
Inferior border of body and greater horn of hyoid
Innervation of thyrohyoid
C1 via hypoglossal nerve
Action of thyrohyoid
Depresses hyoid and elevates larynx
Occipitofrontalis frontal belly origin
Epicranial aponeurosis
Insertion frontal belly
Skin and subcutaneous tissue of eyebrows and forehead
Action frontal belly
Elevates eyebrows and wrinkles skin of forehead, protracts scalp
Origin occipital belly
Lateral two thirds of superior nuchal line
Insertion of occipital belly
Epicranial aponeourosis
Action of occipital belly
Retracts scalp
Origin orbicularis oculi
Medial orbital margin, medial palpebral ligament, lacrimal bone
Insertion of orbicularis oculi
Skin around margin of orbit
Action of orbicularis oculi
Closes eyelids
Origin orbicularis oris
Medial maxilla and mandible, angle of mouth
Insertion of orbicularis oris
Mucous membrane of lips
Action of orbicularis oris
Tonus closes mouth, phasic contraction compresses and protrudes lips or resist des tension
Origin buccinator
Mandible, alveolar processes of maxilla and mandible
Insertion of buccinator
Angle of mouth, orbicularis oris
Action of buccinator
Presses check against molar teeth
Temporalis innervation
Anterior trunk of mandibular nerve, via deep temporal nerve
Action of temporalis
Elevates mandible, closes jaw
Innervation of masseter
Anterior trunk of mandibular nerve via massetric nerve
Action of masseter
Elevates mandible, superficial fibers contribute to protrusion of mandible
Innervation lateral pterygoid
Anterior trunk of mandibular nerve via nerves to lateral pterygoid
Action of lateral pterygoid
Acting bilaterally, protracts mandible and depresses chin acting unilaterally swings jaw to contra lateral side
Innervation of medial pterygoid
Anterior trunk of mandibular nerve via nerve to me dial pterygoid
Action of medial pterygoid
Acts with masseter to elevate mandible and contributes to protrusion
