BIO1410 Muscle Actions PDF

MUSCLE ORIGIN INSERTION ACTION Buccinator maxilla and mandible, orbicularis pterygomandibular oris presses cheeks,...

MUSCLE ORIGIN INSERTION ACTION Buccinator maxilla and mandible, orbicularis pterygomandibular oris presses cheeks, raphe assists in mastication Occipitofrontalisepicranial aponeurosis, skin supocciptal to supraraise bone orbital eyebrows, andmargin, mastoidwrinkle epicranial process skin aponeurosis ofoftemporal forehead, bone draw scalp anteriorly or posteriorly Masseter maxilla and zygomatic angle and bone ramuselevates of mandible mandible (closes mouth) Orbicularis oculimedial wall of orbit circular (frontal/maxillary path around closesorbit bones eye(eyelid) and ligaments) Orbicularis oris muscle fibre surrounding skin at thethe corner mouth closes of (maxilla mouth lips, compresses and mandible) lips against teeth, shapes lips Risorius fascia over parotid skin(salivary at an angle gland) draws of mouth angle of mouth laterally Sternocleidomastoid sternum and clavicle temporal bone and flexoccipital and laterally bonerotate head Temporalis temporal bone mandible elevates and retracts mandible Trapezius occipital bone clavicle, acromion, rotate, spine adduct, of scapula depress, stabilize scapula Zygomaticus major zygomatic bonemouth, orbicularis draws oris angle of mouth superiorly/laterally