MUSCLE OIA Flashcards
Submentalis Origin
Anterior tip of the mandible
Submentalis Insertion
Anterior angle of the lower jaw
Submentalis Action
Raises the tip of the lower jaw
Mylohyoid Origin
Median surface of the mandible
Mylohyoid Insertion
Median raphe
Mylohyoid Action
Raises the floor of the mouth during breathing or swallowing
Geniohyoid Origin
Anterior angle of the lower jaw
Geniohyoid Insertion
Posterior cornua and thyroid processes of the hyoid
Geniohyoid Action
Draws the hyoid forward and upward
Sternoradialis Origin
Episternum and omosternum
Sternoradialis Insertion
Proximal end of the radius
Sternoradialis Action
Flexes the forearm
Cutaneous pectoralis Origin
Xiphisternum; from the anterior margin of the sheath that covers the rectus abdominis
Cutaneous pectoralis Insertion
Dermis of the skin at the pectoral region
Cutaneous pectoralis Action
Tenses the skin that overlies the pectoral girdle
Pectoralis Origin
Sternum
Pectoralis Insertion
Humerus
Pectoralis Action
Flexor, adductor, and rotator of the arm
Rectus abdominis Origin
Pubic border
Rectus abdominis Insertion
Sternum
Rectus abdominis Action
Support the abdominal viscera; hold the sternum in place
External oblique Origin
Ilium; dorsal fascia of vertebrae
External oblique Insertion
Linea alba
External oblique Action
Help constrict the abdomen; support the viscera