ACTIVITY 1

ACTIVITY 1

ACTIVITY 1

by Julianne Ryce Uy -
Number of replies: 0

  1. Platysma

    1. Origin: Fascia over deltoid and pectoralis major muscles

    2. Insertion: Mandible

    3. Action: Depresses outer part of lip inferiorly and posteriorly as in pouting; depresses mandible

  2. Mentalis

    1. Origin: Mandible

    2. Insertion: Skin of chin

    3. Action: Elevates and protrudes lower lip and pulls skin of chin up, as in pouting

  3. Orbicularis oris

    1. Origin: Muscle fibers surrounding mouth opening

    2. Insertion: Skin at corner of mouth

    3. Action: Closes and protrudes lips, as in kissing

  4. Corrugator supercilii

    1. Origin: Medial end of superciliary arch of frontal bone

    2. Insertion: Skin of eyebrow

    3. Action: Draws eyebrows inferiorly and wrinkles skin of forehead vertically, as in frowning

  5. Orbicularis oculi

    1. Origin: Medial wall of orbit

    2. Insertion: Circular path around orbit

    3. Action: Closest eye

  6. Occipitofrontalis

    1. Origin: Epicranial aponeurosis

    2. Insertion: Skin superior to supraorbital margin

    3. Action: Draws scalp anteriorly, raises eyebrows and wrinkles of forehead horizontally, as in look of surprise