ACTIVITY 1

ANACLETO, Meg Althea U._Activity 1

ANACLETO, Meg Althea U._Activity 1

by Meg Althea Anacleto -
Number of replies: 0

  1. Platysma

    1. Origin: Fascia over deltoid and pectoralis major muscles

    2. Insertion: Mandible, blends with muscles around the angle of the mouth, and skin of lower face

    3. Action: Draws outer part of lip inferiorly and posteriorly (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 (pouting)

  3. Orbicularis oris

    1. Origin: Muscle fibers surrounding opening of mouth

    2. Insertion: Skin at the corner of mouth

    3. Action: Closes and protrudes lips (kissing); compresses lips against teeth; and shapes lips during speech

  4. Corrugator supercilii

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

    2. Insertion: Skin of eyebrows

    3. Action: Draws eyebrow inferiorly and wrinkles skin of forehead vertically (frowning)

  5. Orbicularis oculi

    1. Origin: Medial wall of orbit

    2. Insertion: Circular path around orbit

    3. Action: Closes eye

  6. Frontal belly

    1. Origin: Epicranial aponeurosis 

    2. Insertion: Skin superior to supraorbital margin

    3. Action: Draws scalp anteriorly, raises eyebrows, and wrinkles skin of forehead horizontally (look of surprise)