ACTIVITY 1

TAN, Alyssa Mariz P. - Activity 1

TAN, Alyssa Mariz P. - Activity 1

by Alyssa Mariz Tan -
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 the lower face.

    3. Action: Draws outer part of lower 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 the skin of chin up, as in pouting.

  3. Orbicularis Oris

    1. Origin: Muscle fibers surrounding the opening of the mouth

    2. Insertion: Skin at the corner of the mouth

    3. Action: Closes and protrudes lips, as in kissing; compresses lips against teeth, and shapes lips during speech

  4. Corrugator Supercilii

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

    2. Insertion: Skin of the eyebrow

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

  5. Orbicularis Oculi

    1. Origin: Medial wall of the orbit 

    2. Insertion: Circular path around the orbit

    3. Action: Closes the eye

  6. Occipitofrontalis

    1. Origin: Epicranial aponeurosis

    2. Insertion: Skin superior to supraorbital margin

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