ACTIVITY 1

TAGAMTAM, Gian Carla G. - Activity 1

TAGAMTAM, Gian Carla G. - Activity 1

by Gian Carla Tagamtam -
Number of replies: 0

Muscle name

Origin

Insertion

Action

  1. Platysma

Fascia over deltoid and

pectoralis major muscles

Mandible, blends with

muscles around angle of

mouth, and skin of lower

face

Draws outer part of lower lip inferiorly

and posteriorly as in pouting; depresses

mandible.

  1. Mentalis

mandible

Skin of chin

Elevates and protrudes lower lip and

pulls the skin of the chin up, as in pouting.

  1. Orbicularis oris

Muscle fibers surrounding

opening of mouth

Skin at corner of mouth

Closes and protrudes lips, as in kissing;

compresses lips against teeth; and

shapes lips during speech

  1. Corrugator supercilii

Medial end of superciliary

arch of frontal bone

Skin of eyebrow

Draws eyebrow inferiorly and

wrinkles skin of forehead

vertically as in frowning

  1. Orbicularis oculi

Medial wall of orbit

Circular path around orbit

Closes eye

  1. Occipitofrontalis (frontal belly)

Epicranial aponeurosis

Skin superior to

supraorbital margin

Draws scalp anteriorly, raises eyebrows,

and wrinkles skin of forehead

horizontally as in look of surprise