ACTIVITY 1

GUTIERREZ, Nathalie Bianca V. - Activity 1

GUTIERREZ, Nathalie Bianca V. - Activity 1

by Nathalie Bianca Gutierrez -
Number of replies: 0

  1. Muscle: Platysma

    1. Origin: Fascia over deltoid and pectoralis major muscles

    2. Insertion: mandible, muscles around the angle of mouth, and lower face

    3. Action: draws outer part of lower lip; depresses mandible 

  2. Muscle: Mentalis

    1. Origin: mandible

    2. Insertion: skin of chin

    3. Action: elevates and protrudes lower lip and pulls skin of chin

  3. Muscle: Orbicularis oris

    1. Origin: opening of mouth

    2. Insertion: skin at corner of mouth

    3. Action: closes and protrudes lips; compresses lips against teeth; shapes lips

  4. Muscle: Corrugator supercilii

    1. Origin: medial end of the external surface of frontal bone

    2. Insertion: skin of eyebrow

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

  5. Muscle: Orbicularis oculi

    1. Origin: medial wall of orbit

    2. Insertion: circular path around orbit

    3. Action: closes eye

  6. Muscle: Frontal belly (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 (surprised)