ACTIVITY 1

PALERMO, Erica Ann - Activity No. 1

PALERMO, Erica Ann - Activity No. 1

by Erica Ann Palermo -
Number of replies: 0

A pleasant day to everyone in this forum! Here are my answers for the first activity. Thank you!

  1. The muscle that caused the facial expression is the Platysma. It originates in the fascia over the deltoid and pectoralis major muscles. Its insertion is the mandible and it also blends with muscles around the angle of the mouth and skin of the lower face. The platysma acts to generate the expression of pouting by drawing the outer part of the lower lip inferiorly and posteriorly. It can also depress the mandible (Tortora & Derrickson, 2017). 

  1. The muscle that caused the facial expression is the Mentalis. It originates in the mandible and travels in the skin of the chin. The mentalis elevates and protrudes the lower lip and pulls the skin of the chin up making it a pout (Tortora & Derrickson, 2017).

      3. The muscle that caused the facial expression is the Orbicularis oris. It originates in the muscle fibers surrounding the opening of the mouth and travels through the skin at the corner of the mouth. The Orbicularis oris closes and protrudes and compresses lips against teeth as well as shapes lips during speech (Tortora & Derrickson, 2017).

      4. The muscle that caused the facial expression is the Corrugator supercilii. It originates in the medial end of the frontal bone’s superciliary arch. It travels in the skin of the eyebrow. The Corrugator supercilii draws eyebrows inferiorly and wrinkles the skin of the forehead vertically which can be seen when people frown (Tortora & Derrickson, 2017). 

      5. The muscle that caused the facial expression is the Orbicularis oculi. Originating from the medial wall of the orbit; it inserts in the circular path around the said orbit. The Orbicularis oculi act to close the eye (Tortora & Derrickson, 2017).

      6. The muscle that caused the facial expression is the Frontal belly which originates from the epicranial aponeurosis and inserts through the skin superior to the supraorbital margin. The frontal belly draws the scalp anteriorly, raises eyebrows, and wrinkles the skin of the forehead horizontally which in effect, creates an expression of surprise (Tortora & Derrickson, 2017). 

 

Reference: 

Tortora, G. J., & Derrickson, B. (2017). PRINCIPLES OF ANATOMY & PHYSIOLOGY (15th ed.).