Muscular system

By the end of this session you will be able to: Name the main facial muscles Identify the position and action of facial muscles Label a facial muscle diagram

Frontalis Position forehead Action raises the eyebrows

Corrugator Position Action eyebrows draws the eyebrows together

Position Action temple region raises lower jaw, mastication

Orbicularis occuli Position Action around the eyes controls eyelid movement

Nasalis Position Action sides of the nose/nostrils controls movement of nostrils

Procerus Position Action bridge of the nose wrinkles the skin on the nose

Lavator labii superioris Position Action radiates from upper lip lifts upper lip

Zygomaticus Position Action across the cheek lifts the corner of the lip

Masseter Position Action side of the cheeks mastication

Buccinator Position across the cheek Action compresses cheeks

Risorius Position either side of mouth Action grinning

Depressor anguli oris Position radiates from lower lip Action pulls the corners of the mouth down

Depressor labii inferioris Radiates from lower lip Pushes the lower lip out and up Position Action

Mentalis Middle of chin Raises and protrudes lower lip Position Action

Orbicularis oris Around the lips Controls lip movement Position Action

Platysma Front of neck Pulls lower jaw down Position Action

Sterno cleido mastoid Sides of the neck Moves head side to side Position Action

Pectoralis Chest muscle Adducts arms Position Action

Deltoid Caps the shoulder Abducts arms Position Action

Trapezius Upper back Pulls the scapula back, pulls the head back Position Action

Digastric Position Action Floor of mouth/under the jaw Depresses the mandible

Name the muscle which: Raises the eyebrows Purses the lips-whistling Draws the corners of the lips out Pushes the lower lip up and out Draws the eyebrows together Compresses the cheeks Tenses the neck