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Muscles of the face Muscle Frontalis Obicularis Oculi Zygomatic Major / Minor Platysma Mentalis Massater Buccinator Obicularis oris Sternocleidomastoid Risoris Temporalis Levator Labii Superior Action Draws scalp forward, Raises eyebrows Wrinkles skin of forehead horizontally, horror Closes Eyes Draws angle of mouth upwards and outwards, as in smiling or laughing Draws outer part of lower lip downwards and backwards as in pouting, annoyance depresses mandible Wrinkles chin, doubt , pouting Closes mouth, Chewing Compresses cheek , Blowing and Sucking Closes lips, Compresses lips against teeth, protrudes lips and shapes lips during speech whistling and kissing Nodding of the head Pulls side wards , grinning Elevates and retracts mandible side to side Movement of mandible Elevates and everts the upper lip Depressor Labii Inferioris Nasalis Draws lower lips inferior and laterally Depressor Anguli oris Corrugator Frontal bone medial margin of orbit Occipital belly Digastric Trapesius Splenius capitis Peterygoid Draws angle of mouth inferiorly and laterally during opening Medial Petergoid Deltoid Levator Scapulae Scalenes Pectoralis Major / minor Dilates the nostrils lateral Lateral slip elevates and everts upper lip Frowning Vertically arranged wrinkles of skin overlying forehead Draws skin of scalp backwards Depresses mandible , can elevate hyoid Retracts scapula Tilts head towards shoulder Pulls TMJ forward assists in opening mouth Side to side movement of mandible ,protrudes mandible Protrudes and assists elevate mandible Anterior fibres –Flex and medially rotates humerus Middles fibres -Abducts Humerus Posterior fibres - Extends and laterally rotates humerus Elevates scapulae Elevates ribs and flexes vertebral column Flexes shoulder joint depresses girdle adducts and rotates humerus Frances Daly MSc IISSM