Muscles of Facial Expression Revision PDF

Muscles of facial expressions 5 Branches of facial nerves Temporal ALL muscles of facial Zygomatic expressions are Buccal innovated by facial Mandibular nerve, and supplied Cervial...

Muscles of facial expressions 5 Branches of facial nerves Temporal ALL muscles of facial Zygomatic expressions are Buccal innovated by facial Mandibular nerve, and supplied Cervial by facial artery. Lie in the subcutaneous fascia. Functions: Divided into; Mouth Show facial Scalp expressions/emotions Neck Eyes Speech Nose Mastication Ears Depending on where they’re situated.  Muscle Origin Insertion Nerve & blood supply Action MOUTH Anterior nasal Elevation/depression Muscles around lips Nerve; facial, buccal branch. Protrusion/ Orbicularis Oris spine & midline Blood; facial, maxillary & compression of lips above chin. superficial temporal arteries. Levator labii Lower rim of orbit Orbicularis Oris Nerve; facial, zygomatic and Elevate upper lip superioris fibres in upper lip buccal. Blood; facial & maxillary arteries. Depressor labii Lowest portion Orbicularis Oris Nerve; facial, mandibular branch Depresses lower lip inferioris of oblique line of fibres in lower lip Blood; facial & maxillary arteries mandible Nerve; facial, buccal and Zygomaticus minor Zygomatic arch Orbicularis Oris; Elevate upper lip zygomatic branches. upper Blood; facial artery. Zygomaticus major Zygomatic arch Orbicularis Oris; at Nerve; facial, buccal and Elevates corners of angle of mouth zygomatic branches. mouth Blood; facial artery. Levator anguli Oris Canine fossa of Orbicularis oris; Nerve; facial, buccal & zygomatic Elevates corners of maxilla corner of mouth branches. mouth Blood; facial & maxillary arteries Depressor anguli Oris Below angle of Orbicularis oris; Depresses corner of Nerve; facial, buccal & mandible corner of mouth mouth mandibular branches. Blood; facial & maxillary arteries  Muscle Origin Insertion Nerve & blood supply Action Mentalis Incisive fossa- Skin covering chin Nerve; facial, mandibular branch Pulls skin of chin up. anterior of Blood; facial & maxillary arteries Aids with clearing food mandible from labial surface. Buccinator Pterygoimandibular Orbicularis oris; Nerve; facial, buccal branch Pulls corners of mouth raphae and buccal corners of mouth Blood; facial & maxillary arteries back. alveolar bone Compresses cheek against molars buccally. Directs food to occlusal surface of molars. Risorius Angle of mandible Orbicularis oris; Nerve; facial, buccal branch Retracts angle of corners of mouth Blood; facial artery mouth; smiling. SCALP Connective tissue Skin; frontal Nerves; facial, temporal branch Pulls scalp up and back Occipitofrontalis of scalp regions of eyebrows Blood; facial, superficial Elevates eyebrows (frontalis) temporal and opthalmic arteries NECK Platysma Clavicle & shoulder Lower border of Nerve; facial, cervical branch Pulls down corners of mandible Blood; facial artery & mouth Skin & muscle of thyrocervial trunk Wrinkles skin on chin lower face and and neck mouth  Muscle Origin Insertion Nerve & blood supply Action EYES Orbial; bone of Horseshoe shape Closes eye forcefully Orbicularis oculi upper medial circuling eye Nerve; facial, zygomatic & orbital margin. temporal branches Blood; superficial temporal, Palpebrae; facial and maxillary arteries Closes eye gently Arches laterally medial palpebral (blinking) within eyelid ligament Corrugator Bridge of nose Skin of lateral part Nerve; facial, temporal branch Pulls eyebrows medially of eyebrow Blood; superficial temporal artery (frown) Procerus Bridge of nose Medial end of Nerve; facial, zygomatic branch Pulls eyebrows down eyebrows Blood; facial artery (frown) Wrinkles nose NOSE Dilator naris; Skin of nostril Flares the nostrils Nosalis nasal margin of Nerve; facial, buccal branches maxilla Blood; facial artery Compressor naris; Midline over Closes the nostrils top of maxillary nasal cartilage canine ridge  Muscle Origin Insertion Nerve & blood supply Action EARS Anterior auricular Scalp and temporal Anterior medial Nerve; facial, temporal branch Pulls ear slightly fascia aspect of helix of Blood; posterior auricular artery forward ear Superior auricular Scalp and temporal Superior medial Nerve; facial, temporal branch Raises the ear fascia aspect of ear Blood; posterior auricular artery Posterior auricular Superior lateral Inferior medial Nerve; facial, temporal branch Pulls ear back aspect of aspect of auricle of Blood; posterior auricular artery mastoid process ear