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Muscles of Facial Expression
N/A
27
Biology
Undergraduate 1
11/15/2013

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Term
Frontalis - Origin
Definition
Galea aponeurotica
Term
Frontalis - Insertion
Definition
Subcutaneous tissue of eyebrows
Term
Frontalis - Action
Definition
Elevate eyebrows; Draw scalp forward
Term
Occipitalis - Origin
Definition
Superior nuchal line of occipital; Temporal bone
Term
Occipitalis - Insertion
Definition
Galea aponeurotica
Term
Occipitalis - Action
Definition
Retract scalp
Term
Orbicularis oculi - Origin
Definition
Lacrimal bone; Adjacent frontal bone and maxilla
Term
Orbicularis oculi - Insertion
Definition
Upper and lower eyelids; Skin around margin of orbit
Term
Orbicularis oculi - Action
Definition
Close eyes
Term
Orbicularis oris - Origin
Definition
Modiolus of mouth
Term
Orbicularis oris - Insertion
Definition
Submucosa, dermis of lips
Term
Orbicularis oris - Action
Definition
Close, protrude lips
Term
Zygomaticus major - Origin
Definition
Anterior zygomatic bone
Term
Zygomaticus major - Insertion
Definition
Superolateral angle of mouth
Term
Zygomaticus major - Action
Definition
Draw angle of mouth upward and laterally
Term
Risorius - Origin
Definition
Zygomatic arch
Term
Risorius - Insertion
Definition
Modiolus of mouth
Term
Risorius - Action
Definition
Draw angle of mouth laterally
Term
Mentalis - Origin
Definition
Mandible near inferior incisors
Term
Mentalis - Insertion
Definition
Skin of chin
Term
Mentalis - Action
Definition
Elevate, protrude lower lip
Term
Buccinator - Origin
Definition
Lateral alveolar processes on mandible and maxilla
Term
Buccinator - Insertion
Definition
Orbicularis oris; Submucosa of cheek and lips
Term
Buccinator - Action
Definition
Compress cheek against teeth and gums; Retract cheek from teeth
Term
Platysma - Origin
Definition
Fascia of deltoid and pectoralis major
Term
Platysma - Insertion
Definition
Mandible; Skin and subcutaneous tissue of lower face
Term
Platysma - Action
Definition
Draw lower lip and angle of mouth down; Open mouth widely
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