Term
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Definition
(Frontalils/frontal belly) Origin: Epicranial aponeurosis Insertion: Skin superior to supraorbital margin Action: Draws scalp anteriorly, raises eyebrow, wrinkles forehead Innervation: Fascial (VII) 7 nerve |
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Term
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Definition
Origin: Occipital bone and mastoid process of temporal bone Insertion: Epicranial aponeurosis Action: Draws scalp posteriorly Innervation: Facial (VII) 7 nerve |
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Term
Zygomaticus Major (cheek bone) (Greater) |
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Definition
Origin: Zygomatic bone Insertion: Skin at angle of mouth and orbicularis oris Action: Draws angle of mouth superiorly and laterally (smile) Innervation: Facial (VII) 7 nerve |
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Term
Zygomaticus Minor (Lesser) |
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Definition
Origin: Zygomatic Bone Insertion: Upper lip Action: Raises upper lip, exposing teeth Innervation: Facial (VII) 7 Nerve |
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Term
Levator labii superioris (raises) (upper) |
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Definition
Origin: Superior to infraorbital foramen of maxilla Insertion: Skin at angle of mouth and orbicularis oris Action: Raises upper lip Innervation: Facial VII Nerve |
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Term
Depressor labii inferioris (lowers) |
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Definition
Origin: Mandible Insertion: Skin of lower lip Action: Depresses (lowers) lower lip Innervation: Facial (VII) Nerve |
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Term
Depressor anguli oris (angle or corner) |
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Definition
Origin: Mandible Insertion: Angle of mouth Action: Draws mouth laterally and inferiorly, as in opening mouth Innervation: Facial (VII) 7 Nerve |
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Term
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Definition
Origin: Inferior to infraorbital foramen Insertion: Skin of lower lip and orbicularis oris. Action: Draws angle of mouth laterally and superiorly Innervation: Facial (VII) 7 Nerve |
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Term
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Definition
Origin: Alveolar processes of maxilla and mandible and pterygomandibular raphe (fibrous band extending from the pterygoid process of the sphenoid bone to the mandible) Insertion: Orbicularis oris (mouth) Action: Whistling, blowing, and sucking; draws mouth laterally; and assists in mastication (chewing) Innervation: Facial (VII) Nerve |
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Term
Risorius (risor = laughter) |
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Definition
Origin: Fascia over parotid (salivary) gland Insertion: Skin at angle of mouth Action: Draws angle of mouth laterally, as in grimacing. Innervation: Facial (VII) 7 Nerve |
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Term
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Definition
Origin: Fascia over deltoid and pectoralis major muscles Insertion: Mandible, muscle around angle of mouth, and skin of lower face. Action: Draws outer part of lower lip inferiorly and posteriorly as in pouting; depresses mandible Innervation: Facial (VII) 7 Nerve |
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Term
Orbicularis oculi (oculi = of the eye) |
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Definition
Origin: Medial wall of orbit Insertion: Circular path around orbit Action: Closes eye Innervation: Facial (VII) 7 nerve |
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Term
Corrugator supercilii (wrinkle) (of the eyebrow) |
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Definition
Origin: medial end of superciliary arch of frontal bone Insertion: skin of eyebrow Action: Draws eyebrow inferiorly and wrinkles skin of forehead vertically as in frowning Innervation: facial (VII) 7 nerve |
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Term
Levator palpebrae superioris (eyelids) |
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Definition
Origin: Roof of orbit (lesser wing of sphenoid bone) Insertion: Skin of upper eyelid Action: Elevates upper eyelid (opens eye) Innervation: Oculormotor (III) Nerve |
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Term
Superior rectus (rectus = fascicles parallel to midline) |
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Definition
Origin: Common tendinous ring (attatched to orbit around optic foramen) Insertion: Superior end and central part of eyeball. (elevate) Action: Moves eyeball superiorly (elevation) and medially (adduction), and rotates it medially. Innervation: Oculomotor (III) Nerve |
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Term
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Definition
Origin: Common tendinous ring (attached to orbit around optic foramen). Insertion: Inferior and central part of eyeball. (depress) Action: Moves eyeball inferiorly (depression) and medially (adduction), and rotates it medially. Innervation: Oculomotor (III) Nerve |
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Term
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Definition
Origin: Common tendinous ring (attached to orbit around optic foramen). Insertion: Lateral side of eyeball (away) Action: Moves eyeball laterally (abduction) Innervation: Abducens (VI)6 Nerve LR6 |
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Term
Medial rectus (moves inferiorly) |
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Definition
(moves inferiorly) Origin: Common tendinous ring (attached to orbit around optic foramen). Insertion: Medial side of eyeball. (toward) Action: Moves eyeball medially. (adduction) Innervation: Oculomotor III Nerve |
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Term
Superior oblique (oblique = fascicles diagonal to midline) |
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Definition
Origin: Sphenoid b one, superior and medial to the tendinous ring in the orbit Insertion: Eyeball between superior and lateral recti. The muscle inserts into the superior and lateral surfaces of the eyeball via a tendon that passes through the trochlea Action: Moves eyeball inferiorly (depression) and laterally (abduction), and rotates it medially. Innervation: Trochlear (IV) 4 Nerve SO4 |
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Term
Inferior Oblique Moves superior |
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Definition
Origin: Maxilla in floor of orbit Insertion: Eyeball between inferior and lateral recti Action: Moves eyeball superiorly (elevation) and laterally (abduction) and rotates it laterally Innervation: Oculomotor (III) Nerve |
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Term
Muscles that move the Mandible (Lower Jaw bone) |
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Definition
Masseter Temporalis Medial pterygoid Lateral pterygoid
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