Term
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Definition
Origin: Galea aponeurotica (scalp)
Insertion: Subcutaneous tissue of eyebrows
Action: Elevates eyebrows in glancing upward and expressions of surprise of fright; draws scalp forward and wrinkles skin of forehead
Innervation: Facial n. |
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Term
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Definition
Origin: Superior nuchal line and temporal bone
Insertion: Galea aponeurotica
Action: Retracts scalp; fixes galea aponeurotica so frontalis can act on eyebrows
Innervation: Facial n. |
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Term
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Definition
Origin: Lacrimal bone, adjacent regions of frontal bone and maxilla, medial angle of eyelids
Insertion: Upper and lower eyelids, skin around margin of orbit
Action: Sphincter of the eyelids; closes eye in blinking, squinting, and sleep; aids in flow of tears across eye
Innervation: Facial n. |
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Term
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Definition
Origin: Medial end of Supraorbital margin
Insertion: Skin of eyebrow
Action: Draws eyebrows medially and downward in frowning and concentration; reduces glare of bright sunlight
Innervation: Facial N. |
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Term
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Definition
Origin: Modiolus of mouth
Insertion: Submucosa and dermis of lips
Action: Facial n.
Innervation: Encircles mouth, closes lips, protrudes lips as in kissing; uniquely developed in humans for speech |
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Term
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Definition
Origin: Zygomatic bone and maxilla near inferior margin of orbit
Insertion: Muscles of upper lip
Action: Elevates and everts upper lip in sad, sneering, or serious expressions
Innervation: |
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Term
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Definition
Origin: Zygomatic bone
Insertion: Superolateral angle of mouth
Action: Draws angle of mouth upward and laterally as in laughing
Innervation: Facial n. |
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Term
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Definition
Origin: Zygomatic bone
Insertion: Muscles of upper lip
Action: Elevates upper lip, exposes upper teeth in smiling or sneering
Innervation: Facial n. |
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Term
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Definition
Origin: Zygomatic arch, fascia near ear
Insertion: Modiolus of mouth
Action: Draws angle of mouth laterally in expressions of laughing, horror, or disdain
Innervation: Facial n. |
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Term
| Depressor Labii Inferioris |
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Definition
Origin: Near mental protuberance
Insertion: Skin and mucosa of lower lip
Action: Draws lower lip downward and laterally in chewing and expressions of melancholy or doubt
Innervation: Facial n. |
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Term
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Definition
Origin: Mandible near inferior incisors
Insertion: Skins of chin at mental protuberance
Action: Elevates and protrudes lower lip in drinking, pouting, and expressions of doubt or disdain; elevates and wrinkles skin of chin
Innervation: Facial n. |
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Term
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Definition
Origin: Alveolar processes on lateral surfaces of maxilla and mandible
Insertion: Orbicularis oris; submucosa of ckeek and lips
Action: Compresses cheek against teeth and gums; directs food between molars; retracts cheek from teeth when mouth is closing to prevent biting cheek; expels air and liquid
Innervation: Facial n. |
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Term
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Definition
Origin: Fascia of deltoid and pectoralis major
Insertion: Mandible; skin and subcutaneous tissue of lower face
Action: Draws lower lip and angle of mouth downward in expressions of horror or surprise; may aid in opening mouth widely
Innervation: Facial n. |
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Term
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Definition
Origin: Temporal lines and temporal fossa of cranium
Insertion: Coronoid process and anterior border of mandibular ramus
Action: Elevation, retraction, and lateral and medial excursion of the madible
Innervation: Mandibular n. |
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Term
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Definition
Origin: Zygomatic arch
Insertion: Lateral surface of mandibular ramus and angle
Action: Elevation of the mandible, with smaller roles in protraction, retraction, and lateral and medial excursion
Innervation: Facial n. |
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Term
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Definition
Origin: Medial surface of lateral pterygoid plate, palatine bone, lateral surface of maxilla near molar teeth
Insertion: Medial surface of mandibular ramus and angle
Action: Elevation, protraction, and lateral and medial excursion of the mandible
Innervation: Mandibular n. |
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Term
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Definition
Origin: Lateral surfaces of lateral pterygoid plate and greater wing of sphenoid
Insertion: Neck of mandible (just below condyle); articular disc and capsule of temporomandibular joint
Action: Depression (in wide opening of the mouth), protraction, and lateral and medial excursion of the mandible
Innervation: Facial n. |
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Term
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Definition
Origin: Sphenoid
Insertion: Eyeball
Action: Eye movement (upward) |
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Term
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Definition
Origin: Sphenoid
Insertion: Eyeball
Action: Eye movement (medial)
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Term
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Definition
Origin: Sphenoid
Insertion: Eyeball
Action: Eye movement (lateral)
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Term
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Definition
Origin: Sphenoid
Insertion: Eyeball
Action: Eye movement (Downward) |
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Term
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Definition
Origin: Sphenoid
Insertion: Eyeball
Action: Eye movement (Downward-Oblique Anlge) |
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Term
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Definition
Origin: Maxilla
Insertion: Eyeball
Action: Eye movement (Upward-Oblique Angle) |
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