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25 Cards in this Set
- Front
- Back
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Depressor Labii Inferioris innervation
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Facial nerve
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Risorius origin and insertion
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origin: Lateral fascia associated with masseter muscle; insertion: Skin at angle of mouth
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Levator Labii Superioris action
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Opens lips; raises and furrows the upper lip; flares nostril (as in disgust)
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Levator Labii Superioris innervation
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Facial nerve
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Zygomaticus origin and insertion
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origin: Zygomatic bone; insertion: Skin and muscle at corner of mouth
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Risorius action
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Draws corner of lip laterally; tenses lips; synergist of zygomaticus
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Risorius innervation
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Facial nerve
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Orbicularis Oculi origin and insertion
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origin: Frontal and maxillary bones and ligaments around orbit; insertion: Tissue of eyelid
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Zygomaticus action
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Raises lateral corners of mouth upward (smiling muscle)
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Zygomaticus innervation
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Facial nerve
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Corrugator Supercilii origin and insertion
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origin: Arch of frontal bone above nasal bone; insertion: Skin of eyebrow
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Orbicularis Oculi action
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Protects eyes from intense light and injury; various parts can be activated individually; produces blinking, squinting, and draws eyebrows downward; strong closure of eyelids creases skin at lateral aspect of eye (these folds, called “crow’s feet,’’ become permanent with aging)
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Orbicularis Oculi innervation
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Facial nerve
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Occipitalis origin and insertion
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origin: Occipital bone; insertion: Galea aponeurotica
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Corrugator Supercilii action
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Draws eyebrows together; wrinkles skin of forehead vertically (as in frowning)
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Corrugator Supercilii innervation
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Facial nerve
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Frontalis origin and insertion
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origin: Galea aponeurotica; insertion: Skin of eyebrows and root of nose
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Occipitalis action
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Fixes aponeurosis and pulls scalp posteriorly
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Occipitalis innervation
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Facial nerve
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Superficial Transverse Perineus origin and insertion
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origin: Ischial tuberosity; insertion: Central tendon of perineum
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Frontalis action
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With aponeurosis fixed, raises the eyebrows; wrinkles forehead skin horizontally
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Frontalis innervation
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Facial nerve
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Bulbospongiosus origin and insertion
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origin: Central tendon of perineum and midline raphe of male penis; insertion: Anteriorly into corpus cavernosa of penis or clitoris
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Superficial Transverse Perineus action
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Stabilizes and strengthens midline tendon of perineum
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Superficial Transverse Perineus innervation
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Pudental nerve
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