Muscles - Head & Ventral Neck Flashcards by Spencer Swayne

Q

Sternocleidomastoid (s) insertion

A

Mastoid process

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Q

Sternocleidomastoid (s) origin

A

Sternum & clavicle

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Q

Sternocleidomastoid (s) action

A

Rotates head laterally, flexes head

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Q

Masseter (s) origin

A

Zygomatic arch

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Q

Masseter (s) insertion

A

Lateral mandible

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Q

Masseter (s) action

A

Elevates jaw

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Q

Temporalis (s) origin

A

Temporal bone

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Q

Temporalis (s) insertion

A

Mandible

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Q

Temporalis (s) action

A

Elevates jaw

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Q

Sternohyoid origin

A

Manubrium & clavicle

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Q

Sternohyoid insertion

A

Hyoid bone

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Q

Sternohyoid action

A

Depress larynx; flex skull

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Q

Mylohyoid origin

A

Mandible

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Q

Mylohyoid insertion

A

Hyoid bone

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Q

Mylohyoid action

A

Elevates floor of mouth

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Q

Digastric origin

A

Mandible & mastoid process

Q

Digastric insertion

A

Hyoid bone

Q

Digastric action

A

Elevate hyoid

Q

Frontalis origin

A

Frontal bone

Q

Frontalis insertion

A

Skin of eyebrow and root of nose

Q

Frontalis action

A

Raises eyebrow and wrinkles forehead

Q

Orbicularis oculi origin

A

Frontal and maxillary bones

Q

Orbicularis oculi insertion

A

Tissue of eyelids

Q

Orbicularis oculi action

A

Involved in blinking, squinting, and protects eye from injury

Orbicularis oris origin

Maxilla and mandible

Orbicularis oris insertion

Muscles and skin at angles of mouth

Orbicularis oris action

Closes lips, kissing and whistling

Mentalis origin

Mandible

Mentalis insertion

Skin of chin

Mentalis action

Protrudes lower lip, wrinkles chin

Platysma origin

Fascia of chest

Platysma insertion

Mandible

Platysma action

Depresses mandible