Facial and Neck Muscles Flashcards

1
Q

Occipitalis

A

overlies occipital and part of the temporal bone. Fixes aperneurosis and pulls scalp posteriorly

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2
Q

Frontalis

A

covers forehead and dome of skull. elevates the eyebrows -wrinkles forehead skin horizontally

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3
Q

Orbicularis Oculi

A

Sphincter muscle of eyelid. surround rim of orbit.Closes the eye, produces blinking and squinting

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4
Q

Zygomaticus

A

muscle pair extending diagonally from cheekbone to corner of mouth. Smiling muscle, raises lateral corners of the mouth

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5
Q

Orbicularis Oris

A

multilayered muscle, most run circularly around the mouth. Closes the lips, purses, kissing, and whistling

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6
Q

Mentalis

A

V shaped muscle pair on chin. Wrinkle chin

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7
Q

Platysma

A

unpaired thin sheet like muscle over the neck. tenses skin of neck, used in shaving

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8
Q

Levator labii superioris

A

muscle b/n orbicularis oris and inferior eye margin. Opens lips, elevates upper lip

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9
Q

Depressor Labii inferioris

A

small muscle running from mandible to lower lip. depresses lower lip

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10
Q

Buccinator

A

principle muscle of the cheek and deep to masseter. compresses cheek for sucking and whistling

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11
Q

Masseter

A

Powerful muscle that covers lateral aspect of ramus of mandible. closes jaw, elevates mandible $

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12
Q

Temporalis

A

fan shaped covers part of the temporal, frontal and parietal bones. Closes jaw, elevates and retracts mandible $

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13
Q

Medial and lateral pterygoid

A

deep two headed muscle that runs along internal surface of mandible and is largely concealed by the pterygoid bone. protract mandible and grinding movements

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14
Q

Genioglossus

A

fan shaped muscle bulk of inferior part of tongue. protracts tongue

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15
Q

Digastric

A

consists of two bellies united by an intermediate tendon, forming a V shape under the chin, one origin on chin one origin on mastoid insertion on the hyoid bone where it meets. Open mouth and depress mandible.

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16
Q

Stylohyoid

A

parallels posterior bellies of digastric muscle, laterally, styloid process to hyoid bone. elevates and retracts hyoid.

17
Q

Mylohyoid

A

flat triangular muscle deep to the digastric, floor of anterior mouth, runs along the mandible to the hyoid bone. elevates hyoid bone and floor of mouth

18
Q

Geniohyoid

A

narrow muscle runs from chin to hyoid bone deep to mylohyoid. elevates and protractes the hyoid

19
Q

Sternohyoid

A

most medial of the neck, thin partially covered by sternocleidomastoid, from sternum/clavicle to hyoid bone. depresses larynx and hyoid bone

20
Q

Sternothyroid

A

b/n sternum and thyroid cartilage. depresses larynx and thyroid cartilage

21
Q

Omohyoid

A

straplike muscle with two bellies united by an intermediate tendon, lateral to sternohyoid, covered partially by sternocleidomastoid. depresses and retracts hyoid bone

22
Q

Thyrohyoid

A

appears as suppra continuation of sternothyroid muscle, b/n thyroid cartilage and hyoid bone. depresses hyoid bone or elevates the larynx

23
Q

Sternocledomastoid

A

two headed deep to platysma, anterolateral surface of the neck. flexes and laterally rotates the head $

24
Q

Scalenes

A

located laterally on the neck, deep to platysma and sternocleidomastoid. Elevates first two ribs, flex and rotate the neck

25
Q

Splenius

A

Broad bipartite superficial muscle, extending from upper thoracic vertebrae to skull. extend the head

26
Q

Erector Spinae

A

Prime movers of back extension. Provides for proper spine curvature

27
Q

Semispinalis

A

extends from thoracic region to head in the back, deep to trapezius. extend vertebral column and head, rotates them to opposite sides

28
Q

Corrugator

A

small muscle to eyebrow, acts with orbiculares oculi. draws eyebrows medially and inferiorly.

29
Q

Risorious

A

slender muscle inferior to the zygomaticus. draws corners of lips laterally

30
Q

Levator Palpebrae Superioris

A

anterior to posterior roof of the orbit. Lifter of the upper eyelid.

31
Q

Trapezius

A

flat triangular superficial muscle of the upper thorax. stabilizes, elevates, retracts, and rotates the scapula $