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Muscles of the Human Body! Head and Neck. Frontalis Raises eyebrows, wrinkles forehead.

Date post: 03-Jan-2016
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Muscles of the Human Body! Head and Neck
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Page 1: Muscles of the Human Body! Head and Neck. Frontalis Raises eyebrows, wrinkles forehead.

Muscles of the Human Body!

Head and Neck

Page 2: Muscles of the Human Body! Head and Neck. Frontalis Raises eyebrows, wrinkles forehead.

FrontalisRaises eyebrows, wrinkles forehead

Page 3: Muscles of the Human Body! Head and Neck. Frontalis Raises eyebrows, wrinkles forehead.

OccipitalisTenses and retracts scalp (moves it back)

Page 4: Muscles of the Human Body! Head and Neck. Frontalis Raises eyebrows, wrinkles forehead.

Orbicularis OculiBlinking of eye; squinting; draws eyebrows down

Page 5: Muscles of the Human Body! Head and Neck. Frontalis Raises eyebrows, wrinkles forehead.

ZygomaticusRaises lateral corners of mouth upwards; smiling

muscle

Page 6: Muscles of the Human Body! Head and Neck. Frontalis Raises eyebrows, wrinkles forehead.

RisoriusDraws corner of lip laterally; synergist of

zygomaticus

Page 7: Muscles of the Human Body! Head and Neck. Frontalis Raises eyebrows, wrinkles forehead.

Levator Labii SuperiorisElevates upper lip

Page 8: Muscles of the Human Body! Head and Neck. Frontalis Raises eyebrows, wrinkles forehead.

Depressor Labii InferiorisDraws lower lip downward, as in a pout

Page 9: Muscles of the Human Body! Head and Neck. Frontalis Raises eyebrows, wrinkles forehead.

Depressor Anguli OrisDraws corners of mouth downwards and

laterally (“tragedy mask” grimace)

Page 10: Muscles of the Human Body! Head and Neck. Frontalis Raises eyebrows, wrinkles forehead.

Orbicularis OrisCloses Lips; purses and protrudes lips; kissing

and whistling muscle

Page 11: Muscles of the Human Body! Head and Neck. Frontalis Raises eyebrows, wrinkles forehead.

MentalisProtrudes lower lip; wrinkles chin

Page 12: Muscles of the Human Body! Head and Neck. Frontalis Raises eyebrows, wrinkles forehead.

BuccinatorCompresses cheek, as in

whistling and sucking, well developed in nursing infants. Holds food between teeth during chewing

Page 13: Muscles of the Human Body! Head and Neck. Frontalis Raises eyebrows, wrinkles forehead.

Platysma• Helps depress

mandible; pulls lower lip back and down (produces downward sag of mouth; tenses skin of neck (during shaving)

Page 14: Muscles of the Human Body! Head and Neck. Frontalis Raises eyebrows, wrinkles forehead.

Platysma

Page 15: Muscles of the Human Body! Head and Neck. Frontalis Raises eyebrows, wrinkles forehead.

MasseterPrime mover of jaw closure; Elevates mandible

Page 16: Muscles of the Human Body! Head and Neck. Frontalis Raises eyebrows, wrinkles forehead.

TemporalisSynergist to masseter; Elevates mandible

Page 17: Muscles of the Human Body! Head and Neck. Frontalis Raises eyebrows, wrinkles forehead.

DigastricOpen mouth (depress mandible); elevates hyoid

Page 18: Muscles of the Human Body! Head and Neck. Frontalis Raises eyebrows, wrinkles forehead.

Sternocleidomastoid

Prime mover of active head flexion; generally against resistance as when one raises head when lying on their back. Acting alone: each muscle rotates head toward shoulder on opposite side and tilts (laterally flexes) head to its own side.

Page 19: Muscles of the Human Body! Head and Neck. Frontalis Raises eyebrows, wrinkles forehead.

Sternocleidomastoid

Page 20: Muscles of the Human Body! Head and Neck. Frontalis Raises eyebrows, wrinkles forehead.

Scalenes

Elevates first two ribs (aids in inspiration). Flex and rotate neck

Page 21: Muscles of the Human Body! Head and Neck. Frontalis Raises eyebrows, wrinkles forehead.

Splenius – Capitis & Cervicis• Act as a group to extend or hyperextend the

head. When active on one side, head is rotated and bent laterally toward the same side

Splenius Capitis Splenius

Cervicis


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