Muscle Actions 1 Flashcards

1
Q

Frontalis

A

Raises eyebrows

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2
Q

Orbicularis oculi

A

Moves eyelids

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3
Q

Zygomaticus

A

Smiles

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4
Q

Buccinator

A

Sucks cheeks in, pulls mouth wide

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5
Q

Orbicularis oris

A

Closes mouth and kissing

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6
Q

Mentalis

A

Pouting

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7
Q

Platysma

A

Lowers mandible and pulls corners of mouth down

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8
Q

Temporalis

A

Closes and retracts jaw

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9
Q

Masseter

A

Closes jaw and elevates mandible

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10
Q

Stereocleidomastoid

A

Bilaterally - flexion of neck unilaterally - flexion of neck to same side and rotation to opposite side

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11
Q

Splenius capitis & cervicis

A

Extend and laterally flex spine

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12
Q

Erector spinae

A

Extend and laterally flex spine

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13
Q

Quadratus lumborum

A

Laterally flex spine and extend lumbar spine and maintain upright posture

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14
Q

External intercostal

A

Inspiration

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15
Q

Internal intercostal

A

Expiration

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16
Q

Diaphragm

A

Flattens to create a vacuum for inspiration

17
Q

Rectus Abdominus

A

Flexes and rotates vertebrae, flexes ribs & stabilizes pelvis

18
Q

External and internal oblique

A

Trunk rotation and flexion

19
Q

Transverse Abdominus

A

Compresses abdominal contents

20
Q

Levator ani and coccygeus

A

Support pelvic viscera

21
Q

Pectoralis major

A

Arm flexion, adduction, medially rotates arm and raises chest

22
Q

Pectoralis minor

A

Draws ribs superiorly or scapula inferiorly

23
Q

Serratus anterior

A

Rotates scapula, abducts and raises arm

24
Q

Deltoid

A

Arm abduction, assists in flexion, extension and rotation

25
Q

Trapezius

A

Extend head, raises and retracts scapula, shrugs shoulders

26
Q

Rhomboid

A

Retracts scapula

27
Q

Latissimus dorsi

A

Arm extension, adduction, medial rotation, depresses scapula

28
Q

Teres major

A

Extend, medially rotate and adducts humerus

29
Q

Subscapularis

A

Medially rotates humorous and stabilizes shoulders

30
Q

Infraspinatus

A

Laterally rotates humorous and stabilizes shoulders

31
Q

Teres minor

A

Laterally rotates humorous and stabilizes shoulders

32
Q

Supraspinatus

A

Abducts humerus and stabilizes shoulders