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A&P 1 > AP1 Muscle Functions > Flashcards

AP1 Muscle Functions Flashcards

1
Q

Frontalis

A

raises eyebrows/ wrinkles forehead

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2
Q

Occipitalis

A

tenses / retracts scalp

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3
Q

Orbicularis Oculi

A

closes eye

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4
Q

Orbicularis Oris

A

Closes lips (whistling)

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5
Q

Zygomaticus Major & Minor

A

Draw corners of mouth upward (smiling)

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6
Q

Platysma

A

Tenses skin of neck

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7
Q

Masseter

A

elevates mandible, closes jaw

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8
Q

Temporalis

A

raises & retracts mandible

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9
Q

Sternocleidomastoid

A

(Ips): turns head toward shoulders of opposite side
(Bil): neck FLEXION

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10
Q

Quadratus Lumborum

A

Ips: Lateral FLEXION of trunk
Bil: Lateral stability to vertebral column, stabilizes 12th rib during inspiration

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11
Q

Erector Spinae

A

Consists of 3 muscles: Iliocostalis, Longissimus, Spinalis
Function: Posture/support spine: laterally FLEXION of spine

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12
Q

Rectus Abdominis

A

Trunk FLEXION. depresses ribs/ upwardly rotates pelvis

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13
Q

External Oblique

A

Ips: Trunk ROTATION to opposite side, lateral FLEXION of trunk to same side
Bil: FLEXION of trunk

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14
Q

Internal Oblique

A

Ips: ROTATION of trunk to same side & lateral FLEXION of trunk to same side.
Bil: FLEXION of trunk

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15
Q

Transversus Abdominis

A

Compresses abdominal contents

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16
Q

External Intercostals

A

Elevate rib cage/ Inspiration

17
Q

Internal Intercostals

A

Depress rib cage/ exhalation

18
Q

Diaphragm

A

contracts to pull central tendon inferior & increase superior-inferior thoracic cavity dimensions

19
Q

Trapezius

A

Elevates, depresses, rotates, retracts, stabilizes scapula

20
Q

Rhomboid Major & Rhomboid Minor

A

ADDUCTS, stabilizes, rotates scapula downward

21
Q

Latissimus Dorsi

A

Extends shoulder joint, ADDUCTS and ROTATES humerus medially, depresses and rotates scapula downward

22
Q

Pectoralis Major

A

Flexes shoulder joint, ADDUCTS and rotates humerus medially

23
Q

Pectoralis Minor

A

Depresses scapula down (protracts & stabilizes)

24
Q

Serratus Anterior

A

Rotates scapula up (stabilizes & protracts)

25
Q

Supraspinatus

A

ABDUCTS humerus (60 degrees max)

26
Q

Infraspinatus

A

Lateral ROTATION of humerus , slight ADDUCTION

27
Q

Teres Minor

A

Lateral ROTATION of Humerus, slight adduction

28
Q

Teres Major

A

Extends shoulder joint. ADDUCTS and medially rotates humerus

29
Q

Deltoid

A

ABDUCTS humerus,
Anterior Fibers: FLEX shoulder joint , rotate humerus medially
Posterior Fibers: EXTEND shoulder joint & laterally rotate humerus
Middle Fibers: Pure abductors

A&P 1 (6 decks)

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