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PHARM 110 > Muscles crossing the Shoulder Joint > Flashcards

Muscles crossing the Shoulder Joint Flashcards

1
Q

Pectoralis major (PM)

A

O: clavicle, sternum, ribs 1-6, and external oblique
I: humerus

PM for shoulder adduction
flexion -> clavicular part, extension -> sternal part

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2
Q

Deltoid (PM)

A

O: clavicle and scapula
I: humerus

PM for arm abduction; also flexion and extension
flexion, medial rotation -> anterior fibers
extension, lateral rotation -> posterior fibers

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3
Q

Latissimus dorsi (PM)

A

O: iliac crest, lumbar & thoracic vertebrae, lower 3-4 ribs, and scapula
I: humerus

PM for arm extension and adduction

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4
Q

Subscapularis (PM)

A

O: scapula
I: humerus

PM for medial rotation

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5
Q

Supraspinatus

A

O: scapula
I: humerus

abduction

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6
Q

Infraspinatus (PM)

A

O: scapula
I: humerus

PM for lateral rotation

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7
Q

Teres minor (PM)

A

O: scapula
I: humerus

also PM for lateral rotation

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8
Q

Teres major

A

O: scapula
I: humerus

extension, medial rotation, and adduction
synergist of latissimus dorsi

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9
Q

Coracobrachialis

A

O: scapula
I: humerus

flexion and adduction
synergist of pectoralis major

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PHARM 110 (11 decks)

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