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CLINICALS > Shoulder Muscle Actions + Innervations > Flashcards

Shoulder Muscle Actions + Innervations Flashcards

1
Q

supraspinatus innervation

A

suprascapular nerve (C5-C6)

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2
Q

supraspinatus action

A

shoulder abduction
+ stabilization

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3
Q

infraspinatus innervation

A

suprascapular nerve (C5-C6)

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4
Q

infraspinatus action

A

shoulder external rotation + stabilization

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5
Q

teres minor innervation

A

axillary nerve (C5-C6)

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6
Q

teres minor action

A

shoulder external rotation + stabilization

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7
Q

teres major innervation

A

lower subscapular nerve (C5-C6)

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8
Q

teres major action

A

shoulder adduction, internal rotation, and external rotation

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9
Q

triceps brachii innervation

A

radial nerve (C6-C8)

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10
Q

triceps brachii action

A

long head: shoulder extension + adduction
all: elbow extension

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11
Q

latissimus dorsi innervation

A

thoracodorsal nerve (C6-C8)

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12
Q

latissimus dorsi action

A

shoulder extension, internal rotation, and external rotation

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13
Q

deltoid innervation

A

axillary nerve (C5-C6)

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14
Q

deltoid action

A

shoulder flexion, extension, aduction, internal rotation, and external rotation

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15
Q

subclavius innervation

A

subclavian nerve (C5-C6)

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16
Q

subclavicus action

A

depression of clavicle

17
Q

sternocleidomastoid innervation

A

spinal accessory nerve (CN XI)

18
Q

sternocleidomastoid action

A

shoulder + thorax elevation

19
Q

pectoralis major innervation

A

lateral pectoral nerve (C5-C7) + medial pectoral nerve (C8-T1)

20
Q

pectoralis major action

A

shoulder flexion, adduction, and internal rotation

21
Q

pectoralis minor innervation

A

medial pectoral nerve (C8-T1)

22
Q

pectoralis minor action

A

depression + anterior tilt of scapula, elevates ribs

23
Q

biceps brachii innervation

A

musculocutaneous nerve (C5-C6)

24
Q

biceps brachii action

A

shoulder flexion
elbow flexion
forearm supination
shoulder adduction

25
Q

coracobrachialis innervation

A

musculocutaneous nerve (C5-C7)

26
Q

coracobrachialis action

A

shoulder flexion
shoulder adduction

27
Q

subscapularis innervation

A

upper + lower subscapular nerves (C5-C6)

28
Q

subscapularis action

A

shoulder adduction + internal rotation

CLINICALS (17 decks)

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