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anatomy > muscles of the shoulder > Flashcards

muscles of the shoulder Flashcards

1
Q

trapezius action

A

superior = elevation of scapula
middle = retraction
inferior = depresses scapula
- scapula rotation = abduction and adduction

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2
Q

trapezius innervation

A

accessory nerve - no brachial plexus

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3
Q

levator scapularis action

A

elevates scapula

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4
Q

levator scapularis innervation

A

dorsal scapular nerve - cervical plexus

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5
Q

rhomboid minor/major action

A

retraction of scapula
rotate glenoid cavity

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6
Q

rhomboid minor/major innervation

A

dorsal scapula nerve

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7
Q

serratus anterior action

A

twist, lift and punch action

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8
Q

serratus anterior innervation

A

long thoracic nerve

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9
Q

pectoralis minor action

A

protraction and depression of scapula

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10
Q

pectoralis minor innervation

A

medial pectoral nerve

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11
Q

deltoid action

A

abduction of arm
medial and lateral rotation of arm
aids flexion with pec maj
aids extension with lat dorsi

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12
Q

deltoid innervation

A

axillary nerve

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13
Q

latissimus dorsi action

A

extension
abduction
medial rotation

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14
Q

latissimus dorsi innervation

A

thoracodorsal nerve

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15
Q

rotator cuff muscles

A

Supraspinatus
Infraspinatus
Teres minor
Subscapularis

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16
Q

supraspinatus action

A

supports glenohumeral joint (closer)
abduction
lateral rotation

17
Q

supraspinatus innervation

A

suprascapular nerve

18
Q

infraspinatus action

A

supports glenohumeral joint (brace)
lateral rotation

19
Q

infraspinatus innervation

A

suprascapular nerve

20
Q

teres minor insertion

A

inserts at greater tubercle of humerus

21
Q

teres minor action

A

lateral rotation
supports glenohumeral joint

22
Q

teres minor innervation

A

axillary nerve

23
Q

teres major insertion

A

intertubercular groove of humerus

24
Q

teres major action

A

extension of arm
adduction
medial rotation

25
Q

teres major innervation

A

lower subscapular nerve

26
Q

subscapularis action

A

supports glenohumeral joint
medial rotation
adduction

27
Q

subscapularis innervation

A

upper/lower subscapular nerves

28
Q

pectoralis major action

A

supports glenohumeral joint
medal rotation
adduction

29
Q

pectoralis major innervation

A

med/lat pectoral nerves

30
Q

factors stabilising glenohumeral joint

A

glenoid labrum = fibrous lip round socket = bigger
tendon of biceps brachii = goes up through cavity
fibrous joint capsule
rotator cuff muscles

31
Q

rotator cuff muscles

A

Supraspinatus
Infraspinatus
Teres minor
Subscapularis

anatomy (15 decks)

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