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Anatomy > Posterior Shoulder > Flashcards

Posterior Shoulder Flashcards

1
Q

Deltoid: Origin

A

Lateral 1/3 of clavicle, Acromion, spine of scapula

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2
Q

Deltoid: Insertion

A

Deltoid tuberosity

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3
Q

Deltoid: Innervation

A

Axillary nerve (C5, C6)

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4
Q

Deltoid: Action

A

Clavicular: medial rotation, flexion
Acromial: abduction
Spinal: lateral rotation, extension

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5
Q

Deltoid: Arterial supply

A

Thoracoacromial artery, anterior + posterior circumflex humeral artery, and circumflex scapular artery

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6
Q

Teres major: Origin

A

Inferior part of lateral border of scapula
Posterior Surface of the inferior angle

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7
Q

Teres major: Insertion

A

Medial lip of intertubercular sulcus

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8
Q

Teres major: Innervation

A

Lower subscapular nerve (C5, C6)

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9
Q

Teres major: Action

A

Medial rotation and adduction

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10
Q

Teres major: Arterial supply

A

Subscapular + posterior circumflex humeral, and circumflex scapular artery

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11
Q

Teres minor: Origin

A

Lateral border of scapula

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12
Q

Teres minor: Insertion

A

Middle facet of the greater tubercle

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13
Q

Teres minor: Innervation

A

Axillary nerve (C5, C6)

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14
Q

Teres minor: Action

A

Lateral rotation and stability of joint

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15
Q

Teres minor: Arterial supply

A

Subscapular artery, circumflex scapular artery, and posterior circumflex humeral artery

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16
Q

Subscapularis: Origin

A

Subscapular fossa

17
Q

Subscapularis: Insertion

A

Lesser tubercle

18
Q

Subscapularis: Innervation

A

Upper and lower subscapular nerves (C5, C6)

19
Q

Subscapularis: Action

A

Medial rotation, adduction, stability of joint

20
Q

Subscapularis: Arterial supply

A

Subscapular, suprascapular, and circumflex scapular arteries

21
Q

Supraspinatus: Origin

A

Supraspinous fossa

22
Q

Supraspinatus: Insertion

A

Superior facet of greater tubercle

23
Q

Supraspinatus: Innervation

A

Suprascapular nerve (C5, C6)

24
Q

Supraspinatus: Action

A

Initiates abduction

25
Q

Supraspinatus: Arterial supply

A

Suprascapular artery

26
Q

Infraspinatus: Origin

A

Infraspinous fossa

27
Q

Infraspinatus: Insertion

A

Inferior facet of greater tubercle

28
Q

Infraspinatus: Innervation

A

Suprascapular nerve (C5, C6)

29
Q

Infraspinatus: Action

A

Lateral rotation, stability of joint

30
Q

Infraspinatus: Arterial supply

A

Suprascapular and circumflex scapular arteries

31
Q

Triceps brachii: Origin

A

Long head: infraglenoid tubercle of the scapula
Lateral head: posterior humerus, superior to radial groove
Medial head: posterior humerus, inferior to radial groove

32
Q

Triceps brachii: Insertion

A

Proximal olecranon process of ulna + fascia of the forearm

33
Q

Triceps brachii: Innervation

A

Radial nerve (C5, C6, C7)

34
Q

Triceps brachii: Action

A

Chief extensor of the elbow
Long head: resists dislocation during abduction

35
Q

Triceps brachii: Arterial supply

A

Deep brachial artery

Anatomy (2 decks)

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