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Anatomy (Upper Extremity) > Pectoral and Intrisic Muscles of the Shoulder > Flashcards

Pectoral and Intrisic Muscles of the Shoulder Flashcards

1
Q

Pectoralis major: origin

A

-clavicle -sternum -costal cartilages of superior ribs

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2
Q

Pectoralis major: insertion

A

anteromedial aspect of proximal humerus

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3
Q

Pectoralis major: innervation

A

-Medial pectoral nerve (C8, T1) -Lateral pectoral nerve (C5,C6, C7)

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4
Q

Pectoralis major: action

A

Glenohumeral joint: -Adduction -Flexion -Medial rotation

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5
Q

Pectoralis minor: origin

A

ribs 3-5

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6
Q

Pectoralis minor: insertion

A

Coracoid process of scapula

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7
Q

Pectoralis minor: innvervation

A

Medial pectoral nerve (C8, T1)

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8
Q

Pectoralis minor: action

A

Scapula: -Protraction -Depression -stabilization

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9
Q

Serratus Anterior: origin

A

lateral aspect of ribs 1-8

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10
Q

Serratus Anterior: insertion

A

Anterior surface of scapula medial border

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11
Q

Serratus Anterior: innervation

A

Long thoracic nerve (C5, C6, C7)

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12
Q

Serratus Anterior: action

A

Scapula: -protraction -Upward rotation -Fixes scapula to thoracic wall

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13
Q

Deltoid: origin

A

-clavicle -acromion -spine of the scapula

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14
Q

Deltoid: insertion

A

Deltoid tuberosity of humerus

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15
Q

Deltoid: innervation

A

axillary nerve (C5, C6)

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16
Q

Deltoid: action

A

anterior: flexion and medial rotation of Glenohumeral joint middle: abduction of glenohumeral joint after 15 degrees posterior: extension and lateral rotation of the glenohumeral joint

17
Q

Teres major: origin

A

inferior angle of the scapula

18
Q

Teres major: insertion

A

anteromedial aspect of proximal humerus

19
Q

Teres major: innervation

A

Lower subscapular (C5, C6)

20
Q

Teres major: action

A

Glenohumeral joint: -medial rotation -adduction

21
Q

Teres minor: origin

A

lateral border of scapula

22
Q

Teres minor: insertion

A

greater tubercle of humerus

23
Q

Teres minor: innervation

A

Axillary (C5, C6)

24
Q

Teres minor: action

A

Glenohumeral joint: -lateral rotation -stabilize the glenohumeral joint

25
Q

Supraspinatus: origin

A

supraspinous fossa of scapula

26
Q

Supraspinatus: insertion

A

greater tubercle of humerus

27
Q

Supraspinatus: innervation

A

suprascapular (C5, C6)

28
Q

Supraspinatus: action

A

Glenohumeral joint: -abduction (initial 15 degrees) -stabilize

29
Q

Infraspinatus: origin

A

infraspinous fossa of scapula

30
Q

Infraspinatus: insertion

A

Greater tubercle of humerus

31
Q

Infraspinatus: innervation

A

suprascapular (C5, C6)

32
Q

Infraspinatus: action

A

Glenohumeral joint: -lateral rotation -stabilize

33
Q

Subscapularis: origin

A

subscapular fossa of scapula

34
Q

Subscapularis: insertion

A

lesser tubercle of humerus

35
Q

Subscapularis: innervation

A

-Upper subscapular (C5, C6) -Lower subscapular (C5, C6)

36
Q

Subscapularis: action

A

Glenohumeral joint: -medial rotation -adduction -stabilize

Anatomy (Upper Extremity) (12 decks)

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