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RKIN Exam > Shoulder and Upper Arm > Flashcards

Shoulder and Upper Arm Flashcards

1
Q

What is the origin of the pectoralis minor?

A

Anterior surface of ribs 3-5 (or 2-4)

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2
Q

What is the insertion of the pectoralis minor?

A

Coracoid process of the scapula

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3
Q

What is the action of the pec minor?

A

draws scapula forward and downwards (ribs fixed)
drabs rip cage superiorly (scapula fixed)

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4
Q

What is the origin of the subclavius?

A

Costal cartilage of rib 1

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5
Q

What is the insertion of the subclavius?

A

groove on the inferior surface of the clavicle

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6
Q

What is the function of the subclavius?

A

Stabilizes and depresses pectoral gridle

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7
Q

What is the origin of the serratus anterior?

A

by series of muscle slips from ribs 1-9

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8
Q

What is the insertion of the serratus anterior?

A

Anterior surface of the vertebral border of the scapula

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9
Q

What is the action of the serratus anterior?

A

An agonist to protract and hold scapula against rib cage
rotates scapula (inferior angle laterally and upward)

Abducts and rasies arm and horizontal movements

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10
Q

What is the origin of the trapezius?

A

Occipital bone, ligamentum nuchae, spines of C7-T12

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11
Q

What is the insertion of the trapezius?

A

Spine and acromion of scapula, lateral 3rd of clavicle

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12
Q

What is the action of the trapezius?

A

Stabilizes, raises, retracts and rotates scapula
Adducts and retracts scapula (middle)
Elevates scapula or synergist to head extension
Depresses scapula and shoulder

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13
Q

What is the origin of the Levator Scapulae?

A

Transverse process of C1-C4

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14
Q

What is the insertion of the Levator Scapulae?

A

medial border of scapula, superior to spine

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15
Q

What is the action of the levator scapulae?

A

Elevates and adducts scapula ( Assists/synergist to traps)

Tilts glenoid cavity down, flexes neck to same side (fixed scapula)

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16
Q

What is the origin of the rhomboid minor?

A

The spinous process of C7 and T1

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17
Q

What is the insertion of the rhomboid minor?

A

Medial border of scapula

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18
Q

What is the action of the rhomboid minor?

A

Retracts scapula (squaring shoulders)
Synergist with middle fibers of trapezius
Rotate glenoid cavity (lowers arm against resistance)
Stabilize scapula

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19
Q

What is the origin of the rhomboid major?

A

Spinous process of T2 and T5

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20
Q

What is the insertion of the rhomboid major?

A

Medial border of scapula

21
Q

What is the action of the rhomboid major?

A

Retracts scapula (squaring shoulders)
Synergist with middle fibers of trapezius
Rotate glenoid cavity (lowers arm against resistance)
Stabilize scapula

22
Q

What is the origin of the pec major?

A

Sternal end of the clavicle, sternum, cartilage of ribs 1-6 and aponeurosis of external oblique muscle

23
Q

What is the insertion of the pec major?

A

by a short tendon into the intertubercular groove of the humerus

24
Q

What is the action of the pec major?

A

Agonist of arm flexion
Rotates arm medially
Adducts arm against resistance
Pulls rib cage upward with scapula fixe

25
Q

What is the origin of the Latissimus Dorsi?

A

Via lumbodorsal fascia into spines of T7-L5, lower 4 ribs and iliac crest.

26
Q

What is the insertion of the Latissimus Dorsi?

A

the intertubercular groove of the humerus

27
Q

What is the action of the Latissimus Dorsi?

A

Agonist of Arm extension
Powerful arm adductor
Medially rotates arm and shoulder
Depresses Scapula
Pulls body upward and forward with arms fixed overhead

28
Q

What is the origin of the deltoid?

A

Lateral third of the clavicle, acromion and spine of the scapula

29
Q

What is the insertion of the deltoid?

A

Deltoid tuberosity of humerrus

30
Q

What is the action of the deltoid?

A

Agonist of arm abduction with all fibers, antagonist of pec major + latissimus dorsi

Flexes and medially rotates humerus with anterior fibers, synergist of pec major

Extends and laterally rotates arms with posterior fibers

31
Q

What is the origin of the supraspinatus?

A

Supraspinous foss of the scapula

32
Q

What is the insertion of the supraspinatus?

A

The superior part of the greater tubercle of the humerus?

33
Q

What is the action of the supraspinatus?

A

Stabilizes shoulder joint
helps prevent downward dislocation of the humerus

34
Q

What is the origin of the infraspinatus?

A

infraspinous fossa of the scapula

35
Q

What is the insertion of the infraspinatus?

A

greater tubercle of the humerus, posterior to the supraspinatus

36
Q

What is the action of the infraspinatus?

A

It helps hold the head of the humerus in the glenoid cavity
Stabilizes the should joint, rotates humerus laterally

37
Q

What is the origin of the subscapularis?

A

Subscapular fossa of the scapula

38
Q

What is the insertion of the subscapularis?

A

lesser tubercle of the humerus

39
Q

What is the action of the subscapularis?

A

Chief medial rotator of humerus, assisted by pec major
It helps to hold the head of the humerus in the glenoid cavity, stavilizes shoulder

40
Q

What is the origin of the Teres Minor?

A

The lateral border of the dorsal scapular surface

41
Q

What is the insertion of the Teres Minor?

A

Greater tubercle of humerus, inferior to infraspinatus

42
Q

What is the action of the teres minor?

A

helps hold the head of the humerus in the glenoid cavity
stabilizes shoulder joint, rotates humerus laterally

43
Q

What is the origin of the teres major?

A

The posterior surface of the scapula at the inferior angle

44
Q

What is the insertion of the teres major?

A

the intertubercular groove of the humerus, tendon fused with the tendon of latissimus dorsi.

45
Q

What is the action of the teres major?

A

Posteromedially extends, medially rotates and adducts arm

Synergist of latissimus dorsi

46
Q

What is the origin of the coracobrachialis?

A

the coracoid process of the scapula

47
Q

What is the insertion of the coracobrachialis?

A

Medial surface of humerus shaft

48
Q

What is the action of the coracobrachialis?

A

Flexion and adduction of humerus
Synergist of pec major

RKIN Exam (7 decks)

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