Musculoskeletal - Upper Limb

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origin of pec major

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1

origin of pec major

head - medial end of clavicle head - sternocostal end

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2

insertion of pec major

lateral lip of intertubercular groove of humerus

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3

nerve supply of pec major

lateral and medial pectoral nerves

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4

action of pec major

adducts and medially rotates humerus

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5

origin of pec minor

ribs 3, 4, 5

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6

insertion of pec minor

coracoid process of the scapula

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7

nerve supply of pec minor

medial pectoral nerve

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8

action of pec minor

stabilises scapula, accessory respiration muscle

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9

origin of subclavius

1st rib and costal cartilage

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10

insertion of subclavius

inferior aspect of clavicle

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11

Nerve Supply of Subclavius

subclavian nerve

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12

action of subclavius

depression and protraction of shoulder

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13

origin of serratus anterior

external surfaces of ribs 1-8

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14

insertion of serratus anterior

anterior (costal) surface on medial scapular border

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15

nerve supply of serratus anterior

long thoracic nerve

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16

action of serratus anterior

protraction and rotation of scapula

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17

origin of trapezius

nuchal line, nuchal ligament of spinous processes of C7-T12 vertebrae

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18

insertion of trapezius

lateral 1/3 of clavicle anteriorly acromion and spine of scapula posteriorly

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19

innervation of trapezius

spinal root of accessory nerve (CN XI) cervical nerves C3 and C4

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20

action of trapezius

elevation, rotation and retraction of scapula

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21

origin of latissimus dorsi

spinous process of T7-T12 vertebra

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22

insertion of latissimus dorsi

intertubercular groove of humerus (between pec. major and teres major)

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23

innervation of latissimus dorsi

thoracodorsal nerve

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24

action of latissimus dorsi

extension, adduction and medial rotation of humerus

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25

origin of levator scapulae

transverse process of C1-C4 vertebrae

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26

insertion of levator scapulae

medial border of scapula (above spine of scapula)

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27

innervation of levator scapulae

dorsal scapular nerve

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28

action of levator scapulae

elevation of scapula rotation of scapula — tilts glenoid cavity inferiorly

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29

origin of rhomboids

slope obliquely from C7-T5 vertebrae

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30

insertion of rhomboids

deltoid tuberosity of humerus

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31

innervation of rhomboids

dorsal scapular nerve

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32

action of rhomboids

elevation of scapula rotation of scapula — tilts glenoid cavity inferiorly

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33

origin of teres major

inferior lateral border of scapula

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34

insertion of teres major

medial lip of intertubercular groove

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35

innervation of teres major

lower subscapular nerve

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36

action of teres major

adduction and medial rotation of the arm

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37

origin of teres minor

superior part of the lateral scapular border

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38

insertion of teres minor

greater tubercle of humerus

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39

innervation of teres minor

axillary nerve

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40

action of teres minor

lateral rotation of arm at shoulder joint

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41

origin of deltoid

lateral 1/3 of clavicle, acromion and spine of scapula

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42

insertion of deltoid

deltoid tuberosity of humerus

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43

innervation of deltoid

axillary nerve — branch of brachial plexus

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44

action of deltoid

anterior — flexion arm, assisted by pec. major middle — abduction of arm, initated by supraspinatus posterior — extension of arm, assisted by latissimus dorsi

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45

origin of supraspinatus

supraspinous fossa

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46

insertion of supraspinatus

greater tubercle of humerus

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47

innervation of supraspinatus

suprascapular nerve

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48

action of supraspinatus

adduction of arm to 15 deg assists deltoid muscle in initiation

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49

origin of infraspinatus

infraspinous fossa

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50

insertion of infraspinatus

greater tubercle of humerus

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51

innervation of infraspinatus

suprascapular nerve

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52

action of infraspinatus

lateral rotation

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53

origin of subscapularis

subscapular fossa

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54

insertion of subscapularis

anterosuperior surface of humerus at lesser tubercle

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55

innervation of subscapularis

upper and lower subscapular nerves

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56

action of subscapularis

medial rotation of arm adduction of arm

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57

origin of biceps brachii

long head — supraglenoid tubercle of the scapula short head — coracoid process of scapula

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58

insertion of biceps brachii

radial tuberosity

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59

innervation of biceps brachii

musculocutaneous nerve

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60

action of biceps brachii

flexion at the elbow joint supination of the forearm

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61

origin of the brachialis

anterior surface of midshaft of humerus

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62

insertion of the brachialis

ulnar tuberosity

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63

innervation of the brachialis

musculocutaneous nerve

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64

action of the brachialis

(main) flexion of the forearm

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65

origin of coracobrachialis

coracoid process

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66

insertion of coracobrachialis

mid-shaft of humerus

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67

innervation of coracobrachialis

musculocutaneous nerve

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68

action of coracobrachialis

(weak) flexion at the shoulder joint adduction of the arm

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69

origin of triceps brachii

long head — infraglenoid tubercle of scapula

medial head — posterior surface of humerus, inferior to radial groove

lateral head — posterior surface of humerus, superior to radial

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70

insertion of triceps brachii

olecranon process

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71

innervation of triceps brachii

radial nerve

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72

action of triceps brachii

extension of forearm long head — stabilises head of humerus when arm is abducted

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73

muscles in the superficial layer of the anterior compartment of the forearm

pronator teres flexor carpi radialis palmaris longus flexor carpi ulnaris

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74

muscles in the middle layer of the anterior compartment of the forearm

flexor digitorum superficialis

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75

muscles in the deep layer of the anterior compartment of the forearm

flexor pollicis longus flexor digitorum profundus pronator quadratus

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76

origin of pronator teres

medial epicondyle of humerus

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77

insertion of pronator teres

mid shaft of humerus

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78

innervation of pronator teres

median nerve

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79

action of pronator teres

pronation of forearm

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80

origin of flexor carpi radialis

medial epicondyle of humerus

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81

insertion of flexor carpi radialis

base of 2nd metacarpal bone

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82

innervation of flexor carpi radialis

median nerve

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83

action of flexor carpi radialis

flexion at wrist joint abduction at wrist joint

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84

origin of palmaris longus

medial epicondyle of humerus

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85

insertion of palmaris longus

central aponeurosis of palm

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86

innervation of palmaris longus

median nerve

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87

action of palmaris longus

flexion at wrist joint

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88

origin of flexor carpi ulnaris

medial epicondyle of humerus

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89

insertion of flexor carpi ulnaris

pisiform hook of hamate and 5th metacarpal bone

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90

innervation of flexor carpi ulnaris

ulnar nerve

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91

action of flexor carpi ulnaris

flexion at wrist joint adduction at wrist joint

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92

origin of flexor digitorum superficialis

medial epicondyle of humerus, coronoid process of ulna and anterior border of radius

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93

insertion of flexor digitorum superficialis

middle phalanges of the medial 4 digits

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94

innervation of flexor digitorum superficialis

median nerve

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95

action of flexor digitorum superficialis

flexion of the middle phalanges at proximal interphalangeal joints flexion of proximal phalanges at metacarpophalangeal joints

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96

origin of flexor pollicis longus

anterior surface of radius and interosseous membrane

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97

insertion of flexor pollicis longus

base of distal phalanx of thumb (pollex)

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98

innervation of flexor pollicis longus

median nerve

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99

action of flexor pollicis longus

flexion of the phalanges of thumb

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100

origin of flexor digitorum profundus

proximal anterior surface of ulna

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