Shoulder and Arm Muscles

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Can you name the Shoulder, Arm, and Hand Muscles?

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Origin (O) and Insertion (I)MuscleInnervation (N) and Action (A)
O- Lateral epicondyle of humerus I- Dorsal surface of the base of the third metacarpal boneN- Radial Nerve (C6, C7) A- extension, abduction (radial deviation)
O- Coracoid process of the scapula I- Radial tuberosity and the bicipital aponeurosisN-Musculocutaneous Nerve (C5, C6) A- flexion, supination
O- Upper part of the lateral border of the scapula I- Inferior facet of greater tubercle of the humerusN- Axillary Nerve (C5) A- lateral rotation
O- Distal fourth of anterior surface of the ulna I- Distal fourth of anterior surface of the radiusN- N- Median Nerve (by its interosseous branch) (C8, T1) A- Pronation
O- Acromion I-Deltoid tuberosity of humerusN- Axillary nerve (C5, C6) A-shoulder abduction, flexion and extension
O- Posterior shaft of the ulna and interosseous membrane I- Base of the distal phalanx of the thumbN- (Posterior interosseous branch of the) Radial Nerve (C7, C8) A- extension
O- Infraglenoid tubercle of scapula I-Posterior part of the olecranon process of ulna and the deep fascia of the dorsal forearmN- Radial Nerve (C7, C8) A-extension
O- Posterior surfaces of both radius and ulna and interosseous membrane O- Radial side of base of the first metacarpal bone, and on the trapezoid boneN- (Posterior interosseous branch of the) Radial Nerve (C7, C8) A- abduction, (extension)
O- Supraglenoid tubercle of scapula I- Radial tuberosity and the bicipital aponeurosisN-Musculocutaneous Nerve (C5, C6) A- flexion, supination
O- Capitate bone and bases of second and third metacarpal bones; Palmar surface of third metacarpal bone I- Ulnar side of base of proximal phalanx of thumbN- Deep brnach of Ulnar Nerve (C8, T1) A- Adduction
O- Four tendons of flexor digitorum profundus muscle I- radial side of dorsal digital expansion, second, third, fourth, and fifth digits N- Median Nerve and Ulnar Nerve A- flexion, extension
O- Medial epicondyle of humerus; Medial margin of olecranon, and upper posterior border of ulna I- Pisiform bone and liagments to the hamate and fifth meatcarpal boneN- Ulnar Nerve (C7, C8) A- flexion, adduction (ulnar deviation)
O-Subscapular fossa of scapula I-Lesser tubercle of humerusN- Subscapular Nerve (C5, C6) A-medial rotation, stabilization
O- Costal cartilage of rib 1 I- Subclavian grooveN- Nerve to Subclavius (C5, C6) A- stabilization and depression
O- Lateral epicondyle of the humerus I- dorsum of the middle and distal phalanges of the four fingersN- (Posterior interosseous branch of the) Radial Nerve (C7, C8) A- extension
O- Lateral epicodyle of the humerus I- dorsal digital expansion of the little fingerN- (Posterior interosseous branch of the) Radial Nerve (C7, C8) A- extension
O- Nuchal ligaments and spinous processes of C7 to T1 vertebrae I- Medial border of scapula at the level of the spine of the scapulaN- Dorsal Scapular Nerve (C4 and C5) A- retraction
O- Each comes from one head from the second, fourth, and fifth metacarpal bones I- Dorsal digital expansions of the second, fourth and fifth fingersN- Ulnar nerve, deep palmar branch (C8, T1) A- Adduction, flexion, extension
O- Lower 3-4 ribs, illiac crest, and inferior angle of scapula, + I- Floor of the intertubercular grooveN- Thoracodorsal Nerve (C6 , C7, C8) A- adduction, extension and medial rotation
O- Spine of the scapula I-Deltoid tuberosity of humerusN- Axillary nerve(C5, C6) A-shoulder abduction, flexion and extension
O- Each comes from two heads from the adjacent sides of metacarpal bones I- Bases of the proximal phalanges and the dorsal expansions of the second, third and fourth fingersN- Ulnar Nerve, deep palmar branch (C8, T1) A- abduction, flexion, extension
O- Infraspinous fossa of the scapula I- Middle facet of greater tubercle of the humerusN-Suprascapular Nerve (C5, C6) A-Lateral rotation of arm and stabilizes humerus
O- Distal half of anterior surface of humerus I- Ulnar tuberosity and anterior surface of the coronoid processN- Musculocutaneous Nerve (and small branch of the Radial Nerve) (C5, C6) A- flexion
O- Coracoid process of scapula I-Middle medial shaft of humerusN- Musculocutaneous Nerve (C6, and C7) A- adduction and flexion
O- Flexor retinaculum and the tubercles of the scaphoid and trapezium bones I- Whole length of lateral border of metacarpal bone of thumbN- Median Nerve (C8, T1) (small branch of deep ulnar nerve) A- Opposition
O- Spinous processes of the T2 to T5 vertebrae I-medial border of the scapulaN- Dorsal Scapular Nerve (C4 and C5) A- retraction
O- Hamulus of the hamate bone and flexor retinaculum I- Base of proximal phalanx of the little fingerN- Ulnar Nerve, deep branch (C8, T1) A- flexion
O- Occipital bone, spines of C7 and T1 -T12 vertebrae I- Lateral third of clavicle, acromion, spine of scapulaN- Accessory Nerve and C3 and C4 A- rotation, elevation, depression, adduction (retraction)
Origin (O) and Insertion (I)MuscleInnervation (N) and Action (A)
O- By a series of muscles slips from ribs 1 to 9 I- Entire anterior surface of the medial (vertebral) border of scapulaN- Long Thoracic Nerve (C5, C6, C7) A- protraction, rotation, stabilization
O-Anterior surface of the sternum, the superior six costal cartilages, and the aponeurosis of the external oblique muscle I-intertubercular groove of the humerusN- Lateral Pectoral Nerve and Medial Pectoral Nerve (C7,C8, T1) A-extension, adduction, medial rotation, flexion
O- Lateral epicondyle of humerus, radial collateral ligament, supinator crest of ulna I- Lateral surface of the proximal third of the radiusN-(Posterior interosseous branch of the) Radial Nerve (C7, C8) A- supination (rotation)
O- Lower third of the lateral supracondylar ridge of the humerus I- dorsal surface of the base of the second metacarpal boneN- Radial Nerve (C6, C7) A- extension, abduction (radial deviation)
O- Posterior surface of the radius and interosseous membrane I- Base of the proximal phalanx of the thumbN- (Posterior interosseous branch of the) Radial Nerve (C7, C8) A- extension
O- Medial epicondyle of humerus and coronoid process of ulna; Anterior surface of radius below the radial tuberosity I- by four long tendons onto the sides of the middle phalanxN- Median Nerve (C7, C8, T1) A- flexion
O- Lateral epicondyle of the humerus I- Medial side of the base of the fifth metacarpal boneN- (Posterior interosseous branch of the) Radial Nerve (C7, C8) A- extension, adduction (ulnar deviation)
O- Upper 3/4ths of anterior and medial aspects of ulna and ulnar half of interosseous membrane I- Anterior surface of base of distal phalanx of 4 medial fingersN- Median Nerve (by its interosseous branch) and the Ulnar Nerve (C8, T1) A- flexion
O- Medial epicondyle of humerus I- anterior flexor retinaculum and the palmar aponeurosisN- Median Nerve (C6, C7) A- flexion
O- Upper two-thirds of lateral supracondylar ridge of humerus I- Lateral aspect of the base of the styloid process of the radiusN- Radial Nerve (C5, C6) A- flexion
O-Anterior surface of the medial half of the clavicle I-intertubercular groove of the humerusN- Lateral Pectoral Nerve and Medial Pectoral Nerve (C5, C6) A- Flexion, Adduction, Medial Rotation
O- Anterior surface of radius and adjacent part of interosseous membrane; Medial epicondyle of humerus or the coronoid process of ulna I-Base of the distal phalanx of the thumbN- Median Nerve (by its interosseous branch) (C8, T1) A- flexion
O- Posterior surface and medial border of humerus and medial intermuscular septum I- Posterior part of the olecranon process of ulna and the deep fascia of the dorsal forearmN- Radial Nerve (C7, C8) A-extension
O- Posterior surface and lateral border of humerus and lateral intermuscular septum I- Posterior part of the olecranon process of ulna and the deep fascia of the dorsal forearmN- Radial Nerve (C7, C8) A-extension
O- Medial epicondyle of humerus I- Base of the second metacarpal boneN- Median Nerve (C6, C7) A- flexion, abduction (radial deviation)
O- Pisiform bone and tendon of flexor carpi ulnaris I- Base of proximal phalanx and dorsal aponeurosis of little fingerN- Ulnar Nerve, deep branch (C8, T1) A- Abduction
O- Posterior aspect of the inferior angle of the scapula I- Crest of the lesser tubercle and the medial lip of the intertubercular grooveN- Subscapular Nerve (C5, C6) A-Adduction, medial rotation, (extension)
O- Occipital protuberance, middle third of superior nuchal line, ligamentum nuchae, + I-Lateral third of clavicle, acromion, spine of scapulaN- Accessory Nerve and C3 and C4 A- rotation, elevation, depression, adduction (retraction)
O- Hamulus of the hamate bone and flexor retinaculum I- Ulnar side of fifth metacarpal boneN- Ulnar Nerve, deep branch (C8, T1) A- Opposition
O- Flexor retinaculum and the tubercle of the trapezium I- Base of the proximal phalanx of thumb, dorsal digital expansion of thumbN- Median Nerve (C8, T1) A- Abduction
O- Medial epicondyle of humerus,coronoid process of ulna I- Midway along the lateral surface of the radiusN- Median nerve (C6, C7) A- Pronation and Flexion
O- Flexor retinaculum and tubercle of the trapezium; Trapezoid and capitate bones I- Radial side of the base of the proximal phalanx of the thumbI- Median Nerve (C8, T1), Deep branch of Ulnar Nerve (C8, T1) A-flexion
O- Thoracolumbar fascia, spinous processes of T7-T12, all lumbar vertebrae and sacrum, + I-Floor of intertubercular grooveN- Thoracodorsal Nerve (C6 , C7, C8) A- adduction, extension and medial rotation
O- Coracoid process of scapula I- ribs 2 to 5N-Medial Pectoral Nerve (C8, T1) A- proraction, elevation
O- Posterior surface of the ulna and interosseous membrane I- Into the extensor hood of the index fingerN- (Posterior interosseous branch of the) Radial Nerve (C7, C8) A- extension
O-Transverse processes of C1 - C4 vertebrae I-Superior part of medial border of scapulaN-Cervical Nerve (C3, C4) and dorsal scapular nerve (C5) A-elevation
O- Sternal end of the clavicle I- Deltoid tuberosity of humerusN- Axillary nerve (C5, C6) A-shoulder abduction, flexion and extension
O-Supraspinous fossa of scapula I-Superior facet of greater tubercle of humerusN- Suprascapular Nerve (C5) A- abduction, lateral rotation

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