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Shoulder & Arm
Question | Answer |
---|---|
DELTOID | Action: abduction of the shoulder, flex the shoulder, horizontally adduct the shoulder, extends the shoulder, internally & externally rotates the shoulder Origin: lateral 1/3 of clavicle, acromion & spine of scapula |
TRAPEZIUS | Action: extend the head & neck, laterally flex the head & neck to same side, rotate head & neck to the opposite side, upward rotate scapula, adduct the scapula, depress scapula Origin: occipital protuberance, spinous process C7-T12 |
LATISSIMUS DORSI | Action: extend the shoulder, adduct the shoulder, internally rotates the shoulder Origin: inferior angle of scapula, spinous processes of last 6 vertebrae, last 3-4 ribs, thoracolumbar aponeurosis & posterior iliac crest (Works w/ teres major) |
TERES MAJOR | Action: extends the shoulder, adduct the shoulder, internally rotates the shoulder Origin: inferior angle & lower 1/3 of lateral border of the scapula ( works w/ latissimus dorsi) |
INFRASPINATUS | Action: adduct the shoulder, externally rotates the shoulder Origin: Infraspinous fossa of the scapula |
SUBSCAPULARIS | Action: internally rotates the shoulder Origin: subscapular fossa of the scapula |
SUPRASPINATUS | Action: abduct the shoulder ( only muscle that abducts) Origin: supraspinous fossa of the scapula |
TERES MINOR | Action: externally rotates the shoulder, adduction of the shoulder Origin: lateral border of scapula |
RHOMBOID MAJOR & MINOR | Action: adduct the scapula, elevate the scapula, downward rotation of scapula Origin: major- spinous process T2-T5 ( lower) minor- spinous process C7-T1 (higher) |
ROTATOR CUFF | SUPRASPINATUS INFRASPINATUS TERES MINOR SUBSCAPULARIS |
LEVATOR SCAPULA | Action: elevate scapula, neck movements (extend, laterally flex, rotate), downward rotate scapula Origin: transverse process C1-4 |
SERRATUS ANTERIOR | Action: Abduction (protraction) of the scapular, scapular depression Origin: upper 8-9 ribs |
PECTORALIS MAJOR | Action: Shoulder adduction, internal rotation, shoulder flexion & extension, horizontal adduction Origin: clavicle, sternum, portion of ribs |
PECTORALIS MINOR | Action: depress scapula, scapular abduction (protraction) Origin: 3-5 ribs |
BICEPS BRACHII | Action: elbow flexion, supination of forearm, shoulder flexion Origin: scapula, short head- coracoid process, long head- supraglenoid tuberlce) |
TRICEPS BRACHII | Action: Elbow extension, shoulder extension, shoulder Adduction Origin: long head- lateral border of scapula, lateral & medial- proximal humerus |
CORACOBRACHIALIS | Action: Flex the shoulder, adduct the shoulder Origin: coracoid process of scapula |