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UPPER EXTREMITY BONES , MUSCLES DR.VINIT.K.ASHOK ADJUNCT FACULTY BONES • • FORM PART OF THE APPENDICULAR SKELETON ARE ATTCHED TO THE TRUNK VIA THE PECTORAL GIRDLE( CLAVICLE , SCAPULA). SHOULDER JOINT ( UNSTABLE, GREATER RANGE OF MOVEMENT) BONES A) UPPER ARM- HUMERUS B) FOREARM – RADIUS/ULNA C) WRIST – CARPAL BONES D) PALM –METACARPALS E) FINGERS- PHALANGES * STUDY IN DETAIL FROM THE BOOK AND IN THE LAB MUSCLES • ANY MUSCLE THAT CROSSES A JOINT ACTS ON THAT JOINT • ORIGIN IS THE MORE FIXED ATTACHMENT • INSERTION IS MOVED TOWRDS THE ORIGIN MUSCLES CROSSING THE SHOULDER JOINT( ACT ON THE JOINT AND ALSO MOVE THE UPPER ARM ( HUMERUS) 1. PRIME MOVERS ( LARGEST)- PECTORALIS MAJOR,LATISSIMUS DORSI,DELTOID 2. ROTATOR CUFF MUSCLES- SUPRASPINATUS, INFRASPINATUS SUBSCAPULARIS AND TERES MINOR 3. TERES MAJOR AND CORACOBRACHIALIS • TABLE 11.9 MUSCLES ANTERIOR-FLEXION ARM MUSCLES POSTERIOR- EXTENSION OF ARM ABDUCTORS- MIDDLE FIBRES OF DELTOID ADDUCTORS P.MAJOR,LATISSIMUS DORSI * STUDY THE NERVE SUPPLY ANTERIOR SHOULDER MUSCLES POSTERIOR SHOULDER MUSCLES CROSSING THE ELBOW JOINT • • • • • • • ANTERIOR ---FLEXORS) FOREARM POSTERIOR-EXTENSORS 1. ANTERIOR- BICEPS, BRACHIALIS, BRACHIORADIALIS 2. POSTERIOR-TRICEPS * biceps brachii also supinates the forearm * BICEPS AND BRACIALIS ------MUSCULOCUTANEOUS NERVE TRICEPS AND BRACHIORADIALIS------ RADIAL NERVE MUSCLES CROSSING SHOULDER AND ELBOW JOINT MUSCLES OF FOREARM • • • • • • • • • CAUSE MOVEMENT OF THE WRIST , HAND AND FINGERS, SUPINATION AND PRONATION OF THE FOREARM ANTERIOR – FLEXORS POSTERIOR-EXTENSORS PRONATORS( ANT COMPARTMENT) PRONATOR TERES, PRONATOR QUADARTUS SUPINATORS-( POSTERIOR COMPARTMENT) SUPINATOR MUSCLE MOST FLEXORS ARISE FROM THE MEDIAL EPICONDYLE MOST OF THE EXTENSORS ARISE FROM THE LATERAL EPICONDYLE AT THE WRIST THE FOREARM MUSCLES PRODUCE FLEXION, EXTENSION,ADDUCTION AND ABDUCTION OF THE HAND AT THE FINGERS THEY CAUSE ONLY FLEXION AND EXTENSION MUSCLES OF THE FOREARM • SUPERFICIAL AND DEEP • SUPERFICIALA) PRONATOR TERES B) FLEXOR CARPI RADIALIS C) PALMARIS LONGUS D) FLEXOR CARPI ULNARIS E) FLEXOR DIGITORUM SUPERFICIALIS * ALL ARE SUPPLIED BY THE MEDIAN NERVE EXCEPT THE FLEXOR CARPI ULNARIS ----SUPPLIED BY THE ULNAR NERVE SUPERFICIAL MUSCLES FOREARM DEEP MUSCLES FOREARM • FLEXOR POLLICIS LONGUS- MEDIAN NERVE • FLEXOR DIDGITORUM PROFUNDUS- MEDIAN/ULNAR NERVE • PRONATOR QUADRATUS- MEDIAN NERVE DEEP MUSCLES OF FOREARM POSTERIOR MUSCLES OF FOREARM • • • A) B) C) D) E) • • Extensors SUPERFICIAL AND DEEP GROUPS SUPERFICIAL BRACHIORADIALIS EXTENSOR CARPI RADIALIS LONGUS EXTENSOR CARPI RADIALIS BREVIS EXTENSOR DIGITORUM EXTENSOR CARPI ULNARIS ORIGIN –LATERAL EPICONDYLE EXCEPT THE BRACHIORADIALIS/EXT CARPI RADDIALIS LONGUS NERVE SUPPLY- RADIAL NERVE SUPERFICIAL MUSCLE BACK OF FOREARM DEEP MUSCLES • • • • • SUPINATOR ABDUCTOR POLLICIS LONGUS ENTENSOR POLLICIS BREVIS / LONGUS EXTENSOR INDICIS ALL ARE SUPPLIED BY THE DEEP BRANCH OF THE RADIAL NERVE( POSTERIOR INTEROSSEOUS NERVE) DEEP MUSCLES INTRINSIC MUSCLES OF THE HAND • • • • A) B) C) MOVE FINGERS ALL ARE ON THE PALMAR SIDE ABDUCTORS, ADDUCTORS, OPPOSITION 3 GROUPS THENAR MUSCLES HYPOTHENAR MUSCLES MIDPALMAR MUSCLES( LUMBRICALS AND INTEROSSEI) THENAR MUSCLES • ABDUCTOR POLLICIS BREVIS • FLEXOR POLLICIS BREVIS • OPPONENNS POLLICIS • ADDUCTOR POLLICIS * ALL ARE SUPPLIED BY THE MEDIAN NERVE EXCEPT THE ADDUCTOR POLLICIS( ULNAR NERVE) HYPOTHENAR MUSCLES • ABDUCTOR DIGITI MINIMI • FLEXOR DIGITI MINIMI BREVIS • OPPONENES DIGITI MINIMI * ALL SUPPLIED BY THE ULNAR NERVE THENAR AND HYPOTHENAR MUSCLES MIDPALMAR MUSCLES A)LUMBRICALS - 4 IN NUMBER( NONE TO THUMB) - WORM SHAPED - ARISE FROM THE TENDON OF FDP - NERVE SUPPLY ( LAT 2-MEDAIN NERVE, MEDIAL-2 ( ULANR) B) INTEROSSEI -PALMAR ( 4- LIE VENTRAL TO THE DORSAL)- UNIPENNATE -DORSAL ( 4-)- BIPENNATE - SUPPLIED BY ULNAR NERVE - PAD, DAB * LUMBRICALS PALMAR INTEROSSEI DORSAL INTEROSSEI