Download UPPER EXTREMITY BONES , MUSCLES

UPPER EXTREMITY
BONES , MUSCLES
DR.VINIT.K.ASHOK
ADJUNCT FACULTY
BONES
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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
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ANY MUSCLE THAT CROSSES A JOINT ACTS ON THAT JOINT
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ORIGIN IS THE MORE FIXED ATTACHMENT
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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
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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
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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
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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
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SUPERFICIAL AND DEEP
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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
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A)
B)
C)
D)
E)
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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
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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
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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
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LUMBRICALS
PALMAR INTEROSSEI
DORSAL INTEROSSEI