MUSCLES OF POSTERIOR FOREARM
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| ORIGIN OF ABDUCTOR POLLICIS LONGUS | POSTERIOR RADIUS, POSTERIOR ULNA, INTEROSSEOUS MEMBRANE
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| INSERTION OF ABDUCTOR POLLICIS LONGUS | BASE OF 1ST METATARSAL
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| ACTION OF ABDUCTOR POLLICIS LONGUS | ABDUCTION OF 1ST METACARPAL OF THUMB AT CM JOINT, ASSISTS WRIST ABDUCTION
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| INNERVATION OF ABDUCTOR POLLICIS LONGUS | RADIAL NERVE
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| ACTING ALONG, THIS MUSCLE ABDUCTS THE THUMB IN A RADIAL DIRECTION AND SOME SOURCES DESCRIBE THIS ACTION AS EXTENSION OF THE THUMB AT CM JOINT | ABDUCTOR POLLICIS LONGUS
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| WITH CONTINUED ACTION, THIS MUSCLE CAN ABDUCT THE WRIST | ABDUCTOR POLLICIS LONGUS
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| ORIGIN OF SUPINATOR | LATERAL EPICONDYLE OF HUMERUS, ANNULAR AND RADIAL COLLATERAL LIGAMENTS, PROXIMAL ULNA AT SUPINATOR CREST
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| INSERTION OF SUPINATOR | LATERAL SURFACE OF PROXIMAL 1/3 OF RADIUS BETWEEN ANTERIOR AND POSTERIOR OBLIQUE LINES
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| INNERVATION OF SUPINATOR | RADIAL NERVE
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| ACTION OF SUPINATOR | SUPINATION OF FOREARM
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| THIS NERVE PASSES BETWEEN THE SUPERFICIAL AND DEEP LAYERS OF THE SUPINATOR | RADIAL
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| SLOW, NON-RESISTED SUPINATION AND FOR SUPINATION WITH THE ELBOW EXTENEDED | SUPINATOR
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| SPEED AND RESISTANCE REQUIRED IN SUPINATION | BICEPS BRACHII REQUIRED
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| ORIGIN OF EXTENSOR CARPI RADIALIS LONGUS | LATERAL SUPRACONDYLAR RIDGE, LATERAL EPICONDYLE OF HUMERUS
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| INSERTION OF EXTENSOR CARPI RADIALLIS LONGUS | BASE OF 2ND METACARPAL
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| ACTION OF EXTENSOR CARPI RADIALLIS LONGUS | EXTENSION, ABDUCTION OF WRIST (RADIAL DEVIATION)
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| INNERVATION OF EXTENSOR CARPI RADIALLIS LONGUS | RADIAL NERVE
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| ACTING ALONE, THIS MUSCLE EXTENDS THE WRIST IN A RADIAL DIRECTION | EXTENSOR CARPI RADIALIS LONGUS
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| ORIGIN OF EXTENSOR CARPI RADIALIS BREVIS | LATERAL EPICONDYLE OF HUMERUS (COMMON EXTENSOR TENDON)
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| INSERTION OF EXTENSOR CARPI RADIALIS BREVIS | BASE OF 3RD METACARPAL
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| ACTION OF EXTENSOR CARPI RADIALIS BREVIS | EXTENSION OF WRIST
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| INNERVATION OF EXTENSOR CARPI RADIALIS BREVIS | RADIAL NERVE
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| ACTING ALONG, THIS MUSCLE EXTENDS THE WRIST IN THE MIDLINE | EXTENSOR CARPI RADIALIS BREVIS
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| ORIGIN OF EXTENSOR CARPI ULNARIS | LATERAL EPICONDYLE OF HUMERUS (COMMON EXTENSOR TENDON), POSTERIOR PROXIMAL ULNA
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| INSERTION OF EXTENSOR CARPI ULNARIS | BASE OF 5TH METACARPAL
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| ACTION OF EXTENSOR CARPI ULNARIS | EXTENSION, ADDUCTION OF WRIST (ULNAR DEVIATION)
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| INNERVATION OF EXTENSOR CARPI ULNARIS | RADIAL NERVE
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| ACTING ALONE, THIS MUSCLE EXTENDS THE WRIST IN AN ULNAR DIRECTION | EXTENSOR CARPI ULNARIS
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| THE TENDON OF THIS MUSCLE RUNS THROUGH A GROOVE BETWEEN THE HEAD OF THE ULNA AND THE STYLOID PROCESS OF THE ULNA | EXTENSOR CARPI ULNARIS
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| ORIGIN OF EXTENSOR DIGITORUM | LATERAL EPICONDYLE OF HUMERUS (COMMON EXTENSOR TENDON)
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| INSERTION OF EXTENSOR DIGITORUM | EXTENSOR EXPANSION OF 4 FINGERS
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| ACTION OF EXTENSOR DIGITORUM | EXTENSION OF PROXIMAL PHALANGES OF 4 FINGERS AT MP JOINTS, ASSISTS EXTENSION OF WRIST
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| INNERVATION OF EXTENSOR DIGITORUM | RADIAL NERVE
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| THIS MUSCLE DIVIDES INTO THE FOUR PROMINENT TENDONS ON THE DORSUM OF THE HAND | EXTENSOR DIGITORUM
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| CONTRACTION OF THIS MUSCLE CONTINUED PAST FINGER EXTENSION WILL RESULT IN EXTENSION OF THE WRIST | EXTENSOR DIGITORUM
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| ORIGIN OF EXTENSOR DIGITI MINIMI | LATERAL EPICONDYLE OF HUMERUS (COMMON EXTENSOR TENDON)
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| INSERTION OF EXTENSOR DIGITI MINIMI | EXTENSOR EXPANSION OF LITTLE FINGER
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| ACTION OF EXTENSOR DIGITI MINIMI | EXTENSION OF PROXIMAL PHALANX OF LITTLE FINGER AT MP JOINT, ASSISTS EXTENSION OF WRIST
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| INNERVATION OF EXTENSOR DIGITI MINIMI | RADIAL NERVE
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| THIS MUSCLE JOINS THE EXTENSOR DIGITORUM TENDON IN THE EXTENSOR EXPANSION | EXTENSOR DIGITI MINIMI
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| ORIGIN OF EXTENSOR INDICIS | POSTERIOR ULNA AND INTEROSSEOUS MEMBRANE
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| INSERTION OF EXTENSOR INDICIS | EXTENSOR EXPANSION OF INDEX FINGER
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| ACTION OF EXTENSOR INDICIS | EXTENSION OF PROXIMAL PHALANX OF INDEX FINGER AT MP JOINT, ASSISTS EXTENSION OF WRIST
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| INNERVATION OF EXTENSOR INDICIS | RADIAL NERVE
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| 4 DEEP MUSCLES ORIGINATING ON POSTERIOR RADIUS, ULNA AND INTEROSSEOUS MEMBRANE FROM MOST PROXIMAL TO DISTAL IN ORIGIN | ABDUCTOR POLLICIS LONGUS, EXTENSOR POLLICIS BREVIS, EXTENSOR POLLICIS LONGUS, AND EXTENSOR INDICIS
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| ORIGIN OF EXTENSOR POLLICIS LONGUS | POSTERIOR ULNA AND INTEROSSEOUS MEMBRANE-MIDDLE 1/3
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| INSERTION OF EXTENSOR POLLICIS LONGUS | BASE OF DISTAL PHALANX OF THUMB
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| ACTION OF EXTENSOR POLLICIS LONGUS | EXTENSION OF DISTAL PHALANX OF THUMB AT IP JOINT, ASSISTS WRIST ABDUCTION
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| INNERVATION OF EXTENSOR POLLICIS LONGUS | RADIAL NERVE
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| THIS MUSCLE FORMS THE MEDIAL BORDER OF THE ANATOMICAL SNUFFBOX | EXTENSOR POLLICIS LONGUS
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| ORIGIN OF EXTENSOR POLLICIS BREVIS | POSTERIOR RADIUS, INTEROSSEOUS MEMBRANE
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| INSERTION OF EXTENSOR POLLICIS BREVIS | BASE OF PROXIMAL PHALANX OF THUMB
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| ACTION OF EXTENSOR POLLICIS BREVIS | EXTENSION OF PROXIMAL PHALANX OF THUMB AT MP JOINT, ASSISTS IN WRIST ABDUCTION
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| THIS MUSCLE FORMS THE LATERAL BORDER OF THE ANATOMICAL SNUFF BOX | EXTENSOR POLLICIS BREVIS
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| ANATOMICAL SNUFFBOX | DEPRESSION ON THE DORSUM OF THE 1ST METACARPAL, REPTEDLY USED TO HOLD SNUFF FOR SNIFFING BY GENTEEL PERSONS IN THE 1800'S
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