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Lumbricals of the Hand
(O) Surfaces of the flexor digitorum profundus tendons
(I) Extensor aponeurosis on the dorsal surface of the phalange
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Flexor Pollicis Longus
(O) Anterior surface of radius and interosseous membrane
(I) Base of the phalanx of the thumb
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Flexor Pollicis Brevis
- (O) Superficial Head: Flexor retinaculum
- (O) Deep Head: Trapezium, trapezoid and capitate
(I) Base of proximal phalanx of thumb
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Abductor Pollicis Brevis
(O) Flexor retinaculum, trapezium, and scaphoid tubercles
(I) Base of the proximal phalanx of Thumb
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Abductor Pollicis Longus
(O) Posterior surface of radius and ulna, and interosseous membrane
(I) Base of first metacarpal
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Extensor Pollicis Brevis
(O) Posterior surface of radius and interosseous membrane
(I) Base of proximal phalanx of Thumb
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Extensor Pollicis Longus
(O) Posterior surface of Ulna and interosseous membrane
(I) Base of the phalanx of thumb
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Adductor Pollicis
(O) Capitate, second and third Metacarpals
(I) Base of proximal phalanx of thumb
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Opponens Pollicis
(O) Flexor retinaculum and tubercle of trapezium
(I) Entire length of first metacarpal bone, radial surface
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Palmar Interossei
(O) Base of the first, second, fourth, and fifth metacarpals
(I) Base of the proximal phalanx of the related finger and extensor aponeurosis
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Dorsal Interossei
(O) Adjacent sides of all metacarpals
(I) Base of the proximal phalanx of the second, third, and fourth fingers and the extensor aponeurosis
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Abductor Digiti Minimi
(O) Pisiform and tendon of the flexor carpi ulnaris
(I) Base of the proximal Phalanx of fifth finger, ulnar surface
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Flexor Digiti Minimi Brevis
(O) Hook of hamate and flexor retinaculum
(I) Base of proximal phalanx of fifth finger, palmar surface
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Opponens Digiti Minimi
(O) Hook of hamate and flexor retinaculum
(I) Shaft of fifth metacarpal, ulnar surface
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