Muscles of the forearm and hand
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Supinator | Origin: lateral epicondyle of humerus, anterior ulna; Insertion: proximal radius; Action: supinates hand
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| Pronator Quadratus | Origin: distal part of anterior ulna; Insertion: distal radius; Action: pronates hand
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| Pronator Teres | Origin: medial epicondyle of humerus, coronoid process of ulna; Insertion: lateral, middle shaft of radius; Action: pronates hand, flexes forearm
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| Palmaris Longus | Origin: medial epicondyle of humerus; Insertion: palmar aponeurosis; Action: flexes hand
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| Flexor Carpi Radialis | Origin: medial epicondyle of humerus; Insertion: second and third metacarpals; Action: flexes and abducts hand
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| Flexor Carpi Ulnaris | Origin: medial epicondyle of humerus, olecranon process and dorsal order of ulna; Insertion: pisiform, hamate, fifth metacarpal; Action: flexes and adducts hand
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| Flexor Digitorum Superficialis | Origin: medial epicondyle of humerus, proximal ulna, proximal radius; Insertion: middle phalanges of second through fifth digits; Action: flexes proximal and middle phalange, flexes hand
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| Flexor Digitorum Profundus | Origin: anterior, proximal surface of ulna, interosseus membrane; Insertion: distal phalanges of second through fifth digits; Action: flexes phalanges, flexes hand
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| Flexor Pollicis Longus | Origin: anterior portion of radius and interosseus membrane; Insertion: distal phalanx of pollex (thumb); Action: flexes thumb
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| Flexor Pollicis Brevis | Origin: trapezium; Insertion: proximal phalanx of first digit; Action: flexes thumb
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| Abductor Pollicis Brevis | Origin: scaphoid, trapezium; Insertion: proximal phalanx of first digit; Action: abducts thumb
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| Opponens Pollicis | Origin: trapezium; Insertion: first metacarpal; Action: opposes thumb
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| Abductor Digiti Minimi | Origin: pisiform; Insertion: proximal phalanx of fifth digit; Action: abducts fifth digit
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| Flexor Digiti Minimi Brevis | Origin: hamulus of hamate; Insertion: proximal phalanx of fifth digit; Action: flexes fifth digit
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| Opponens Digiti Minimi | Origin: hamulus of hamate; Insertion: fifth metacarpal; Action: opposes fifth digit
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| Extensor Carpi Radialis Longus | Origin: lateral supracondylar ridge of humerus; Insertion: second metacarpal; Action: extends and abducts hand
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| Extensor Carpi Radialis Brevis | Origin: lateral epicondyle of humerus; Insertion: third metacarpal; Action: extends and abducts hand
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| Extensor Carpi Ulnaris | Origin: lateral epicondyle of humerus, proximal ulna; Insertion: fifth metacarpal; Action: extends and adducts hand
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| Extensor Digitorum | Origin: lateral epicondyle of humerus; Insertion: middle and distal phalanges of second through fifth digits; Action: extends phalanges, extends hand
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| Abductor Pollicis Longus | Origin: posterior radius and ulna, interosseous membrane; Insertion: first metacarpal; Action: abducts thumb
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| Extensor Pollicis Longus and Brevis | Origin: posterior radius and ulna, interosseus membrane; Insertion: proximal and distal phalanges of pollex (thumb); Action: extends thumb
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