Muscles of the upper extremity
The pronator quadratus muscle is a thin quadrilateral sheet, named from itj action and its nearly square shape.
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The flexor carpi ulnaris- named from its influence upon the wrist and its position - is a thick sheet of muscular fibre, somewhat fusiform in shape, which wraps round the convex ulnar border of the forearm.
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The flexor sublimis digitorum - named from its action as a flexor of the fingers, and from its position in relation to the deep flexor (sublimis = superficial) - is a fusiform sheet, with two heads above, and dividing into four tendons below.
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The flexor profundus digitorum- named from its action upon the fingers and jts relation to their superficial flexor - is a strong fusiform sheet of muscular fibres ,vhich wraps round the anterior and inner surfaces of the ulna, and divides below into four tendons for the fingers.
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The palmaris longus - named from its length and its insertion upon the palm bf the hand - is flat and fusiform.
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The pronator teres (Pronator radii teres), named from its action and somewhat cylindrical shape, is a thick ribbon-shaped muscle.
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The lumbricals muscles (french: muscles lombricaux)- named from their resemblance to earth-worms (= lumhrici) - are four small muscles of a fusiform shape.
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The brachio-radialis, or supinator radii longus - named from its attachment to the humerus and radius and sometimes called the supinator longus from an erroneous view of its action - is a fusiform sheet.
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The palmaris brevis - named from its position in the palm of the hand, and its small size - is a small quadrilateral sheet.
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The flexor longus pollicis - named from its action upon the thumb and its .ength as compared with the short muscles of the ball of the thumb- is a fusiform sheet.
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The interossei - named from their position between the metacarpal bones - are seven in number, three being palmar and four dorsal. They are small muscles, of. penniform or bipenniform structure. Both sets are easily exposed to view by ai deep dissection in the palm, but the dorsal set is alone visible in the back of the hand.
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The supra-spinatus muscle (French: Muscle supra-épineux) is named from its position above the spine of the 
The teres minor muscle named from its being the lesser of two somewhat cylindrical muscles is a thick but narrow
The subscapularis muscle (French: muscle sous-scapulaire)- named from its position beneath the scapula - is a thick triangular and somewhat multipenniform
The teres major muscle (french : muscle grand rond)- named from its somewhat cylindrical shape and its size - is a thick