Muscles

The flexor carpi radialis - named from its action as a flexor of the wrist and its position on the radial side of the joint - is flat and fusiform.

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.

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.

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.

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.

The pronator quadratus muscle is a thin quadrilateral sheet, named from itj action and its nearly square shape.

The pronator teres (Pronator radii teres), named from its action and somewhat cylindrical shape, is a thick ribbon-shaped muscle.

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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