Forearm is the region between the elbow and the wrist. Muscles of forearm consist of muscles like- brachioradialis, flexor carpi radialis, flexor carpi ulnaris, palmaris longus, extensor carpi radialis longus, extensor carpi ulnaris, flexor digitorum profundus, flexor digitorum superficialis, extensor digitorum, extensor indicis, and extensor pollicis longus.
Brachioradialis is a superficial muscle in forearm nearer elbow and it helps in flexing the elbow. Pronator teres is a muscle which is located in the forearm and moves the forearm itself. It is responsible for pronation of palm i.e. with face of the palm downwards opposite to what is done in begging. So also the pronator quadratus which rotates and pronates the forearm. In rapid and forceful pronation these two muscles act together.
Exactly opposite type of movement of turning palm upwards by rotation as in begging is brought about by the supinator muscle.
Working alone, flexor carpi radialis flexes that is curls or brings the wrist nearer. Working with flexor carpi radialis flexor carpi ulnaris flexes the wrist. That is both these carpi are for curling the wrist towards the body. Palmaris longus tenses the deeper and thicker bands of fibrous connective tissue of the palm.
Extensor carpi radialis (brevis - the short one and longus - the long one ) and extensor carpi ulnaris help in moving the wrist away from body that is in abduction of the wrist. Flexor digitorum profundus bends the tips of fingers nearer the palm. Flexor digitorum superficialis does the same for middle bone of the finger.
Extensor digitorum moves finger bones away from the palm and same action is done by extensor indicis for the index finger, that is, the finger next to the thumb. The extensor indicis also extends the wrist.
Flexor digitorum superficialis is attached to each one of the 4 fingers independently. It can therefore flex that is curl or bring nearer a finger individually.
Extensor pollicis longus moves away the distal bone of the thumb. I t can rotate the thumb and can extend that is lengthen the thumb.
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All these muscles help us lift weights as the word 'weightlifting' implies. But they are even more important as they assist us in doing every day tasks like - carrying a book
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