Question

Choose a movement that you do everyday (put on a shoe, stand up from the toilet, etc) and describe all the movements that occur at the joints involved, using the proper terminology (flexion, extension, abduction, external rotation, etc)

Answer 1

A common everyday action done by people is the motion of turning a doorknob.

The joints involved are-

* Shoulder joint - to lift the arm in front [flexion]

* Elbow joint - to bend the arm at the elbows [extension]

* Wrist joint - the gliding joint at the wrist help to rotate the wrist [external rotation]

* Metacarpophalangeal joint at the base of the fingers and the interphalangeal joint in the middle of fingers, which help them to grip the door knob [abduction]

This movement involves supination and pronation of the forearms. Supination is per formed by the forearm extensor muscles, such as supinator muscles. Pronation is performed by the forearm flexor muscles such as pronator teres and pronator quadrates.