What motion of skeleton involved in your hand out straight and then turn it back over and back again
The motion of the skeleton involved in straightening and then turning the hand back over and back again is a combination of flexion, extension, and pronation/supination.
1. Flexion: This motion occurs at the wrist joint, where the hand moves in an anterior direction (towards the palm) from a neutral position.
2. Extension: The opposite of flexion, extension occurs when the hand moves in a posterior direction (away from the palm) to return to a straight position.
3. Pronation/Supination: This motion occurs at the forearm, specifically at the proximal radioulnar joint. When the hand is turned over (palm facing down), it is in pronation. Turning it back over (palm facing up) is supination.
These movements involve the articulation of various bones, including the radius, ulna, carpals, and metacarpals. Additionally, muscles, tendons, and ligaments play a crucial role in facilitating these motions and maintaining stability and control.