Cortical control of voluntary movement

In nowadays voluntary, multi joint sensory guided are target directed towards limb movements. It is not essentially merely reaching can also be applied to leg movement as well. The Focus is on visually guided reaching as what is most studied. The Basic question arise is how does the brain transform a sensory signal into a pattern of muscle activityto acquire to an object, and grasp it.

Voluntary movements vary from reflexes in numerous significant ways. At first, voluntary movements are prearranged around the performance of a focused task. Therefore the selection of which joints and body segments will be used for a movement based on the goal of the movement, whether it is planned to reach for and lift a glass of water or to return a tennis serve. In disparity to the stereotyped relation among response and stimulus, features of reflexes, voluntary movements differ in response to similar stimulus depending on the behavioral task. Secondly, the effectiveness of voluntary movements improves with experience and learning. Lastly, unlike reflexes, voluntary movements are not mere responses to environmental stimuli though can be produced internally. The higher levels of our motor systems can therefore dissociate two aspects of a stimulus—its informational content and its capacity to trigger a movement. In cortex the information content of a stimulus signals where to move or what to do, though the occurrence of the stimulus might or might not really initiate the suitable movement. In reflexes these aspects of the stimulus are linked