Very little is known about the way in which the body controls voluntary movement changes after stroke, or which neurophysiological structures cause such changes.

Our series of studies will investigate how stroke patients control low-level voluntary force; how well they can drive their muscles to produce force; and how the command signal from the brain to move the body is altered in the spinal cord.We will also study muscle and nerve function in the upper limb. we will repeat these studies after rehabilitation so that we can determine how the body works to recover functional movement and if we can identify which patients will benefit most from rehabilitation.