Arrangement for a controlled movement of an arm of human

The invention concerns an arrangement for a controlled movement of an arm of a human having at least one driven actuator operatively engageable with the arm to enable a rotation about an axis of a joint of the arm.The invention is characterized in that the driven actuator is designed and arranged to interact with an attachment which is fixable to an upper arm portion of the arm such that the attachment, when fixed at the upper arm portion, rotates around a longitudinal axis of the humerus.