An electrically-powered instrument designed to assess neuromuscular function by measuring the force or power exerted by the muscles of the hand/forearm to squeeze/pinch an object. It is used to assess a patient's grip strength in clinical or research settings, typically as part of a rehabilitation program for geriatric patients or those who have suffered a stroke; it may in addition be designed to be used as part of an interactive rehabilitation system whereby forces applied by the patient translate to movements in a video-game. It includes a force transducer to translate force into electrical impulses for measurement.