A man holds a chart with a line marked between dots. The man tries to follow the mapped route on a laboratory floor with marked dots. An examiner traces his progress. The man now has to use a similar raised map and use his fingers to trace the route as he moves across the floor. Simple animation of the sensory area in the central sector of the brain. A researcher conducts a test on a man to measure his sensory ability. The patient closes his eyes and lets the doctor know when he can feel a nylon bristle touching his palm. CU of an open palm being touched by a pair of tweezers.