Divided View

Split-brain patients were shown composite photographs (a) and were then asked to identify the face they had seen from a series of intact photographs. When asked to verbally state which face they had seen, they said they had seen the face on the right side of the composite. When asked to point with their left hand to the face they had seen, they pointed to the face that had been on the left (b). Because the two cerebral hemispheres could not communicate, the verbal left hemisphere was aware of only the right half of the picture, and the relatively mute right hemisphere was aware of only the left half (c).