Three cases are briefly reported in which cessation of dreaming is spontaneously described as an aftereffect of an occipitoparietal brain injury. The loss was permanent in two cases and temporary in one. The depression of dreaming was associated with impaired visual imagination and memory in the waking state with residual topographical loss. All three patients were of good pretraumatic intelligence and reasonable confidence could be placed in their testimony. It is tentatively suggested that dreaming is likely to be affected only in those agnosic states in which there is appreciable impairment of visual imagery.