Right hemispheric mediation of dream visualization: a case study.
Cortex; a journal devoted to the study of the nervous system and behavior December 1, 1981 DOI: 10.1016/s0010-9452(81)80066-4 (opens in new tab)
Study at a glance
AI-extracted from the abstract| Characteristics | Case study Case report Peer reviewed |
|---|---|
| Sample size | 1 |
| Population | Male subject with extensive right-hemisphere lesion and contralateral homonymous hemianopia |
| Duration | 2 nights |
| Key findings | Dream narratives and visual imagery may arise from different neurocognitive sources, with visual dream experience depending on right-hemispheric processing. |
Abstract
Our paper addresses, as did a recent study by Greenwood et al. (1977), the question of differential right vs. left hemispheric involvement in REM-sleep dreaming. A male subject with extensive lesioning of the right hemisphere and consequent contralateral homonymous hemianopia was studied for 2 nights in a sleep laboratory where a dream report was collected following each of 6 awakenings from REM sleep. The subject's dream reports were typically sequential and narrative in form, but were lacking specifically in continuous visual imagery. The occasional visual images that appeared in the subject's dreams were described as fragmentary and static in nature. The subject also was unable to perform waking tasks requiring the kinematic representation of extrapersonal space. These observations support the hypotheses that dream narratives may derive from different neurocognitive sources than do the specifically visual realizations of those narratives, and that the visual mediation of dream experience may depend on right-hemispheric processing. Differences between our findings and those of Greenwood et al. may be attributable to differences in dream interview technique.