title: Left hemisphere strategies in visual recognition, topographical orientation and time planning.
abstract: Right hemisphere lesions are known to impair, in many cases, visual recognition and visuospatial orientation. We report here on the compensatory strategies used by a patient whose posterior part of the right hemisphere was either destroyed or visually deafferented. She presented a slight appreceptive agnosia, memory disorders, and severe topographical disorientation. Her strategy relied on detail-by-detail analysis of buildings for recognition and on identification of landmarks and memorization of their sequences for finding routes. Time planning was impaired; the patient was unable to use a bi-dimensional timetable, but relied on a (linear) list of assignments. The linear, speech-related strategy she used was sustained uniquely by left hemisphere networks, since no processing of visual information occurred in the right hemisphere.
authors.affiliation: Division Autonome de Neuropsychologie, CHUV, Lausanne, Switzerland.
authors.forename: S
authors.initials: S
authors.lastname: Clarke
authors.forename: G
authors.initials: G
authors.lastname: Assal
authors.forename: N
authors.initials: N
authors.lastname: de Tribolet
mesh_terms: D000293:Adolescent; D001921:Brain / Q000033:anatomy & histology / Q000502:physiology*; D001927:Brain Diseases / Q000473:pathology / Q000523:psychology*; D001931:Brain Mapping; D005260:Female; D007839:Functional Laterality; D006801:Humans; D008279:Magnetic Resonance Imaging; D008570:Memory, Short-Term / Q000502:physiology; D009949:Orientation / Q000502:physiology*; D013028:Space Perception / Q000502:physiology; D013060:Speech / Q000502:physiology; D013998:Time Perception / Q000502:physiology*; D014796:Visual Perception / Q000502:physiology*; D014888:Wechsler Scales