Spatial and temporal dynamics of visual search tasks distinguish subtypes of unilateral spatial neglect: Comparison of two cases with viewer-centered and stimulus-centered neglect
| Autor: | Kenji Kato, Yukiko Kobayashi, Meigen Liu, Tetsuya Tsuji, Keiichiro Shindo, Katsuhiro Mizuno |
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| Rok vydání: | 2015 |
| Předmět: |
Male
medicine.medical_specialty genetic structures media_common.quotation_subject Neuropsychological Tests Attentional bias Stimulus (physiology) Audiology Functional Laterality 050105 experimental psychology law.invention Developmental psychology Neglect Perceptual Disorders 03 medical and health sciences Spatio-Temporal Analysis 0302 clinical medicine Touchscreen Arts and Humanities (miscellaneous) law medicine Humans Attention 0501 psychology and cognitive sciences Diagnosis Computer-Assisted Applied Psychology Aged media_common Unilateral spatial neglect Visual search 05 social sciences Rehabilitation Healthy subjects Middle Aged Visual search tasks Stroke Neuropsychology and Physiological Psychology Case-Control Studies Space Perception Visual Perception Female Psychology 030217 neurology & neurosurgery |
| Zdroj: | Neuropsychological Rehabilitation. 26:610-634 |
| ISSN: | 1464-0694 0960-2011 |
| Popis: | We developed a computerised test to evaluate unilateral spatial neglect (USN) using a touchscreen display, and estimated the spatial and temporal patterns of visual search in USN patients. The results between a viewer-centered USN patient and a stimulus-centered USN patient were compared. Two right-brain-damaged patients with USN, a patient without USN, and 16 healthy subjects performed a simple cancellation test, the circle test, a visuomotor search test, and a visual search test. According to the results of the circle test, one USN patient had stimulus-centered neglect and a one had viewer-centered neglect. The spatial and temporal patterns of these two USN patients were compared. The spatial and temporal patterns of cancellation were different in the stimulus-centered USN patient and the viewer-centered USN patient. The viewer-centered USN patient completed the simple cancellation task, but paused when transferring from the right side to the left side of the display. Unexpectedly, this patient did not exhibit rightward attention bias on the visuomotor and visual search tests, but the stimulus-centered USN patient did. The computer-based assessment system provided information on the dynamic visual search strategy of patients with USN. The spatial and temporal pattern of cancellation and visual search were different across the two patients with different subtypes of neglect. |
| Databáze: | OpenAIRE |
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