Famous faces but not remembered spaces influence vertical line bisections
| Autor: | John B. Williamson, Adam D. Falchook, Kenneth M. Heilman, Jessica Brooke Baum, Joshua D Claunch, Eric M. Jones, Ira Fischler |
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| Rok vydání: | 2012 |
| Předmět: |
Male
medicine.medical_specialty genetic structures Adolescent Bisection Attentional bias Audiology Vertical bar Visual processing Young Adult Visual inattention Reference Values medicine Humans Attention Visual Pathways Communication Analysis of Variance business.industry Cognitive neuroscience of visual object recognition Recognition Psychology Visual field Clinical Psychology Neurology Pattern Recognition Visual Face Space Perception Line (geometry) Female Neurology (clinical) Psychology business |
| Zdroj: | Journal of clinical and experimental neuropsychology. 34(9) |
| ISSN: | 1744-411X |
| Popis: | Whereas the ventral visual processing stream mediates facial and object recognition, the dorsal stream mediates recognition of spatial relationships. In addition, ventral lesions have been reported to induce visual inattention to the upper visual field and dorsal lesions inattention to the lower field. The purpose of this study is to test the hypothesis that activation of the ventral stream will induce an upward attentional bias and activation of the dorsal stream, a downward bias, as assessed by vertical line bisection tests. Twelve healthy right-handed individuals performed vertical line bisections. During these trials, either pictures of famous faces or dots in different spatial locations were presented above and below the line. The participants were asked to recognize and remember the faces or locations of dots while they performed the bisections. In control trials, they were no faces or dots. An upward bias was observed in all conditions. This upward bias was significantly increased in the face recognition and recall condition, but not altered in the dot location condition. Although the face task appeared to activate the ventral stream and increase the upward vertical bias, the failure of the dot localization task to alter the bias may be related task selection. Dorsolateral lesions cause optic ataxia, a disorder of the egocentric "where" system, and the dot location task in this study was allocentric. Thus, further research will be needed to learn whether an egocentric spatial localization task, with a memory component, will alter the vertical attentional bias. |
| Databáze: | OpenAIRE |
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