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Spatial attention in agenesis of the corpus callosum: shifting attention between visual fields

Hines, Robert J. and Paul, Lynn K. and Brown, Warren S. (2002) Spatial attention in agenesis of the corpus callosum: shifting attention between visual fields. Neuropsychologia, 40 (11). pp. 1804-1814. ISSN 0028-3932. doi:10.1016/S0028-3932(02)00032-5.

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The role of the corpus callosum in spatially selective visual attention is uncertain. Research using commissurotomy and callosotomy patients has attempted to determine if the corpus callosum plays a role in reorienting attention between visual fields, as if spatial attention is unitary or divisible between the cerebral hemispheres. Reorienting of selective visuospatial attention within versus between visual fields was tested in 10 individuals with agenesis of the corpus callosum (ACC) and nine matched controls. Spatially focused attention to the most likely location of target appearance was created using both peripheral sensory cues and central symbolic cues in separate tests. Results demonstrated that individuals with ACC have significantly greater difficulty reorienting attention to an invalidly cued target stimulus occurring in the opposite visual field. However, this effect did not interact with the type of cueing (sensory or symbolic). Individuals with ACC did not differ from controls either with respect to the laterality of within-field reorientation of attention, or with respect to the most efficient direction of between-field shifting of attention. Since congenital absence of the corpus callosum significantly reduces efficiency in the reorienting of attention between visual fields, spatial attention cannot be completely unified based on a subcortical mechanism and the mobilization of attentional resources within each hemisphere must depend on callosal processes.

Item Type:Article
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Paul, Lynn K.0000-0002-3128-8313
Brown, Warren S.0000-0001-6142-5588
Additional Information:© 2002 Elsevier Science Ltd. Received 20 August 2001; received in revised form 9 January 2002; accepted 11 February 2002. This research was supported in part by NICHD Grant HD33118. The authors would like to thank Joseph Bogen, M.D., for helpful comments regarding an earlier version of this manuscript.
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Subject Keywords:Visual attention; Selective attention; Reorienting; Interhemispheric; Agenesis of the corpus callosum
Issue or Number:11
Record Number:CaltechAUTHORS:20190313-110906267
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:93771
Deposited By: Katherine Johnson
Deposited On:13 Mar 2019 18:17
Last Modified:16 Nov 2021 17:00

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