Covert Orienting in the Split Brain Reveals Hemispheric Specialization for Object-Based Attention

1994 ◽  
Vol 5 (6) ◽  
pp. 380-383 ◽  
Author(s):  
Robert Egly ◽  
Robert Rafal ◽  
Jon Driver ◽  
Yves Starrveveld
Keyword(s):  
Selective Attention ◽  
Cognitive Science ◽  
Simultaneous Measurement ◽  
Hemispheric Specialization ◽  
Neural Substrates ◽  
Visual Selective Attention ◽  
Cerebral Hemispheres ◽  
Experimental Paradigm ◽  
Split Brain ◽  
Object Based

Theories in cognitive science have debated whether visual selective attention is a space-based or object-based process To investigate this issue, we applied a new experimental paradigm that permits the simultaneous measurement of both space-based and object-based attention to a split-brain patient with disconnected cerebral hemispheres The data demonstrate both space-based and object-based components to the allocation of attention, and reveal that the two processes have different neural substrates These findings are related to previous research on split-brain and unilateral parietal patients

scholarly journals Cue Validity and Object-Based Attention

2004 ◽  
Vol 16 (6) ◽  
pp. 1085-1097 ◽  
Author(s):  
Xun He ◽  
Silu Fan ◽  
Ke Zhou ◽  
Lin Chen
Keyword(s):  
Selective Attention ◽  
Event Related Potential ◽  
Visual Selective Attention ◽  
Anterior Region ◽  
Sensory Level ◽  
Cue Validity ◽  
Object Based ◽  
The Relationship

In a previous study, Egly, Driver, and Rafal (1994) observed both space-and object-based components of visual selective attention. However, the mechanisms underlying these two components and the relationship between them are not well understood. In the present research, with a similar paradigm, these issues were addressed by manipulating cue validity. Behavioral results indicated the presence of both space-and object-based components under high cue validity, similar to the results of Egly et al.'s study. In addition, under low cue validity, the space-based component was absent, whereas the object-based component was maintained. Further event-related potential results demonstrated an object-based effect at a sensory level over the posterior areas of brain, and a space-based effect over the anterior region. The present data suggest that the space-and object-based components reflect mainly voluntary and reflexive mechanisms, respectively.

Brain region white matter associations with visual selective attention

2011 ◽  
Vol 5 (4) ◽  
pp. 262-273
Author(s):  
Christie Burger Seiler ◽  
Kelly E. Jones ◽  
David Shera ◽  
Carol L. Armstrong
Keyword(s):  
White Matter ◽  
Selective Attention ◽  
Brain Region ◽  
Visual Selective Attention
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