Object-based facilitation and inhibition from visual orienting in the human split-brain.

Steven P Tipper, Robert Rafal, Patricia A Reuter-Lorenz, Yves Starrveldt, Tony Ro, Rob Egly, Shai Danziger, Bruce Weaver

Research output: Contribution to journalArticlepeer-review


Object-based attention was examined in 2 split-brain patients. A precued object could move within a visual field or cross the midline to the opposite field. Normal individuals show an inhibition in detecting signals in the cued object whether it moves within or between fields. Both patients showed this effect when the cued object moved within a visual field. When it crossed the midline into the opposite visual field, however, detection was faster in the cued box. These results reveal both facilitatory and inhibitory effects on attention that are object based and may last for several hundred milliseconds. However, the inhibition requires an intact corpus callosum for interhemispheric transfer, whereas the facilitation is transferred subcortically.

Original languageEnglish
Pages (from-to)1522-1532
Number of pages10
JournalJournal of Experimental Psychology: Human Perception and Performance
Issue number5
StatePublished - 1997


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