Bilateral redundancy gain and callosal integrity in a man with callosal lipoma: a diffusion-tensor imaging study

Matthew E. Roser, Michael C. Corballis, Ashok Jansari, Jon Fulford, Abdelmalek Benattayallah, William M. Adams

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Abstract

We investigated whether abnormalities in the structural organization of the corpus callosum in the presence of curvilinear lipoma are associated with increased facilitation of response time to bilateral stimuli, an effect known as the redundancy gain (RG). A patient (A.J.) with a curvilinear lipoma of the corpus callosum, his genetically-identical twin, and age-matched control participants made speeded responses to luminant stimuli. Structural organization of callosal regions was assessed with diffusion-tensor imaging. A.J. was found to have reduced structural integrity in the splenium of the corpus callosum and produced a large RG suggestive of neural summation.
Original languageEnglish
Pages (from-to)185-198
Number of pages15
JournalNeurocase
Volume18
Issue number3
DOIs
Publication statusPublished - 26 Jul 2011

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