Hemispheric asymmetry of event-related potentials in a patient with callosal disconnection syndrome: a comparison of auditory, visual and somatosensory modalities

Neuropsychology and neuropharmacology of P3a and P3b

“…See text for details. Satomi et al, 1995;Barcelo et al, 2000). This hypothesis is supported by evidence that larger callosal fiber tracts are associated with larger P300 amplitudes and shorter latencies for left-compared to right-handed individuals Polich, 1995, 1997;Polich and Hoffman, 1998), since these groups differ in their corpus callosum size (Witelson, 1992;Driesen and Raz, 1995).…”

A tactile P300 brain-computer interface

“…For other users the advantages of a tactile BCI are that it allows them to look and listen to their environment rather than to stimuli necessary for controlling the BCI, and that tactile stimuli can easily go unnoticed by others. Although a BCI with tactile stimuli to for example the hands and wrists could work as well (Satomi et al, 1995; Ito and Takamatsu, 1997; Nakajima and Imamura, 2000) and would be suitable for some applications, tactile stimuli around the waist are specifically appropriate for navigation displays (van Erp and van Veen, 2004; van Erp et al, 2005) and thus a logical choice for navigation BCIs. We tested stimulus configurations consisting of two, four and six equally distributed tactors and did not find a significant difference in classification performance.…”

“…Previous research has shown that tactile stimuli can elicit P300s (Satomi et al, 1995; Ito and Takamatsu, 1997; Nakajima and Imamura, 2000). In these studies, electrical and mechanical stimuli were delivered to the hands and wrists using relatively long inter stimulus intervals (around 2 s in the study by Nakajima and Imamura).…”

Updating P300: An integrative theory of P3a and P3b

“…These imaging findings support observations of larger P300 amplitude over the right compared to left frontal/ central areas for a variety of stimulus types in an oddball task Mertens and Polich, 1997b). Communication between the frontal to temporal/parietal areas appears to be propagated across the corpus callosum to affect ERP morphology (Barcelo et al, 2000;Baudena et al, 1995;Satomi et al, 1995). This pathway contributes to P300 differences between handedness groups: Left-handers have larger callosal pathways than right-handers (Driesen and Raz, 1995;Witelson, 1992), and larger P300 amplitudes with shorter latencies have been found for left-compared to right-handed individuals Polich, 1995, 1997;Polich and Hoffman, 1998).…”