Skip Navigation LinksHome > July 11, 2012 - Volume 23 - Issue 10 > Lateralization of event-related potential effects during men...
doi: 10.1097/WNR.0b013e3283540330
Cognitive Neuroscience and Neuropsychology

Lateralization of event-related potential effects during mental rotation of polygons

Pellkofer, Juliaa; Jansen, Petrab; Heil, Martina

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Numerous studies have shown that there is an amplitude modulation of the late positivity depending on the angular disparity during mental rotation performance. However, almost all of these studies used characters as stimulus material, whereas studies with different stimuli are rare. In the present experiment, 35 participants were instructed to rotate polygons mentally. Most importantly, with this stimulus material, the well-known event-related potential effects were also present at posterior electrode leads. Interestingly, the amplitude modulation were found to be larger and more reliable over left than over right posterior electrode leads, a finding reported previously for characters as stimuli, although not consistently. Thus, the present data suggest that the left lateralization of event-related potential effects during mental rotation of characters might not be because of their ‘verbal nature’, but might suggest a stronger involvement of the left parietal cortex during mental rotation per se, a suggestion that needs to be addressed with methods providing a higher spatial resolution.

© 2012 Lippincott Williams & Wilkins, Inc.


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