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UID:http://sitemason.vanderbilt.edu/element/bzrandu/id/45382
SUMMARY:Department of Psychology Neuroscience Seminar (Brown Bag)
DESCRIPTION:Paul Dux\, PhD\nVanderbilt University/Department of Psychology/ Marois Lab\n“Efficiency of Information Processing in Human Prefrontal Cortex Limits Multitasking Performance”\nA severe ‘bottleneck’ of information processing is revealed when individuals attempt to perform two tasks at once. Under such conditions\, performance of one or both tasks is impaired relative to single task controls (Pashler\, 1994). It has previously been shown that these multitasking (MT) costs can be virtually eliminated after extensive training (e.g. Schumacher at al.\, 2001). To isolate the neural mechanisms underlying these MT limitations\, we took advantage of this training effect as it provides a means to look at neural changes in the brain in the absence of any changes in sensory input\, motor output or task instructions. Using a combination of functional neuroimaging experimental approaches and analytical techniques\, we were able to distinguish between several putative neural mechanisms underlying MT limitations. The results of these analyses converge on a primary mechanism to account for such costs\, namely the poor processing efficiency of sensory-motor information in the posterior Lateral Prefrontal Cortex (pLPFC). These results not only converge with recent ones (Dux et al.\, 2006) in implicating this brain region as a central neural bottleneck of information processing\, they also provide a mechanistic account for MT limitations.\nThursday\, October 25\, 2007\n12\:00 p.m. (noon)\n316 Wilson Hall\nAbstract\:  To be announced\nDepartment of Psychology NEUROSCIENCE SEMINAR SERIES\nFor additional information\, contact Carol Wiley at carol.wiley@vanderbilt.edu [mailto\:carol.wiley@vanderbilt.edu]
URL;VALUE=URI:http://www.vanderbilt.edu/psychological_sciences/news/Calendar
LOCATION:Wilson Hall\, Room 316
CATEGORIES:academics,colloquiumslecturesmeetingssymposiums
CLASS:PUBLIC
SEQUENCE:5
DTSTAMP:20091123T102103
CREATED:US-Central:20070618T144514
LAST-MODIFIED:US-Central:20071022T131140
ORGANIZER;CN=carol wiley:MAILTO:carol.wiley@vanderbilt.edu
DTSTART:US-Central:20071025T120000
DTEND:US-Central:20071025T130000
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