The temporal dynamics of reading: a PET study

Proceedings. Biological Sciences
C J Price, K J Friston

Abstract

The temporal dynamics of evoked brain responses are normally characterized using electrophysiological techniques but the positron emission tomography study presented here revealed a temporal aspect of reading by correlating the duration a word remained in the visual field with evoked haemodynamic response. Three distinct types of effects were observed: in visual processing areas, there were linear increases in activity with duration suggesting that visual processing endures throughout the time the stimulus remains in the visual field. In right hemisphere areas, there were monotonic decreases in activity with increased duration which we relate to decreased attention for longer stimulus durations. In left hemisphere word processing areas there were inverted U-shaped dependencies between activity and word duration indicating that, after 400-600 ms, activity in word processing areas is progressively reduced if the word remains in the visual field. We conclude that these inverted U effects in left hemisphere language areas reflect the temporal dynamics of visual word processing and we highlight the implication of these effects for the design of activation studies involving reading.

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Citations

Feb 23, 2010·Psychological Research·Luca Latini-CorazziniPatrick Péruch
Nov 5, 2003·NeuroImage·John C Marshall, Gereon R Fink
Mar 10, 2004·NeuroImage·D L FlowersG F Eden
May 21, 2005·Neuropsychologia·Carole HenryLaurent Cohen
Apr 2, 2003·NeuroImage·Andrea MechelliKarl J Friston
May 21, 1999·The European Journal of Neuroscience·S Baron-CohenS C Williams
Sep 21, 2001·Journal of Cognitive Neuroscience·K MayallC J Price
Apr 5, 2003·Journal of Cognitive Neuroscience·Andrea MechelliCathy J Price
Jan 8, 2004·Journal of Cognitive Neuroscience·Yuhong Jiang, Nancy Kanwisher
Nov 13, 2004·Cognitive, Affective & Behavioral Neuroscience·Jane E Joseph, Alison B Farley
Sep 1, 2009·Neuroscience Research·Norio FujimakiTsutomu Murata
Sep 27, 2015·Cortex; a Journal Devoted to the Study of the Nervous System and Behavior·Barbara TomasinoClaudio Luzzatti
Mar 1, 2012·Wiley Interdisciplinary Reviews. Cognitive Science·Christian BellebaumBoris Suchan
Mar 2, 1999·Brain : a Journal of Neurology·C J MummeryJ R Hodges
Dec 1, 2005·Brain : a Journal of Neurology·Susan M RavizzaJulie A Fiez

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