کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
924139 | 921196 | 2012 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Cognitive conflict in a syllable identification task causes transient activation of speech perception area Cognitive conflict in a syllable identification task causes transient activation of speech perception area](/preview/png/924139.png)
It has previously been shown that task performance and frontal cortical activation increase after cognitive conflict. This has been argued to support a model of attention where the level of conflict automatically adjusts the amount of cognitive control applied. Conceivably, conflict could also modulate lower-level processing pathways, which would be evident as trial-to-trial changes in domain specific activation. The present fMRI experiment used a syllable identification task where conflict is manipulated by presenting recently ignored syllables. Results showed that on trials following a high conflict trial, activation increased primarily in the planum temporale region of the left temporal cortex, an area believed to be involved in syllable discrimination. The experiment thus showed a transient, domain specific attention effect that was modulated on a trial-to-trial basis. We argue that this indicates a self-regulating system where increased levels of conflict directs resources in order to improve performance.
► We applied a syllable discrimination task that varied the degree of cognitive conflict.
► fMRI activation increased in perceptual areas following high conflict trials.
► This indicates that processing resources are automatically directed according to task demands.
► This may indicate a self-regulating attentional mechanism applied to language stimuli.
Journal: Brain and Cognition - Volume 78, Issue 3, April 2012, Pages 200–205