common regions of the human frontal lobe recruited by diverse cognitive demands
Post on 30-Dec-2015
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Common Regions of the Human Frontal Lobe Recruited by
Diverse Cognitive DemandsJohn Duncan and Adrian M. Owen
Frontal Lobe
• Connectivity– Modules?
• Frontal functions
• Network of prefrontal regions involved in diverse cognitive tasks
Cognitive Demands
• Response conflict
• Novelty
• Working memory: number of elements
• Working memory: delay
• Perceptual difficulty
Isolation of a Cental Bottleneck of Information Processing with
Time-Resolved fMRIPaul E. Dux, Jason Ivanoff,
Christopher L. Asplund, and René Marois
Central Bottleneck
• Central, amodal processing stage
• Psychological refractory period
• Time-resolved fMRI
Implications
• SMFC as well as pLPFC
• Correspond to mid-dorsolateral and anterior cingulate– Recall Duncan & Owen (2000)
• Diverse cognitive functions, but limitations
PFC
• Top-down control– Access to range of information – Multimodal– Maintain and update representations – Exert biasing signals to other regions– Plasticity
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