PSYCH 454 Lecture Notes - Lecture 21: Posterior Parietal Cortex, Visual Cortex, Superior Colliculus
24 May 2018
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Lect 21: Attention part 2
Network of Areas in Frontal and Parietal Cortex Guide Attention
●This slide: what is telling sensory neurons (V4) what attentional priority is, and
how to send information to sensory cortex
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Fronto-parietal attention network represents attention priorities
○including FEF front eye field, SEF supplementary eye field, and PPC posterior
parietal cortex
■These areas provide feedback to sensory cortex about what is
behaviorally relevant
■Information on what’s important in the world around us
○Attention priority in brain
●Lateral intraparietal area (in PCC), SEF and FEF
○Form frontoparietal attention network
○Going to study how they encode for attention priority and how they send
information back to sensory cortex to filter information
●LIP = lateral intraparietal area (in PPC of MONKEY)
○Terms: Ex Vis Ctx = extrastriate visual cortex (includes V4);V1 = primary visual
cortex; Thal = thalamus; BG = basal ganglia; SC = superior colliculus.
Posterior Parietal Cortex (ex: LIP) signals attention priorities
●Neurons in PPC respond well to behaviorally relevant
stimuli in the RF
○Reduced or no response to stimuli in RF that are not behaviorally relevant
●Pink square= currently irrelevant stimulus
○will not respond to this RF
○Pink square Dims → LIP increase AP→ makes it behaviorally relevant aka, the
attention priority
Manipulated Attention using Delayed Match-to-Sample Task
Document Summary
Network of areas in frontal and parietal cortex guide attention. This slide: what is telling sensory neurons (v4) what attentional priority is, and how to send information to sensory cortex. Including fef front eye field, sef supplementary eye field, and ppc posterior parietal cortex. These areas provide feedback to sensory cortex about what is behaviorally relevant. Information on what"s important in the world around us. Lateral intraparietal area (in pcc), sef and fef. Going to study how they encode for attention priority and how they send information back to sensory cortex to filter information. Lip = lateral intraparietal area (in ppc of monkey) Terms: ex vis ctx = extrastriate visual cortex (includes v4);v1 = primary visual cortex; thal = thalamus; bg = basal ganglia; sc = superior colliculus. Posterior parietal cortex (ex: lip) signals attention priorities. Neurons in ppc respond well to behaviorally relevant stimuli in the rf.
