scholarly journals Differential contributions of the superior and inferior parietal cortex to feedback versus feedforward control of tools

NeuroImage ◽  
2014 ◽  
Vol 92 ◽  
pp. 36-45 ◽  
Author(s):  
Kristen L. Macuga ◽  
Scott H. Frey
Keyword(s):  
Parietal Cortex ◽  
Feedforward Control ◽  
Inferior Parietal Cortex

Interhemispheric ERP asymmetries over inferior parietal cortex reveal differential visual working memory maintenance for fearful versus neutral facial identities

2011 ◽  
Vol 48 (2) ◽  
pp. 187-197 ◽  
Author(s):  
Paola Sessa ◽  
Roy Luria ◽  
Alex Gotler ◽  
Pierre Jolicœur ◽  
Roberto Dell'acqua
Keyword(s):  
Working Memory ◽  
Visual Working Memory ◽  
Parietal Cortex ◽  
Inferior Parietal Cortex

scholarly journals Focused Representation of Successive Task Episodes in Frontal and Parietal Cortex

2019 ◽  
Vol 30 (3) ◽  
pp. 1779-1796 ◽  
Author(s):  
Mikiko Kadohisa ◽  
Kei Watanabe ◽  
Makoto Kusunoki ◽  
Mark J Buckley ◽  
John Duncan
Keyword(s):  
Parietal Cortex ◽  
Object Representation ◽  
Task Complexity ◽  
Target Object ◽  
Complex Object ◽  
Object Selection ◽  
Cognitive Operations ◽  
Inferior Parietal Cortex ◽  
Successive Task ◽  
Location Coding

Abstract Complex cognition is dynamic, with each stage of a task requiring new cognitive processes appropriately linked to stimulus or other content. To investigate control over successive task stages, we recorded neural activity in lateral frontal and parietal cortex as monkeys carried out a complex object selection task, with each trial separated into phases of visual selection and learning from feedback. To study capacity limitation, complexity was manipulated by varying the number of object targets to be learned in each problem. Different task phases were associated with quasi-independent patterns of activity and information coding, with no suggestion of sustained activity linked to a current target. Object and location coding were largely parallel in frontal and inferior parietal cortex, though frontal cortex showed somewhat stronger object representation at feedback, and more sustained location coding at choice. At both feedback and choice, coding precision diminished as task complexity increased, matching a decline in performance. We suggest that, across successive task steps, there is radical but capacity-limited reorganization of frontoparietal activity, selecting different cognitive operations linked to their current targets.

Orienting Attention in Time Activates Left Intraparietal Sulcus for Both Perceptual and Motor Task Goals

2011 ◽  
Vol 23 (11) ◽  
pp. 3318-3330 ◽  
Author(s):  
Karen Davranche ◽  
Bruno Nazarian ◽  
Franck Vidal ◽  
Jennifer Coull
Keyword(s):  
Parietal Cortex ◽  
Interaction Analysis ◽  
Target Identification ◽  
Motor Task ◽  
Intraparietal Sulcus ◽  
General Utility ◽  
Inferior Parietal Cortex ◽  
Psychophysiological Interaction ◽  
Left Parietal Cortex ◽  
Temporal Orienting

Attention can be directed not only toward a location in space but also to a moment in time (“temporal orienting”). Temporally informative cues allow subjects to predict when an imminent event will occur, thereby speeding responses to that event. In contrast to spatial orienting, temporal orienting preferentially activates left inferior parietal cortex. Yet, left parietal cortex is also implicated in selective motor attention, suggesting its activation during temporal orienting could merely reflect incidental engagement of preparatory motor processes. Using fMRI, we therefore examined whether temporal orienting would still activate left parietal cortex when the cued target required a difficult perceptual discrimination rather than a speeded motor response. Behaviorally, temporal orienting improved accuracy of target identification as well as speed of target detection, demonstrating the general utility of temporal cues. Crucially, temporal orienting selectively activated left inferior parietal cortex for both motor and perceptual versions of the task. Moreover, conjunction analysis formally revealed a region deep in left intraparietal sulcus (IPS) as common to both tasks, thereby identifying it as a core neural substrate for temporal orienting. Despite the context-independent nature of left IPS activation, complementary psychophysiological interaction analysis revealed how the functional connectivity of left IPS changed as a function of task context. Specifically, left IPS activity covaried with premotor activity during motor temporal orienting but with visual extrastriate activity during perceptual temporal orienting, thereby revealing a cooperative network that comprises both temporal orienting and task-specific processing nodes.

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