[ over time, across species, and cross-platform ]
Chris Chatham is a grad student at the University of Colorado, Boulder.
August 29, 2008
Category: Cognitive Neuroscience
Is it possible to form and execute motor intentions without being aware of when those intentions were formed? Precisely this pattern was observed by among (ha!) patients with parietal damage, as reported by Sirigu et al. They showed that patients...
Posted by Chris Chatham at 10:46 AM • 5 Comments •
August 28, 2008
Category: Cognitive Neuroscience
Ideally, our real-world behavior is strongly determined by our context, for the simple reason that some behaviors are only appropriate in some situations (e.g., eating during an internal context of hunger, or using slang during an external context of casual...
Posted by Chris Chatham at 10:37 AM • 0 Comments •
August 27, 2008
Category: Cognitive Neuroscience
Parietal cortex is critical for the maintenance of object information over delays. This is true both in tests of working memory (e.g., 1, 2 and 3) as well as simple visual manipulations involving the occlusion of visible objects. A great...
Posted by Chris Chatham at 11:49 AM • 1 Comments •
August 26, 2008
Category: Cognitive Neuroscience
Andersen et al discuss both the attentional and intentional aspects to the function of the intraparietal sulcus. What's the distinction between attention and intention? First, let's talk about attention. The modal view, based on the biased competition model of Desimone...
Posted by Chris Chatham at 10:13 AM • 0 Comments •
August 25, 2008
Category: Cognitive Neuroscience
People often use the concept "hand-eye coordination" without appreciating its neural basis. Evidence collected by Andersen & colleagues over the past ten years indicates that different areas of parietal cortex are recruited to represent targets which require different effectors, all...
Posted by Chris Chatham at 2:56 PM • 1 Comments •
Category: Cognitive Neuroscience
In their already-classic 2001 article, Miller & Cohen use a "train track" metaphor to illustrate the function of prefrontal cortex. The idea is that myriad learned associations interconnect sensory representations with motor commands (metaphorically, these are the "train tracks"). The...
Posted by Chris Chatham at 2:24 PM • 2 Comments •
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