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Recent "consciousness" articles

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Free choice activates a decision circuit between frontal and parietal cortex
Bijan Pesaran, Matthew Nelson, and Richard Andersen
Nature 453 (7193), 406-9 (16 Apr 2008)
We often face alternatives that we are free to choose between. Planning movements to select an alternative involves several areas in frontal and parietal cortex1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 that are anatomically connected into long-range circuits12. These areas must coordinate their activity to select a common movement goal, but how neural circuits make decisions remains poorly understood. Here we simultaneously record from the dorsal premotor area (PMd) in frontal cortex and the parietal reach region (PRR) in parietal cortex to investigate neural circuit mechanisms for decision making. We find that correlations in spike and local field potential (LFP) activity between these areas are greater when monkeys are freely making choices than when they are following instructions. We propose that a decision circuit featuring a sub-population of cells in frontal and parietal cortex may exchange information to coordinate activity between these areas. Cells participating in this decision circuit may influence movement choices by providing a common bias to the selection of movement goals.
Posted by iandol and 2 others to correlation consciousness on Mon May 19 2008 at 12:18 UTC | info | related
 
Unconscious determinants of free decisions in the human brain
Chun Soon et al.
Nat Neurosci 11 (5), 543-5 (May 2008)
There has been a long controversy as to whether subjectively 'free' decisions are determined by brain activity ahead of time. We found that the outcome of a decision can be encoded in brain activity of prefrontal and parietal cortex up to 10 s before it enters awareness. This delay presumably reflects the operation of a network of high-level control areas that begin to prepare an upcoming decision long before it enters awareness.
Posted by iandol and 8 others to consciousness on Thu May 08 2008 at 08:59 UTC | info | related
 
Walking backwards into tomorrow: Historical consciousness and understanding history
Lee's summary of Rusen's ideas about historical consciousness; where do we want students to be aged 18?
 
Unconscious determinants of free decisions in the human brain
Chun Soon et al.
Nat Neurosci 11 (5), 543-5 (May 2008)
 
Unconscious determinants of free decisions in the human brain
Chun Soon et al.
Nat Neurosci, published online 13 Apr 2008
Chun Siong Soon1,2, Marcel Brass1,3, Hans-Jochen Heinze4 & John-Dylan Haynes1,2 Top of pageThere has been a long controversy as to whether subjectively 'free' decisions are determined by brain activity ahead of time. We found that the outcome of a decision can be encoded in brain activity of prefrontal and parietal cortex up to 10 s before it enters awareness. This delay presumably reflects the operation of a network of high-level control areas that begin to prepare an upcoming decision long before it enters awareness. Top of page -------------------------------------------------------------------------------- Max Planck Institute for Human Cognitive and Brain Sciences, Stephanstrasse 1A, 04103 Leipzig, Germany. Charité – Universitätsmedizin Berlin, Bernstein Center for Computational Neuroscience, Haus 6, Philippstrasse 13, 10115 Berlin, Germany. Department of Experimental Psychology and Ghent Institute for Functional and Metabolic Imaging, Ghent University, Henri Dunantlaan 2, 9000 Ghent, Belgium. Department of Neurology II, Otto-von-Guericke University, Leipziger Strasse 44, 39120 Magdeburg, Germany. Correspondence to: John-Dylan Haynes1,2 e-mail: haynes@bccn-berlin.de
 
General anaesthesia: from molecular targets to neuronal pathways of sleep and arousal
Nicholas Franks
Nat Rev Neurosci 9 (5), 370-86 (May 2008)
 
MindPapers: A Bibliography of the Philosophy of Mind and the Science of Consciousness
consc.net
 
The Missing Link in Cognition: Origins of Self-Reflective Consciousness
Herb Terrace and Janet Metcalfe
Janet Metcalf
 
Preparing and Motivating Behavior Outside of Awareness
Preparing and motivating behavior outside of awareness
Henk Aarts, Ruud Custers, and Hans Marien
Science 319 (5870), 1639 (21 Mar 2008)
Henk Aarts,* Ruud Custers, Hans Marien The mere activation of the idea of a behavioral act moves the human body without the person consciously deciding to take action. In an experiment, we showed that people subliminally primed with the concept of exertion were faster to squeeze a hand grip forcefully but expended more effort when the subliminal primes were directly accompanied by consciously visible positive stimuli. These findings demonstrate the human capacity to rely on mental processes in preparing and motivating behavior outside of awareness. Department of Psychology, Utrecht University, Heidelberglaan 1, 3584 CS Utrecht, Netherlands. * To whom correspondence should be addressed. E-mail: h.aarts@uu.nl
 
Response to Mole: Subjects can attend to completely invisible objects.
Christof Koch and Naotsugu Tsuchiya
Trends in cognitive sciences 12 (2), 44-5 (Feb 2008)

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