Archive for the ‘Neuroscience and perception’ Category

Pain and emotional assessment

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Independence and connections of pain and suffering S. Benjamin Fink Journal of Consciousness Studies, 18, No. 9-10, 2011, pp. 45-66 http://ingentaconnect.com/journals/browse/imp/jcs As part of his discussion of pain and consciousness, Fink mentions the condition known as ‘pain asymbola’. With this condition, patients are aware of the pain, but not of its unpleasant aspect. It should be stressed that this is distinct from the condition of analgesic patients that have no awareness of pain. Read more […]

Dynamic coordination in the brain

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Coordination in Circuits Mayank Mehta et al In:- Dynamic Coordination in the Brain – Eds. Christoph von der Malsburg, William A. Phillips, & Wolf Singer This chapter examines aspects of neural synchronies, compression of information in relation to neuron oscillations, and the gamma synchronies involvement in communication between neural assemblies in different areas of the brain. All layers of the cortex have a variety of inhibitory interneurons using the GABA neurotransmitter. Read more […]

Coordination in brain systems

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Coordination in brain systems Moser, E. I. et al In:- Dynamic Coordination in the Brain: From Neurons to Mind – Eds. Christoph von der Malsburg, William Phillips & Wolf Singer Neuroimaging of the human brain indicates coordination of activity between different brain regions. Large scale coordination is shown to span the entire brain.  Rhythmic modulation of electrical activity is seen as a possible mechanism to change the couplings amongst neurons. Networks undergoing electrical oscillation Read more […]

Coordination in brain systems

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Coordination in brain systems Moser, E. I. et al In:- Dynamic Coordination in the Brain: From Neurons to Mind – Eds. Christoph von der Malsburg, William Phillips & Wolf Singer Neuroimaging of the human brain indicates coordination of activity between different brain regions. Large scale coordination is shown to span the entire brain.  Rhythmic modulation of electrical activity is seen as a possible mechanism to change the couplings amongst neurons. Networks undergoing electrical oscillation Read more […]

Neural coordination

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Neural Coordination and Human Cognition Catherine Tallon-Baudry In:- Dynamic Coordination in the Brain: From Neurons to Mind – MIT Press Brain imaging in recent years has led to the brain being seen in terms of a large number of functional regions, and this in turn creates a need to explain how the activities of these regions are coordinated. This chapter emphasises the distinction between learned routes in the brain and the coordination that is needed to deal with new perceptions and Read more […]

Psilocybin and altered states

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Neural correlates of the psychedelic state as determined by fMRI studies with psilocybin www.pnas.org/cgi/doi/10.1073/pnas.1119598109 This paper further undermines the persistent claim within mainstream consciousness studies that all that needs to be done is to deconstruct the self (a relatively easy process) and then declare the consciousness problem solved. Altered states of consciousness have always appeared to contradict this claim, but the evidence of this was at a rather anecdotal level. Read more […]

Not ‘just what it is like’

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Steven Bodovitz In:- Consciousness and the Universe (2009-11) This paper describes an interesting experiment serving to demonstrate the distinction between information processing and conscious/subjective assessment. In an experiment by Lau & Passingham (2006) subjects are shown an image (the target), followed quickly by a second image (the mask). When the second image follows quickly enough, the first image/target is removed from consciousness. In a finding similar to blindsight and other Read more […]

Animal consciousness

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The quest for animal consciousness Andrea Nani, Clare Eddy & Andrea Cavanna, Universities of Turin, Birmingham and UCL Journal of Cosmology, 2011, Vol. 14 The most interesting aspect of this paper is the reference to studies demonstrating that only sensory information that is reported as conscious in humans is able to activate brain regions dealing with executive functions. Studies of neural activity indicate an overlap between human and animal activity. Studies in many species suggest Read more […]

Attention and vision

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Attention during natural vision warps semantic representation across the human brain Cukur, T. et al, University of California Berkeley Nature Neuroscience, 21 April 2013 Summary of the above paper Keywords: attention, representation of attended categories Attention is hypothesised to be a tuning mechanism to enhance the representation of attended stimuli, and correspondingly reduce the represntation of unattended stimuli. Scanning studies conducted by the authors suggest an expansion Read more […]

Affective and cognitive integration

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Neural mechanisms of autonomic, affective and cognitive integration Hugo D. Critchley, Wellcome and UCL Journal of Comparitive Neurology, 493, pp. 154-6 This paper discusses evidence for the involvement of bodily responses in brain processes, particularly those related to emotional experience. There does, however, seem to be ‘a dog that doesn’t bark in the night’ somewhere in this paper. There seems to be an unspoken assumption that there is an important distinction between volitional or Read more […]