Archive for the ‘Neuroscience, the unconscious and movement’ Category

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 […]

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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 […]

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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 […]

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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 […]

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Consciousness as a subset

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Conscious states are a crosstalk mechanism for only a subset of brain processes Ezequiel Morsella & Tiffany Jantz In:- Consciousness and the Universe The authors accept the consensus view that conscious states represent only a subset of brain processing, and that the integration of sensory information and most cognitive processes are unconscious, . It is suggested that identification of processes that are unconscious can reveal those processes that involve consciousness by a process Read more […]

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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 […]

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Mental imagery

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Mental imagery, emotions and ‘literary task sets’ Federico Langer Journal of Consciousness Studies, vol. 19, Nos 7-8, (2012) The extent to which neural mechanisms for perception and for internal mental images are the same or different has been an area of controversy. The author considers that perception and imagery use the same processes, but do so in response to different signals. Perception is viewed as being driven by bottom-up signals from retinal input via primary and later visual cortices, Read more […]

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Orbitofrontal and cingulate

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Emotionality, orbitofrontal & cingulate Positive emotionality is associated with baseline metabolism in orbitofrontal cortex and in regions of the default network N. D. Volkow Molecular Psychiatry (2011) 16, pp. 818-25 http://www.nature.com/mp/ This paper looks at the connections between dopamine, the orbitofrontal and cingulate cortices and their influence on positive emotionality and also resting, introspective states that are not attending much to external signals. In other Read more […]

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Neuroscience

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    This chapter discusses the role of the anterior cingulate cortex. This brain region can be seen as part of a circuit involving the orbitofrontal, the ventral striatum, the dopamine neurons and finally the dorsolateral prefrontal. From the point of view of subjective consciousness, the orbitofrontal can be seen as injecting a subjective consciousness element into the final selection of extended behaviours by the anterior cingulate, which in turn acts on the executive area of the Read more […]

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Volition and the readiness potential

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Gilberto Gomes Volition and the Readiness Potential Journal of Consciousness Studies, 6 Nos 8-9, pp. 59-76 http://ingentaconnect.com/journals/browse/imp/jcs Gomes appears to discuss the whole question of free will, from the basic assumption of a deterministic world, qualified by some macroscopic impact from the quantum level. As the latter is random, it is also deemed irrelevant for freewill. He assumes that what he calls the naturalistic view of the physical world means that the mind Read more […]

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