Posterior cingulate, precuneal and retrosplenial cortices: Cytology and components of the neural network correlates of consciousness
David Bourget (Western Ontario)
David Chalmers (ANU, NYU)
Rafael De Clercq
Jack Alan Reynolds
Learn more about PhilPapers
In Steven Laureys (ed.), Boundaries of Consciousness. Elsevier (2006)
Neuronal aggregates involved in conscious awareness are not evenly distributed throughout the CNS but comprise key components referred to as the neural network correlates of consciousness (NNCC). A critical node in this network is the posterior cingulate, precuneal, and retrosplenial cortices. The cytological and neurochemical composition of this region is reviewed in relation to the Brodmann map. This region has the highest level of cortical glucose metabolism and cytochrome c oxidase activity. Monkey studies suggest that the anterior thalamic projection likely drives retrosplenial and posterior cingulate cortex metabolism and that the midbrain projection to the anteroventral thalamic nucleus is a key coupling site between the brainstem system for arousal and cortical systems for cognitive processing and awareness. The pivotal role of the posterior cingulate, precuneal, and retrosplenial cortices in consciousness is demonstrated with posterior cingulate epilepsy cases, midcingulate lesions that de-afferent this region and are associated with unilateral sensory neglect, observations from stroke and vegetative state patients, alterations in blood ﬂow during sleep, and the actions of general anesthetics. Since this region is critically involved in self reﬂection, it is not surprising that it is similarly a site for the NNCC. Interestingly, information processing during complex cognitive tasks and during aversive sensations such as pain induces efforts to terminate self reﬂection and result in decreased processing in posterior cingulate and precuneal cortices
|Keywords||No keywords specified (fix it)|
|Categories||categorize this paper)|
|Through your library||Configure|
References found in this work BETA
No references found.
Citations of this work BETA
No citations found.
Similar books and articles
John G. Taylor (1998). Cortical Activity and the Explanatory Gap. Consciousness and Cognition 7 (2):109-48.
Daniel S. Ruchkin, Jordan Grafman, Katherine Cameron & Rita S. Berndt (2003). Working Memory Retention Systems: A State of Activated Long-Term Memory. Behavioral and Brain Sciences 26 (6):709-728.
Paul E. Tibbetts (2001). The Anterior Cingulate Cortex, Akinetic Mutism, and Human Volition. Brain and Mind 2 (3):323-341.
Naoyuki Osaka (2003). How Does the Attentional Pointer Work in Prefrontal Cortex? Behavioral and Brain Sciences 26 (6):751-751.
V. Troiani, J. Peelle, R. Clark & M. Grossman (2009). Is It Logical to Count on Quantifiers? Dissociable Neural Networks Underlying Numerical and Logical Quantifiers. Neuropsychologia 47 (1):104--111.
John D. Newman (2004). Infant Crying and Colic: What Lies Beneath. Behavioral and Brain Sciences 27 (4):470-471.
John Kaag (2009). The Neurological Dynamics of the Imagination. Phenomenology and the Cognitive Sciences 8 (2):183-204.
Antoine Lutz, Julie Brefczynski-Lewis & Richard J. Davidson, Regulation of the Neural Circuitry of Emotion by Compassion Meditation: Effects of Meditative Expertise.
Terence V. Sewards & Mark A. Sewards (2000). The Awareness of Thirst: Proposed Neural Correlates. Consciousness and Cognition 9 (4):463-487.
Allan Combs & S. Kripner (2008). Collective Consciousness and the Social Brain. Journal of Consciousness Studies 15 (s 10-11):264-276.
Added to index2009-01-28
Total downloads6 ( #162,810 of 1,088,374 )
Recent downloads (6 months)1 ( #69,601 of 1,088,374 )
How can I increase my downloads?