Whatever Became of the Ascending Reticular Activating System?

  • C. H. Vanderwolf


According to conventional ideas on the subject, activation of the electrocorticogram is due to activity in the ascending reticular activating system, a diffuse system originating in the brain stem and projecting to the “non-specific” nuclei of the thalamus, especially the intralaminar nuclei. These nuclei, in turn, are supposed to send fibers to all regions of the cortex. Activity in this ascending system is said to produce neocortical activation and, therefore, to play a pivotal role in the sleep-waking cycle, arousal, consciousness, and attention.


Locus Coeruleus Basal Forebrain Spike Count Intralaminar Nucleus Thalamocortical Projection 
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Notes on Chapter 9

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Copyright information

© Springer Science+Business Media New York 2003

Authors and Affiliations

  • C. H. Vanderwolf
    • 1
  1. 1.University of Western OntarioLondonCanada

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