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Modulation of the Hippocampal θ-Rhythm as a Mechanism for Anesthetic-Induced Amnesia

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Suppressing the Mind

Part of the book series: Contemporary Clinical Neuroscience ((CCNE))

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Abstract

Understanding the mechanisms of anesthetic interference with memory and consciousness is of scientific value and clinical importance. For the clinician, the ability to precisely monitor the effect of anesthetics on the brain, the organ where anesthetic drugs exert their core effects (effects on all other organs, no matter how profound, are side effects), would be practice changing.

The last decades have witnessed a momentous increase in the interest of the (neuro) scientific community in synchronized neuronal activity, the “rhythms of the brain” (Buzsaki. 2006. Rhythms of the Brain. 1 ed. New York: Oxford University Press). As their links to higher cognitive function become unraveled, mechanistically grounded approaches to understanding, measuring, and predicting drug effects on the mind become fathomable. This chapter will review the evidence suggesting that the ability of the brain to form explicit memories is dependent on the precise timing of synchronized neuronal activity in the hippocampus that presents as the θ-rhythm. Based on experiments in our lab, we will then develop the argument that anesthetic-induced amnesia is, at some point, reflected by the θ-rhythm and hence can be measured and quantified.

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Acknowledgements

Supported by National Institutes of Health (Bethesda, MD, USA) GM47818 (to M. Perouansky and R. Pearce) and NS056411 (to R. Pearce) and the Department of Anesthesiology, University of Wisconsin, Madison, WI, USA

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  1. Department of Anesthesiology, University of Wisconsin, SMPH B6/319 Clinical Science Center, 600 Highland Avenue, 53792-3272, Madison, WI, USA

    Misha Perouansky

  2. Department of Anesthesiology, University of Wisconsin, Madison, WI, USA

    Robert Pearce

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  1. Misha Perouansky
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Correspondence to Misha Perouansky .

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  1. Dept. Anesthesiology, Medical College of Wisconsin, Watertown Plank Road 8701, Milwaukee, 53226, U.S.A.

    Anthony Hudetz

  2. Dept. Anesthesiology, University of Wisconsin-Madison, University Ave. 1300, Madison, 53706, U.S.A.

    Robert Pearce

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Perouansky, M., Pearce, R. (2009). Modulation of the Hippocampal θ-Rhythm as a Mechanism for Anesthetic-Induced Amnesia. In: Hudetz, A., Pearce, R. (eds) Suppressing the Mind. Contemporary Clinical Neuroscience. Humana Press. https://doi.org/10.1007/978-1-60761-462-3_10

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