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Neuronal activity within the nucleus basalis and conditioned neocortical electroencephalographic activation

PJ Whalen, BS Kapp and JP Pascoe
Journal of Neuroscience 1 March 1994, 14 (3) 1623-1633; DOI: https://doi.org/10.1523/JNEUROSCI.14-03-01623.1994
PJ Whalen
Department of Psychology, University of Vermont, Burlington 05405.
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BS Kapp
Department of Psychology, University of Vermont, Burlington 05405.
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JP Pascoe
Department of Psychology, University of Vermont, Burlington 05405.
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Abstract

The relationship between neuronal activity within the nucleus basalis (NB) and conditioned neocortical EEG activation was investigated in New Zealand rabbits during Pavlovian differential conditioning. Twenty- seven of 56 neurons recorded in conditioned animals demonstrated a significantly greater change in activity to a tone (CS+) that predicted the occurrence of a mildly aversive unconditioned stimulus when compared to a tone (CS-) that did not. Twenty-four of these 27 neurons demonstrated a significant increase in activity to the CS+ compared to the CS-, while the remaining three neurons demonstrated a significant decrease in activity to the CS+ compared to the CS-. In 24 of these 27 neurons (89%) these changes in neuronal activity during CS presentations correlated significantly with a decrease in the power of delta activity in the EEG. In addition, 13 of these 24 neurons (54%) demonstrated significant correlations between neuronal activity and the power of delta activity during CS-free periods. In experimentally naive animals, the activity of 10 of 22 neurons (45%) recorded within the region of the NB correlated with the power of delta activity in the EEG during stimulus-free periods. These results complement a growing body of evidence and provide strong support for the hypothesis that the NB contributes to neocortical activation in the conscious animal.

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The Journal of Neuroscience: 14 (3)
Journal of Neuroscience
Vol. 14, Issue 3
1 Mar 1994
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Neuronal activity within the nucleus basalis and conditioned neocortical electroencephalographic activation
PJ Whalen, BS Kapp, JP Pascoe
Journal of Neuroscience 1 March 1994, 14 (3) 1623-1633; DOI: 10.1523/JNEUROSCI.14-03-01623.1994

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Neuronal activity within the nucleus basalis and conditioned neocortical electroencephalographic activation
PJ Whalen, BS Kapp, JP Pascoe
Journal of Neuroscience 1 March 1994, 14 (3) 1623-1633; DOI: 10.1523/JNEUROSCI.14-03-01623.1994
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