Electroencephalographic correlates of learning in subcortical and cortical structures
Electroencephalography and Clinical NeurophysiologyPublished 1 October 1967
Zeev Elazar, W. R. Adey
Citations68
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TL;DR
The data indicate that during the period of consolidation of learning, the hippocampus plays a leading role in complex interacting neural circuits comprising hippocampus, subthalamus, midbrain reticular formation and cerebral cortex.
Abstract
Abstract 1. 1. Spectral analysis was applied to EEG records taken from amygdala, subthalamus, midbrain reticular formation and visual cortex simultaneously with records from hippocampus during a discrimination learning experiment in cats. High spectral peaks were located in all these structres at 1, 2 and 3 c/sec, indicating an increase in regularity of these slow wave rhythms in advanced stages of training. 2. 2. Spectral peaks in the theta range (particularly at 5 and 6 c/sec) appeared during approach period in the advanced training in all these structures, but were less pronounced and more variable than in hippocampus. 3. 3. Computations of coherences between pairings of EEG records from different structures revealed high degrees of linear interrelation. High and consistent coherences were found between homotopic points in the hippocampal formation of the two hemispheres. More variable coherences were seen between hippocampus and subthalamus, midbrain reticular formation and visual cortex. These relationships were most consistent in the theta range, in the approach epoch and in the advanced stage of learning. 4. 4. Our data indicate that during the period of consolidation of learning, the hippocampus plays a leading role in complex interacting neural circuits comprising hippocampus, subthalamus, midbrain reticular formation and cerebral cortex.
Keywords
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