Developments in electroencephalography; the basal and temporal regions.

Whenever rhythmic 10-14 per second activity can be detected in the basal electroencephalogram, there are indications that this is the distant effect (volume conductor spread) of the simultaneous large potentials generated in the scalp regions or elsewhere. Occasionally one sees rhythmic 7 per second activity recorded with highest voltage from one or the other tympanic electrode. Penfield and Erickson have suggested that dreaming may be a function of the temporal lobes.' In the light of this it is an interesting, though possibly not significant, observation that there is superficially little to differentiate the waking electroencephalogram of the basal temporal regions from that obtained in early sleep.

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