These experiments on the electrical activity of the brain, begun at the close of 1932, were planned in part to observe the types of potential that appear and the influence of various chemical and other conditions on them; in part to establish an "electrical atlas" relating activity to anatomic regions. The latter end was furthered by introducing the Horsley-Clarke stereotaxic apparatus into our armamentarium during work continued in the first half of 1934. At this time research had to be interrupted for over a year. Although preliminary reports (Gerard, Marshall and Saul1) covering our essential observations have appeared, the full description was withheld in the hope of securing a more complete set of photographic records than we had accumulated. Since much interest in this field is now evident and our atlas may aid other investigators, we now report our findings in detail. Many of our observations have been obtained
GERARD RW, MARSHALL WH, SAUL LJ. ELECTRICAL ACTIVITY OF THE CAT'S BRAIN. Arch NeurPsych. 1936;36(4):675–738. doi:10.1001/archneurpsyc.1936.02260100002001
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