It has long been known that nervous activity is accompanied
by changes of electrical potential. As early as 1675, Caton
using a string galvanometer demonstrated electrical activity
it the exposed brain of enimals.
In 1913, Prawdicz-Neminski (2) described six types of electrical
rhythms in the "electro- cerebrogram" of the dog. ibis
was the first serious attempt to classify observations of
My own interest in electro-encephalography was aroused after
the first publication of Walter. With the institution of the
Nuffield Department of burgery at Oxford, it became possible
for me to undertake e detailed survey of the electrical changes
associated with certain well-defined pathological groups.
I propose for the scope of this thesis to review the
work of the last six months.