Using a procedure that was common in the 1930s , he examined epileptic patients who were undergoing brain surgery .
Perhaps the best - known experiments on the human motor map were published by Penfield in 1937 .
Using a procedure that was common in the 1930s , Penfield examined epileptic patients who were undergoing brain surgery .
Perhaps the best - known experiments on the human motor map were published by Penfield in 1937 .