Having successfully used them to reduce seizures in psychotics, Scoville decided to remove  H.M.'s hippocampus, a part of the limbic system that was associated with emotion but whose function was unknown.
Habiendo logrado disminuir las  convulsiones en los psicóticos, Scoville decidió quitar el hipocampo de H.M., una parte del sistema límbico asociada a la emoción pero cuya función era desconocida.