FMAER, Landau-Kleffner syndrome, deterioration over one month. The FMAER is shown from a second subject with the Landau-Kleffner syndrome. Display convention is as for Figure 12. The top display shows a normal FMAER response at the time the patient was first studied, presenting with behavioral issues and poor verbal memory without dysphasia. One month later, the left temporal FMAER response had clearly deteriorated and the patient demonstrated receptive language difficulty. See text and Figure 14 for more detail.