Background: Previous research has shown that the suppression of theta wave activity and the enhancement of Sensorimotor Rhythm (SMR) through electroencephalographic (EEG) biofeedback is an effective treatment for epilepsy. The current research reports the results of EEG biofeedback treatment for patients presenting with seizure behaviors in the absence of epileptiform EEG activity.
Methods: In addition to psychotherapy, 3 patients, 2 women and 1 man, were trained, using EEG feedback once per week, to reduce the ratio of theta band to SMR band EEG amplitudes.
Results: The results showed that reductions in seizure activity were related to reductions in the theta – SMR ratio.
Conclusions: These findings support the view that theta – SMR feedback training, in conjunction with psychotherapy, is an effective adjunctive treatment for pseudoseizure disorder. Biological Psychiatry 1998; 44(11); 1196-1199. © 1998 Society of Biological Psychiatry
Key Words: Neurotherapy, electroencephalographic feedback, pseudoseizures, nonepileptic events, biofeedback
Pseudoseizures are sudden changes in behavior that appear to be seizures but without any identifiable organic cause (Bowman and Markand 1996). Such nonepileptic events (NEE) may be characterized by epileptic-like seizures, numbness in the face and extremities, fainting, and fugue-like states. Because pseudoseizure patients manifest high levels of psychiatric comorbidity (Lempert and Schmidt 1990; Bowman 1993) and no identifiable neurological anomalies, it is assumed by many clinicians that such NEE are psychological in nature (Bowman and Markand 1996).
Pseudoseizure disorder is puzzling because of the lack of significant EEG anomalies. Such patients often
From the School of Psychiatry, Ottawa University, Ottawa, Canada.
Address reprint requests to Paul G. Swingle, PhD, School of
Psychology, Ottawa University, Ottawa, K1N 6N5, Canada.
Received November 4, 1996; revised August 27, 1997; accepted
September 10, 1997
Figure 3. Two-minute baseline recording of the average that/SMR ratio at the beginning and end of neurotherapy sessions with a client with pseudoseizure disorder. Measures took place during client-reported seizure-free, seizure, and depressed periods. The theta/SMR ratios during an in situ seizure are presented with the data collected from the seizure period.