De novo temporal intermittent rhythmic delta activity after laser interstitial thermal therapy for mesial temporal lobe epilepsy predicts poor seizure outcome

Temporal intermittent rhythmic delta activity (TIRDA) is an EEG pattern characterized by intermittent rhythmic sinusoidal bursts and trains of delta activity localized over the temporal regions (Cobb, 1945). Unlike other intermittent rhythmic delta activities such as occipital intermittent rhythmic delta activity (OIRDA) and frontal intermittent rhythmic delta activity (FIRDA), TIRDA represents a pre-operative EEG pattern that predicts focal seizures in patients with temporal lobe epilepsy (TLE) (Reiher et al., 1989).

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