Subtypes of Limbic System Dysfunction Evoking Homicide in Limbic (?) Psychotic Trigger Reaction and Temporal Lobe Epilepsy—Evolutionary Constraints

Abstract

Within an evolutionary context two subtypes of limbic system dysfunctioning are compared: (1) the previously proposed limbic psychotic trigger reaction, in which nondrive motivated homicide is triggered by a specific individualized external stimulus, which evokes a brief-lasting active reliving of past (moderately) stressful, frequently repeated (“kindled”?) situations. The brief-lasting out-of-character homicidal episode with flat affect is typically associated with first-time formed or unformed hallucinations of various modalities and with overactivation of the autonomic nervous system. There is no (noticeable) loss of consciousness, enabling the patient's full recall (at times with suicidal attempts) (Pontius, 1981, 1984, 1987). (2) A rare case of homicide during a fugue state with echopraxia in temporal lobe epilepsy is discussed.