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A study of epileptic psychoses - 150 cases
H S Swamy1, M Mallikarjunaiah, R S Bhatti
1Department of Neurology, National Institute of Mental Health and Neuro Sciences, Bangalore - 560 029.
Indian Journal of Psychiatry
|September 20, 2011
Summary
Epileptic psychosis, a condition affecting 1 in 23 epilepsy patients, typically emerges 9.4 years after epilepsy onset. Acute psychosis onset was linked to shorter epilepsy duration compared to chronic psychosis.
Area of Science:
- Neuropsychiatry
- Epileptology
- Psychiatry
Background:
- Epileptic psychosis is a complex condition requiring further understanding of its characteristics and patient demographics.
- Previous research has not fully elucidated the temporal relationship between epilepsy and the onset of psychotic symptoms.
Purpose of the Study:
- To investigate the epidemiological characteristics of epileptic psychosis in a clinical population.
- To determine the time course and clinical features associated with the development of psychosis in epilepsy patients.
Main Methods:
- A retrospective study of 150 patients diagnosed with epileptic psychosis over five years at NIMHANS neuropsychiatry clinics.
- Exclusion of patients with organic causes for both epilepsy and psychosis.
- Analysis of seizure types, psychosis types, age of onset for both conditions, and duration of epilepsy prior to psychosis onset.
Main Results:
- The ratio of epileptic psychosis to epilepsy was 1:23, and to psychosis was 1:75.
- Mean age at epilepsy onset was 19.4 years, and at psychosis onset was 29 years, indicating a mean epilepsy duration of 9.4 years before psychosis.
- Grandmal seizures (62%) and post-ictal/inter-ictal psychosis (42.7%) were most common. Acute psychosis onset showed a significantly shorter epilepsy duration (p < 0.05) than chronic psychosis.
Conclusions:
- Epileptic psychosis develops after a significant period of epilepsy, with acute psychosis appearing earlier in the epilepsy course.
- Family history, premorbid personality, and seizure frequency were not significantly associated with the pathogenesis of epileptic psychosis in this cohort.
- Further research is needed to understand the specific mechanisms underlying the development of psychosis in individuals with epilepsy.
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