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Anteromesial Temporal Lobectomy for Medically Intractable Temporal Lobe Epilepsy: An Operative Study
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Relationship between déjà vu experiences and recognition-memory impairments in temporal-lobe epilepsy
Chris B Martin1,2, Seyed M Mirsattari3, Jens C Pruessner4
1The Brain and Mind Institute and Department of Psychology, University of Western Ontario, London, Canada.
Memory (Hove, England)
|July 25, 2019
Summary
Bilateral temporal-lobe epilepsy patients experiencing déjà vu show broader memory deficits, impacting both familiarity and recollection. This suggests the rhinal cortex is key for false familiarity in déjà vu.
Area of Science:
- Neuropsychology
- Cognitive Neuroscience
Background:
- Déjà vu involves a sense of familiarity coupled with an awareness of its incorrectness.
- Previous studies linked déjà vu in unilateral temporal-lobe epilepsy (uTLE) to rhinal cortex issues and familiarity deficits.
Purpose of the Study:
- To investigate if bilateral temporal-lobe epilepsy (bTLE) patients with déjà vu exhibit similar memory impairments.
- To explore the role of the rhinal cortex and hippocampus in déjà vu within bTLE.
Main Methods:
- Two experimental tasks were administered to assess memory functions in bTLE patients.
- Performance was compared between patients with and without déjà vu, and with existing uTLE data.
Main Results:
- Bilateral temporal-lobe epilepsy patients with déjà vu showed deficits in both familiarity and recollection.
- These patients also exhibited hippocampal abnormalities, unlike those seen in unilateral cases.
- Findings confirm rhinal cortex involvement in generating false familiarity during déjà vu.
Conclusions:
- The rhinal cortex plays a significant role in the false familiarity characteristic of déjà vu.
- While recollection may help identify familiarity as incorrect, it is not essential for déjà vu to occur in bTLE patients.
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