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Declarative memory formation in hippocampal sclerosis: an intracranial event-related potentials study.

Mormann, F, Fernández, G, Klaver, P, Weber, B, Elger, CE and Fell, J (2007) Declarative memory formation in hippocampal sclerosis: an intracranial event-related potentials study. Neuroreport, 18 (4). pp. 317-321.

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Abstract

The functional deficits associated with hippocampal sclerosis during declarative memory formation are largely unknown. In this study, we analyzed intracranial event-related potentials recorded from the medial temporal lobes of nine epilepsy patients performing a word memorization task. We used frequency-specific wavelet analysis to assess stimulus-related changes in power and intertrial phase coherence. Statistical analysis revealed a significant decrease of stimulus-induced power in the delta and theta range on the side of pathology. No significant differences in phase locking were observed. Findings indicate a reduced availability of recruitable neural assemblies not only in the hippocampus but also in the rhinal cortex during memory formation. Network functions related to the timing of neural responses to the stimulus appear to be preserved.

Item Type: Article
Authors :
NameEmailORCID
Mormann, FUNSPECIFIEDUNSPECIFIED
Fernández, GUNSPECIFIEDUNSPECIFIED
Klaver, Pp.klaver@surrey.ac.ukUNSPECIFIED
Weber, BUNSPECIFIEDUNSPECIFIED
Elger, CEUNSPECIFIEDUNSPECIFIED
Fell, JUNSPECIFIEDUNSPECIFIED
Date : 5 March 2007
Identification Number : https://doi.org/10.1097/WNR.0b013e3280287ae9
Uncontrolled Keywords : Adult, Brain Mapping, Electroencephalography, Epilepsy, Temporal Lobe, Evoked Potentials, Female, Hippocampus, Humans, Male, Memory, Neuropsychological Tests, Sclerosis, Spectrum Analysis, Temporal Lobe
Related URLs :
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 10:40
Last Modified : 17 May 2017 14:51
URI: http://epubs.surrey.ac.uk/id/eprint/828721

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