Hippocampal function and visual object processing in temporal lobe epilepsy.

Abstract:

:Limbic event-related potentials related to verbal but not to visual recognition memory have been found to be attenuated within the epileptic hippocampus of patients with temporal lobe epilepsy (TLE). To identify hippocampal contributions to visual processing and memory we recorded intracranial ERPs directly from within the epileptic and the non-epileptic hippocampus in 12 patients with unilateral TLE during a visual object decision and naming task. While the non-epileptic hippocampus differentiated reliably between real and nonsense objects, this effect was completely eliminated within the epileptic mesial temporal lobe. This finding suggests that the hippocampus proper contributes to the semantic processing of visual objects and may help to explain visual memory deficits in TLE.

journal_name

Neuroreport

journal_title

Neuroreport

authors

Vannucci M,Dietl T,Pezer N,Viggiano MP,Helmstaedter C,Schaller C,Elger CE,Grunwald T

doi

10.1097/00001756-200308060-00017

subject

Has Abstract

pub_date

2003-08-06 00:00:00

pages

1489-92

issue

11

eissn

0959-4965

issn

1473-558X

journal_volume

14

pub_type

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