Temporal lobe interictal spikes disrupt encoding and retrieval of verbal memory: A subregion analysis.
Epilepsia
; 63(9): 2325-2337, 2022 09.
Article
em En
| MEDLINE
| ID: mdl-35708911
ABSTRACT
OBJECTIVE:
The medial temporal lobe (MTL) encodes and recalls memories and can be a predominant site for interictal spikes (IS) in patients with focal epilepsy. It is unclear whether memory deficits are due to IS in the MTL producing a transient decline. Here, we investigated whether IS in the MTL subregions and lateral temporal cortex impact episodic memory encoding and recall.METHODS:
Seventy-eight participants undergoing presurgical evaluation for medically refractory focal epilepsy with depth electrodes placed in the temporal lobe participated in a verbal free recall task. IS were manually annotated during the pre-encoding, encoding, and recall epochs. We examined the effect of IS on word recall using mixed-effects logistic regression.RESULTS:
IS in the left hippocampus (odds ratio [OR] = .73, 95% confidence interval [CI] = .63-.84, p < .001) and left middle temporal gyrus (OR = .46, 95% CI = .27-.78, p < .05) during word encoding decreased subsequent recall performance. Within the left hippocampus, this effect was specific for area CA1 (OR = .76, 95% CI = .66-.88, p < .01) and dentate gyrus (OR = .74, 95% CI = .62-.89, p < .05). IS in other MTL subregions or inferior and superior temporal gyrus and IS occurring during the prestimulus window did not affect word encoding (p > .05). IS during retrieval in right hippocampal (OR = .22, 95% CI = .08-.63, p = .01) and parahippocampal regions (OR = .24, 95% CI = .07-.8, p < .05) reduced the probability of recalling a word.SIGNIFICANCE:
IS in medial and lateral temporal cortex contribute to transient memory decline during verbal episodic memory.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Epilepsias Parciais
/
Memória Episódica
/
Epilepsia Resistente a Medicamentos
Limite:
Humans
Idioma:
En
Revista:
Epilepsia
Ano de publicação:
2022
Tipo de documento:
Article
País de afiliação:
Estados Unidos