What question did this study set out to answer?

To determine how unilateral hippocampal sclerosis alters effective connectivity in distributed frontotemporal networks during verbal working memory encoding.

January 28, 2013NeuroImageOpen Access

Network reconfiguration and working memory impairment in mesial temporal lobe epilepsy

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To determine how unilateral hippocampal sclerosis alters effective connectivity in distributed frontotemporal networks during verbal working memory encoding.
Recorded magnetoencephalographic (MEG) activity during verbal working memory encoding in patients with left mesial temporal lobe epilepsy and healthy control participants.
Modeled directional coupling among the inferior temporal cortex, inferior frontal cortex, and medial temporal lobe using dynamic causal modelling and Bayesian model comparison.
Bayesian model comparison established a bilateral architecture with reciprocal connections among the inferior temporal cortex, inferior frontal cortex, and medial temporal lobe as the optimal model.
Patients showed reduced ipsilesional backward connectivity between the medial temporal lobe and inferior temporal cortex, alongside increased contralesional frontotemporal connectivity.
Decreases in ipsilesional temporal connectivity negatively correlated with contralesional frontotemporal increases, which were inversely associated with memory performance and educational attainment.

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Implication

Neuroimaging study uncovers frontotemporal network reorganization during working memory encoding in mesial temporal lobe epilepsy, suggesting maladaptive contralesional compensation.

Cite This Study

Campo et al. (2013) studied this question.

synapsesocial.com/papers/6a1bc19d01af05bf0da8e94b https://doi.org/10.1016/j.neuroimage.2013.01.036

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Implication

Neuroimaging study uncovers frontotemporal network reorganization during working memory encoding in mesial temporal lobe epilepsy, suggesting maladaptive contralesional compensation.

Network reconfiguration and working memory impairment in mesial temporal lobe epilepsy

Key Points

Discussion

Implication

Cite This Study

Network reconfiguration and working memory impairment in mesial temporal lobe epilepsy

Key Points

Discussion

Implication

Cite This Study