Hemispheric lateralization of cognitive functions in children with centrotemporal spikes

Area of Science:

• Neuroscience
• Developmental Neuroscience
• Pediatric Neurology

Background:

• Benign idiopathic partial epilepsy of childhood with rolandic discharges (BECT) is a common childhood epilepsy syndrome.
• Understanding the impact of unilateral epileptic foci on cognitive development and hemispheric specialization is crucial.

Purpose of the Study:

• To assess the effect of unilateral epileptic foci in BECT on cognitive performance and hemispheric specialization.
• To investigate how the lateralization of epileptic foci influences specific cognitive deficits.

Main Methods:

• Compared cognitive functions (verbal, visual-spatial, visual-attention) in children with left-sided (BECT-L) or right-sided (BECT-R) epileptic foci against controls.
• Utilized visual hemifield presentation to evaluate hemispheric processing.

Main Results:

• Children with BECT-R showed visual-spatial task impairments compared to BECT-L.
• The typical left-hemisphere advantage in verbal tasks was absent in children with BECT-L.
• The global superiority effect was diminished in BECT-R, suggesting impaired right-hemisphere function.

Conclusions:

• Epileptic discharges in BECT have a detrimental effect on cognitive functions in the developing brain.
• The lateralization of the epileptic focus plays a critical role in determining specific cognitive impairments and hemispheric specialization patterns.