Enhanced GABAergic network and receptor function in pediatric cortical dysplasia Type IIB compared with Tuberous Sclerosis Complex

► First characterization of normal and abnormal cells in Tuberous Sclerosis Complex. ► Differential distribution of abnormal cells in the cerebral cortex of TSC and CD Type IIB cases. ► GABA synaptic activity significantly increased in CD Type IIB compared to TSC cases. ► Electrophysiology of intermediate cells, demonstrating properties similar to balloon cells.