Behavioral measures and EEG monitoring using the Brain Symmetry Index during the Wada test in children

► Quantification of EEG symmetry during the Wada test can reduce subjectivity of EEG interpretation. ► The Brain Symmetry Index (BSI) quantifies lateralized EEG slowing in children during the Wada test. ► Various patterns of BSI changes are associated with distinct clinical and procedural scenarios.