Electroencephalography correlates of transcranial direct-current stimulation enhanced surgical skill learning: A replication and extension study

•Application of anodal tDCS concurrent to surgical training enhances unimanual skill acquisition compared to training alone.•Changes in delta EEG activity in the sensorimotor network are associated with surgical skill improvement.•EEG patterns of unimanual and bimanual surgical skill performance differ, primarily within the parietal cortex.•Anodal tDCS modulated alpha frequency band activity during bimanual surgical skill performance.