Bilateral cortical representation of tactile roughness.

•We investigated how tactile roughness modulates bilateral representation of touch.•Tactile stimuli with varying roughness were slid under subjects’ fingertip.•Theta and alpha overlap and long latency SEPs were invariant to stimulus roughness.•The temporal lag between N140 and P240 was modulated by roughness.•SEP modulation by roughness suggests a bilateral processing of tactile information.