“…These changes can be observed bilaterally but are typically stronger in the contralateral hemisphere (Devos et al, 2006;Nikouline et al, 2000;. Various experiments involving somatosensory processing and motor performance have described task-related ERD, followed by an increase in power above baseline levels (event-related synchrony; ERS) (Shishida, Hashizume, Onoda, Okamoto, Yamawaki, 2006;Toro et al, 1994). This well documented event-related patterning suggests that somatosensory events (whether evoked or voluntary) provoke early activation in SI areas indicative of rapid processing of the sensory stimuli (Pfurtscheller, 2001), while execution of the movement causes bilateral deactivation in (or alternatively, a resetting of) sensorimotor areas (Huttunen, Komssi, & Lauronen, 2006;Lin & Forss, 2002;Sutherland & Tang, 2006).…”