TMS refers to Transcranial Magnetic Stimulation. TMS can be used to establish a causal link between a brain area and task behaviour, or to establish the excitability of the corticospinal and corticobulbar tracts. The Chandler House TMS lab has a Magstim Rapid and Magstim Bistim stimulator as well as 1401 and 1902 CED units to record and amplify electromyographic (EMG) signals from skeletal and facial muscles.