2Els Espots 1 article published in JoVE Behavior Combining Multiple Data Acquisition Systems to Study Corticospinal Output and Multi-segment Biomechanics Michael J. Asmussen1, Aaron Z. Bailey1, Peter J. Keir1, Jim Potvin1, Tim Bergel2, Aimee J. Nelson1 1Department of Kinesiology, McMaster University, 22Els Espots The use of transcranial magnetic stimulation (TMS) to study human motor control requires the integration of data acquisition systems to control TMS delivery and simultaneously record human behavior. The present manuscript provides a detailed methodology for integrating data acquisition systems for the purpose of investigating human movement via TMS.