PROBLEM TO BE SOLVED: To accurately measure brain reactions in different territories induced by stimulation of different organs in a short time. SOLUTION: A stimulation timing control unit of a brain reaction measurement system has a delay time of a brain reaction in a first brain area due to a second stimulus to a brain reaction in a first brain area by a first stimulus, and a first. Based on the delay time of the brain reaction in the second brain area by the first stimulus to the brain reaction in the second brain area by the second stimulus, and the reaction of the first brain area by the first stimulus. , The reaction of the first brain area by the second stimulus does not overlap, and the reaction of the second brain area by the second stimulus and the reaction of the second brain area by the first stimulus overlap. No, the start time and end time of the first stimulus and the start time and end time of the second stimulus are calculated, and the calculated start time and end time of the first stimulus are set as the first stimulus output unit. The calculated start time and end time of the second stimulus are set in the second stimulus output unit. [Selection diagram] Fig. 5【課題】異なる器官の刺激によりそれぞれ誘発される異なる領野の脳反応を短時間で精度良く計測する。【解決手段】脳反応計測システムの刺激タイミング制御部は、第１の刺激による第１の脳領野での脳反応に対する第２の刺激による第１の脳領野での脳反応の遅延時間と、第２の刺激による第２の脳領野での脳反応に対する第１の刺激による第２の脳領野での脳反応の遅延時間と、に基づいて、第１の刺激による第１の脳領野の反応と、第２の刺激による第１の脳領野の反応と、が重複せず、第２の刺激による第２の脳領野の反応と、第１の刺激による第２の脳領野の反応と、が重複しない、第１の刺激の開始時刻及び終了時刻と、第２の刺激の開始時刻及び終了時刻とを算出し、算出した前記第１の刺激の開始時刻と終了時刻とを第１の刺激出力部に設定し、算出した前記第２の刺激の開始時刻と終了時刻とを第２の刺激出力部に設定する。【選択図】 図５
