抄録
There are patients that cannot produce bioelectric signals such as patients with advanced stages of Amyotrophic Lateral Sclerosis or that have suffered severe spinal cord injury and, therefore, those patients are unable to use bioelectrical signal based assistive devices such as the RobotSuit HAL. The objective of this paper is to evaluate the hybrid sensor probes that can measure both optical and bioelectrical signal of a same spot simultaneously. The hybrid sensor consists of holography laser modules and electrodes. The holography laser modules contain emitter and receiver inside it. In order to evaluate the hybrid sensor system, we compared the signals that were measured on the forehead using 8 hybrid sensor probes with the signals that were measured using the optical topography system in two tasks of the stroop tests. In task 1 that the participant read out the characters or its color, the difference between the rest and the task measured by the hybrid sensor was clearer than measured by the optical topography system. In task 2 that the participant pushed the button to answer the characters or its color, the difference between the rest and the task measured by the hybrid sensor was clearer than the signal measured by the optical topography system. Total hemoglobin also increased, but the difference was not clearer than in the task 1. In this research, we compared the signals that were measured on the forehead using 8 hybrid sensor probes with the signals that were measured using the optical topography. We were able to detect the difference between the task period and the rest period more clearly using the hybrid sensors than using the optical topography system. Therefore the hybrid sensor system was enough to measure the brain activity.
