Research of conditions of stimulus for inducing grasping force control reflex

Humans can change their grasping force before the grasped object unconsciously slips off their fingers. This reflex is called the grasping force control reflex. This paper describes the methods used to induce reflective grasping force control and presents the observed results. To clarify the stimulus conditions needed to induce reflective grasping force control, we developed an observation device with piezoelectric actuators and a force sensor. Vibration stimuli and force senses were presented to a human finger, and a change in the grasp force was observed by the force sensor. In this study, we changed the parameters of the vibration stimuli and force senses and detected the difference in the grasp force.