DEVICE FOR THE PRESENTATION OF TACTILE STIMULI WITH CONCURRENT EEG RECORDING

摘要

The invention relates to a mechanical/electronic device for presenting surfaces with different textures. The device includes a rotating platform provided with 12 coupling cavities used for the insertion of stimuli with different textures and to present same to the user's fingertip. The rotational speed of the platform can be controlled within a wide range (from 0.029 rad/sec to 0.41 rad/sec) using a direct-current servomotor. A set of keys and photoelectric sensors can be used to identify the stimuli and to send synchronisation signals signalling the beginning of the tactile exploration to external devices such as electroencephalographic recording devices. The electrical synchronisation signals consist of a four-bit code stored temporarily in a buffer in order to be transmitted to the external device at the precise moment at which the stimulus touches the user's fingertip.