The Study Of Brain-Computer Interface Based On Animal Experiments

People hope that we can communicate with environment by the signal of ourbrain activity for many years. Brain-computer interface is a new fashion interfacewhich has been developing these years and it enables people to control devices withbrain signals. In the study of BCI, recording and extracting characteristic brain signalsis the basic and significant requirement. So a system was established to study thebrain-computer interface based on animal experiments. It achieves to record the brainsignals and behaviors synchronously by utilizing electrophysiology and ethologytechnique and provides a reliable signal recording technique for brain-computerinterface.The system consists of behavior recording system and Cerebus 32-ChannelData Acquisition System, which can simultaneously record the free moving rats'behaviors and the brain activities, so that we can study the relativity of the behaviorand the brain activity. The paper focuses on investigating the multi-channel recordingmethods for central neural activities, then puts forward a facture technique of themulti-channel microelectrode. Proved by lots of experiments, the microelectrode canrecord signals with high signal-noise ratio(SNR).We implant the microelectrode in the rat's motor cortex, then record its behaviorsand brain activities by the system. The results indicate that the neural activitiesappeared apparently distinct characteristic rhythm when the rat was in differentbehaviors (such as resting, walking, standing). All of these imply that the method andsystem can be applied in BCI researches.