System Realization And Experimental Research On Synchronous "brain-brain" Network Construction Of Pigeons

Information sharing and the interdependence of things are the typical characteristics of the information age,information and objects of the world are closely linked by various ways.Connecting multi-brain to construct the “brain-brain” network has become a research hotspot in the field of Brain and Cognitive Neuroscience.In order to explore the way of constructing the “brain-brain” network and the changes of neural activities in inter-brain and intra-brain.In this paper,we choose pigeon as model animal because of its good coordination ability,design the experimental paradigm and training system for synchronous learning of pigeon neural signals,and construct a synchronous “brain-brain” network among pigeons.Next,we compare and analyze the synchronized learning process of the pigeons,and determine the frequency bands related to the synchronization tasks among the brains from the perspective of neural activity.Finally,we evaluated the connection strength of the “brain-brain” network among pigeons using the method of brain function network.The research results of this paper have positive significance for the realization of future Brainet and the exploration of the working mechanism of brain in social activities.The work done in this paper is summarized as follows:(1)The neural signals synchronization learning experiment paradigm based on neural feedback and training system of pigeons were designed,and the synchronous "brain-brain" network among pigeons was constructed.The training system for the neural signals synchronization learning of pigeons realizes the function of simultaneously recording the behavior and nerve data of three pigeons and analyzing the signal online in real time by communicating the training device,the neural signal acquisition device and the computer.Finally,the above system was used to train three pigeons to realize the task-driven neural signal synchronization,and a synchronous "brain-brain" network among the pigeons was constructed.The validity of the paradigm and system was verified by experimental analysis.(2)The synchronization dynamic analysis of the pigeon's neural signals synchronization learning process was completed.Firstly,the response time window and the characteristic frequency band related to the synchronization task are determined by combining the behavioral data with the LFP signal.The results show that the 20-40 Hz frequency band within 0.5s after the visual cue is presented can reflect the synchronization task.Then,based on the Pearson correlation coefficient and phase lock value,the multi-indicator analysis of the neural synchronization in the pigeon's interbrain synchronization learning process was carried out.The results show that under the condition of meaningful visual cues,and after long-term neurofeedback training,the synchrony among the brains is significantly improved.(3)The connection strength of synchronous “brain-brain” network among pigeons was evaluated by using the method of brain functional network.Firstly,the “brain-brain” network is constructed based on Pearson correlation and PLV respectively,and the network connection strengths of pigeons at different learning periods and under different time window are compared and analyzed.Then,the network topological characteristics of the above-mentioned states are quantitatively analyzed based on complex network theory.The results showed that the intensity of inter-brain network connection increased significantly in trained pigeons with visual cues.