چكيده به لاتين
In this thesis we have studied coding of vision information and the effect of movements on it in mice. To achieve that, we have used Spike and LFP signals captured by multi-electrodes planted in V1 and LM regions of mice’s brain. Coding was studied for three purposes. In the first step, by using Spike’s information, the preferred and un-preferred stimulations have been classified. The results show that by utilizing Average Firing Rate of each neuron, the accuracy of classification can reach up to 94% for the first order vision stimulation and 95% for the second order vision stimulation. To study temporal features, the time interval of each trial has been divided into five sub-intervals. A severe reduction in classification accuracy occurred by using the new feature.
In the second step, for the first time, the possibility of decoding first and second order stimulations, based on LFP signal has been studied. For this purpose, temporal and frequency information of LFP signal has been utilized separately though almost no significant result is reported.
In the last step, the effect of movement on neural activity has been studied. We showed that movements have effect on some of the neurons in vision areas of brain. This effect can be so strong in some aspect that can increase average firing of some neurons up to 3 time.
Results of this thesis shows that utilizing any of Spike or LFP signals can help us in decoding of first and second order vision stimulations in V1 and LM regions. Also movements have strong effect on the quality of the coding of vision information in brain which can question the exclusivity of different areas of the brain in the processing of sensory information.
Keywords: Vision Information Coding, Awake Invasive Recording, Effect of Movement on Vision, Local Field potential
