Effects on the motor cortex in gamma rhythm in terms of central pattern generator

Abstract

The locomotion is one of the basic skills essential for animals' survival. It is a key research field where the locomotion is modulated by the motor cortex. It is shown by the investigation that the neural oscillations have key roles in neural communication. To assess the impacts on the motor cortex in gamma rhythm based on different frequencies central pattern generator (CPG), it is attempted to establish the model between the motor cortex and the CPG. The primary motor cortex and the primary somatosensory cortex are included in the motor cortex. The effects level is qualified using the power spectrum, spiking time histogram, rastergram, spectrogram in terms of the wavelet analysis and coherence between neural populations. The main findings include (1) The CPG with various frequencies under the gamma rhythm frequency can be embedded in gamma oscillation and the gamma power is modified by the CPG phase. (2) There is an optimal CPG with appreciate frequency and amplitude making the neural populations oscillate for the best action in the gamma band. Therefore, to process the neural population the appropriate stimulus is suitable. (3) When CPGs with different parameters are sent into the neural populations, the coherence difference mainly takes place in the gamma band. Therefore, there is an interaction between the internal dynamics with incoming stimuli providing a substrate for processing the complex information. A beneficial exploration can be provided by the investigation on the information process mechanisms in the motor cortex.