Selective analysis of neuron orientation based on phase and amplitude coupling

Inhalt:
The EEG signals generated by the regular discharge of neurons in the brain reveal the mechanism of the brain's perception of the outside world, orientation selectivity is a fundamental property of visual cortical neurons and plays a crucial role in pattern perception. But the specific mechanism and principle of action are not very clear. In this paper, rhesus macaques were used as experimental subject to analyze the neuronal orientation selectivity. In order to investigate the relationship between the strength of phase-amplitude coupling and the orientation selectivity of neurons in the V1 and V4 regions under grating stimulation, PAC (phase-amplitude coupling) was used to process the microelectrode signals of macaque’s brain. We analyze the results , find that there is a strong correlation between the strength of PAC and the change of the grating orientation.The PAC intensity changes regularly as the orientation of the grating changes. The circular variance (CV) is used to quantitative the tuning curve of PAC. In summary, PAC provide a new research direction to reveal the neuronal orientation selectivity.