关键词: 局部场电位, 空间频率, 小波包熵, 调谐特性

Abstract: Spatial frequency is one of the basic properties in visual stimuli, to study the response of neurons in visual cortex to the spatial frequency of stimuli, a method based on wavelet packet entropy of local field potential is proposed. By doing experiments on Long Evans rats, both statistical analysis based on spike per second and analysis based on wavelet packet entropy of LFP are used, the result is that under stimulus of different spatial frequencies, tuning curves of wavelet packet entropy is consistent with tuning curves of spikes in whole, which indicates that the wavelet packet entropy of LFP can be used to measure the spatial frequency selectivity of neurons in visual cortex. The results also suggest better consistency when using wavelet packet entropy of LFP.

Key words: local field potential, spatial frequency, wavelet packet entropy, tuning curve