Abstract

We present direct evidence of the polarized light effect of coherence in computational neuronal dynamics in female, but not male mice brain. We measured the accumulation of [18F] fluorodeoxyglucose ([18F]FDG) in mouse brain using small animal positron emission tomography and magnetic resonance imaging (PET/MRI) during light stimulation with yellow and polarized filters compared to dark condition. Fourier analysis was performed using mean standardized uptake values (SUV) of [18F]FDG for each stimulus condition to derive the spectral density coefficients for analysis and spectral plots of cross-correlation function, cross amplitude, phase spectrum, gain, coherency and multiple regression analysis. PET images show gender differences during polarized light stimulation, with greater tracer accumulation in the visual cortex in female than in male mice. In male mice, there was classical superposition of waves of polarized and yellow lights, shown by significantly attenuated long-term depression at cortical C-peak in the ventral stream of the left visual cortex. Conversely, in female mice, polarized light particle evoked accentuated long-term potentiation at subcortical S-peak in the dorsal stream in the right visual cortex. Coherence may occur in the visual system in female mice within the cortical ‘cytochrome oxidase (CO) blobs’, which are spatially and functionally connected through nested hierarchical neural networks of structures implicated as environment for non-trivial features such as coherence.

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