Leon C. Ho1,2, Russell W. Chan1,2, Patrick P. Gao1,2, Alex T.L. Leong1,2, Celia M. Dong1,2, and Ed X. Wu1,2
1Laboratory of Biomedical Imaging and Signal Processing, The University of Hong Kong, Hong Kong, China, People's Republic of, 2Department of Electrical and Electronic Engineering, The University of Hong Kong, Hong Kong, China, People's Republic of
Visual inputs are primarily
processed by the visual system. However visual input also interacts with other
sensory cortices to speed up or improve sensory perception. While the effect of
different parameters of visual input to crossmodal influences remains largely
unexplored, this study showed strong low frequency light evoked responses in
auditory cortex, secondary somatosensory cortex, cingulate cortex and caudate
putamen. The activations in those brain regions likely propagated from the
visual cortex and influenced subcortical responses. Our current study provides
a functional understanding to cortical crossmodal processing and its influences
to subcortex upon visual stimuli of different intensities and frequencies.
