Here's something I bet you didn't know: you can stimulate brain activity by shining light ... into your ears!
Bright light stimulation was found to increase activity in brain areas related to processing of visual sensory information and tactile stimuli. The findings are the first ever published scientific article about functional modulation of the brain with bright light delivered to the brain through the ears. [...]
"The research results confirm that it is possible to influence brain functions with bright light delivered directly to the brain through the ear," says researcher TuomoStarck from the Oulu University Hospital. "The group that received bright light demonstrated in the analysis significant increase in neural network activity especially in brain areas connected with visual perception."
"There is earlier proof of the existence of photosensitive proteins, such as opsins, in the brain. This study confirms light-responsiveness of the brain itself, and that bright light given through the ear canal is a very viable method for influencing mood," says Professor and Leading Senior Physician Timo Takala from Oulu Deaconess Institute.