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Do you know if there's a detectable em signal when the subject alternates two images or colors in imagination? Say, black-red or black-white. The two colors wou
by akomtu 5y ago
Do you know if there's a detectable em signal when the subject alternates two images or colors in imagination? Say, black-red or black-white. The two colors would supposedly correspond to different energy levels in the brain and that would generate the em wave. The idea was inspired by an old trick: even without wifi hardware, a processor can emit a em wave by alternating between two clockrates.
- mrtnmcc 5y agoFrom my experience, visual imagery / imagination is not discernable in EEG, it simply doesn't produce large scale modulations like the motor cortex does. However with MRI or fMRI I believe it is possible, and have seen papers even reconstructing visualized numbers.
- mrtnmcc 5y agoFollowing up after more thought, we had seen 'tongue motor imagery' (imagination of moving tongue) as clearly discernible in EEG. The motor cortex also has eye muscle mappings nearby. http://mrtnmcc.com/wp-content/uploads/2013/12/motor_imagery.png http://mrtnmcc.com/wp-content/uploads/2013/12/motor_imagery.... So it is conceivable that motor control of the eye or imagination of it could be detected. In the case of imagining dark or light perhaps this could affect pupil/iris dilation muscles.
- akomtu 5y agoWhat range of em spectrum is analysed and what's the sensitivity? I suspect that motor commands produce a blunt low frequency signal, while emotions and thoughts produce something barely discernible.