4 ms·
From my experience, visual imagery / imagination is not discernable in EEG, it simply doesn't produce large scale modulations like the motor cortex does. Howev
by mrtnmcc 5y ago
From 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.