When brain surgery is performed and the patient is asked to read or sing to induce brain activity, does the doctor see the brain activity?
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Answer 1
March, 2021Since all brain activity is imperceptible electrical impulses, the doctor does not see it directly with his eyes. Only through registration devices.
Answer 2
March, 2021Of course, because for this the patient is asked to perform some action. You can see activity using two main methods: electroencephalogram or functional MRI. During brain surgery, fMRI cannot be done, but as far as I know, EEG is often used. With this method, you can see the waves of brain activity that correspond to a certain type of activity.
Sometimes patients are asked to perform such actions in order to find out if important areas of the cerebral cortex have been affected during the operation. In this case, the patient will not be able to distinguish the figures in the pictures (if the operation is in the occipital zone) or will stop singing, hearing, and so on.