Doesn't Intraventricular Catheter placement damage the brain parenchyma? Is this damage significant? How is it avoided/minimised?
If meditating lowers brain activity and low brain activity is good then how come when you see low brain activities in (brain) PET scans its bad?
If your brain tells you that you hear ringing in you ears, tininitus, why is it so difficult to tell it to stop?
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