Good points re scientific measurement of the brain/CNS.
Pathology there could cause “mental” problems.
Recently at our church, two women an onset of mental changes, had both EEGs and FMRI’s. One had a cancer and one had an aneurysm. They both had successful operations.
The woman with the cancer removal has returned from psycho bitch (her words), to Nice Lady!
The lady with the aneurysm is back to enjoying life, even if she for the time being needs to use a walker. I bought her a squeeze horn for her walker, and she loves it.
One of the most bizarre (similar) incident, A 25 year old daughter of a friend went rapidly from nice young lady to psycho bitch. The frontal MRI showed some severe TMJ problems. Fortunately she was referred to a super dentist who uses the replaceable dental inserts to correct a severe overbite and other problems. Within a few months the young woman is back to being the nice young lady. Her problems were diagnosed by a neurologist, who looked at her previous MRI requested by an ER doc and referred her to the orthodontist. Who confirmed the TMJ diagnosis.
Perfect!