You can have both a mental disorder and Parkinson's, but it usually not mistaken for a mental disorder, especially given the specific nature of the tremor. We actually have lavender pillows in my clinic to help people with anxiety and depression. Of course, if someone is suicidal I'm not going to give them a lavender pillow and send them home. Also, there is some exciting aphrodisiac research using sweat gland extract. Men are more compartmentalized, women more global.
Women have fewer brain cells but more connections, women are more prone to dementia.
It could be normal for age, but it could be a sign of beginning hydrocephalus. It is where the grooves in the brain appear wider than normal, perhaps indicating some loss of brain tissue. Sometimes we can change the brain with medications or biofeedback. But sometimes, if the damage is too severe, we don't do much good. Can medications like valium cause depression.