posted on Dec, 29 2003 @ 08:31 PM
Alzheimers involves the deterioration of mostly teh frontal lobes, then the temporal lobe and hypocampus should things progress so far, which is rare.
Signs point to it being mostly organic/genetic, though some claim it to be chemicaly cause. I personally believe it to be a combination thereof.
Parkinsons is by an large a new disease, caused by various chemicals (mostly found in fertilizers and other argricultural products) compounding
between synapses and degenerating motor control, mental processes, ect.