Why do we stop listening (concentrating) after a long period of time—for example in class?

Is there a certain time during foetal development that can be associated with dopamine inbalance?

Is there a possible passive vaccine for Alzheimer's? (Antibodies directed against the protein found in the senile plaque)

Are nutrition and exercise good complementary treatments for schizophrenia?  

I've read that patients suffering from schizophrenia have high levels of dopamine. Are high dopamine levels the cause of schizophrenia or a consequence?

Is it true that antipsychotic drugs can produce Parkinson's disease in the long run?

Is electric shock therapy still used and, if so, what are the risks associated with it?

Why was aluminium thought to be a factor in Alzheimer's Disease?

How many years does it take Alzheimer's Disease to develop before it can be diagnosed?

Is an impulsive person at higher risk for Bulimia ?