However, recent studies have shown the reasons. “Scientists from the Karolinska Institutet, Sweden, showed that the brain's serotonin systems in males and females are different. They think they might have found one of the reasons why more women are affected with depression and chronic anxiety than me” Do?Apart from Serotonin, dopamine, norepinephrine, melatonin, insulin and prostaglandins are some other chemicals which affect mood and emotions. Dopamine is also an aromatic compound in organic chemistry. It is a kind of neurotransmitter which controls the movement of emotional responses. Dopamine deficiency can cause not only depression, but also other disorders such as schizophrenia, Parkinson’s disease etc. “Pharmacological treatments support the idea that an overactive dopamine system may result in schizophrenia: Medications that block dopamine receptors, specifically D2 receptors, reduce schizophrenia symptoms. The brain regions known as the thalamus and the striatum are affected by dopaminergic activity” (Gromisch).The neurotransmitter dopamine (DA) and the dopaminergic neurones play an important role in schizophrenia and Parkinson's disease (PD). A decrease in DA in the substantia nigra of the brain has been implicated as the cause of PD. By contrast, it is argued that a functional excess of DA or oversensitivity of certain DA receptors is one of the causal factors in schizophrenia. These factors are reflected in the treatment of both conditions; drugs aimed at increasing DA. Chemistry of Depression.
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