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Depression is common and associated with considerable health disability. Traditional antidepressants mainly work by modulating monoamine levels in the synaptic cleft; however, the evidence that depression is caused by impaired serotonin or noradrenaline activity is weak and inconsistent, and indeed
Idiopathic Parkinson's disease (PD) is a progressive neurodegenerative disorder of unknown etiology, characterized by bradykinesia (slowness of movements) associated with tremor at rest and/or muscle rigidity. PD is typically associated with a significant loss of dopaminergic neurons in the
Major depression represents a major public health problem worldwide and in the U.S. Fifteen percent of the U.S. population has depression at some point in life (40 million individuals), with a female to male ratio 5:2. Presently, 6-8% of all outpatients in primary care meet diagnostic criteria for