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Schizophrenia is often associated with abnormalities in neurotransmitters. Huge amount of dopamine in the limbic system may be responsible for symptoms such as hallucination, while a low amount in the prefrontal cortex is associated with negative schizophrenic symptoms. Theories such as the Dopamine Hypothesis has also been proposed regarding schizophrenia and dopamine. The relationship between dopamine and serotonin is also being studied and explored. 

Biological Causes of Schizophrenia: Neurotransmitters

The dopamine hypothesis posits that schizophrenia is linked to irregularities in the dopamine system. The original theory suggested that the disorder was caused by a general excess of dopamine or an overabundance of dopamine receptors. However, this view has been refined. More recent research indicates that dopamine abnormalities are specific to different brain regions. An oversupply of dopamine in the limbic system is thought to be responsible for positive symptoms like hallucinations and delusions, while a deficit of dopamine in the prefrontal cortex is associated with negative symptoms such as avolition and alogia.

The Dopamine Hypothesis of Schizophrenia

Based on the case study below, describe the likely dopamine activity in two different brain regions that could account for the patient's combination of symptoms.

Neurotransmitter Activity and Schizophrenic Symptoms

A patient is diagnosed with schizophrenia. They experience auditory hallucinations and paranoid delusions. They also exhibit a profound lack of motivation and a flat emotional affect. Based on the neurochemical understanding of this disorder, which statement best explains the likely biological basis for this specific combination of symptoms?

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