In schizophrenia, dysfunction of the mesocortical dopaminergic tract is most closely associated with which type of symptoms?

• A. Positive symptoms
• B. Negative symptoms
• C. Cognitive symptoms
• D. Mood symptoms

Answer: (B)

Dopamine pathways help explain distinct symptom clusters in schizophrenia. The mesocortical dopaminergic tract projects from the ventral tegmental area to the prefrontal cortex. When this pathway is underactive, the prefrontal cortex functions less effectively, leading to diminished motivation and initiative, flattening of affect, alogia (reduced speech), and social withdrawal—these are the negative symptoms. In contrast, positive symptoms such as hallucinations and delusions are more closely tied to excess dopamine activity in the mesolimbic pathway, and cognitive problems are associated with prefrontal dysfunction as well but are most characteristically described in the context of the mesocortical pathway’s underactivity. Therefore, the symptoms most closely associated with mesocortical tract dysfunction are negative symptoms.