Which period is associated with the discovery of risk genes and neural basis emphasis in schizophrenia research?

• A. Mid-20th century advancements
• B. 21st century developments
• C. 19th century view
• D. Onset in late adolescence

Answer: (B)

The period that brought genetic risk identification and a strong neural basis focus to schizophrenia research is the 21st century. In recent years, large-scale genome-wide association studies revealed many genetic risk factors, highlighting a polygenic architecture where numerous genes each contribute small effects. At the same time, advances in neuroimaging and brain network analysis shifted attention to how these genetic risks relate to neural development and connectivity, involving circuits across prefrontal regions, hippocampus, and other connected systems. This contrasts with earlier times where the emphasis was more on clinical descriptions, phenomenology, or pharmacologic treatment breakthroughs, and with older, 19th-century views that did not incorporate modern genetics or brain-imaging evidence. So, the era of discoveries linking risk genes to the neural underpinnings of schizophrenia is the 21st century.