Which brain structure relays nociceptive signals from the spinal cord to the cerebral cortex in the described pain pathway?

• A. Thalamus
• B. Cerebellum
• C. Hypothalamus
• D. Medulla

Answer: (A)

The thalamus acts as the central relay station for nociceptive information traveling from the spinal cord to the cerebral cortex. After signals from nociceptors enter the dorsal horn, they cross and ascend via the spinothalamic tract to the thalamus, which then distributes them to the cortex for conscious perception, localization, and discrimination of pain. The cerebellum handles movement coordination, not sensory relay to cortex; the hypothalamus governs autonomic and hormonal responses; and the medulla participates in autonomic functions and pain modulation but is not the primary pathway for transmitting pain signals to the cortex.