The diagram depicts key elements involved in processing pain. Which answer choice correctly labels the numbers in the drawing?

Question

Quizplus · Accepted Answer

1 is labeled as the somatosensory cortex, which is responsible for processing sensory information, including pain. 
2 is labeled as the thalamus, which is the relay center for sensory information. 
3 is labeled as A-delta fibers (fast) and 4 is labeled as C fibers (slow), which are two different types of nociceptor fibers that transmit pain signals to the spinal cord and brain. A-delta fibers are responsible for transmitting sharp, acute pain signals, while C fibers are responsible for transmitting more diffuse, persistent pain signals.

The Diagram Depicts Key Elements Involved in Processing Pain