A few decades ago, they assumed that pain was a form of sensation, like sight, hearing, and touch, that is felt by special nerve endings in the skin and is transmitted through particular nerve fibers to the brain.
कुछ दशकों पहले, उन्होंने मान लिया कि दृष्टि, श्रवण और स्पर्श की तरह दर्द एक प्रकार की संवेदना है ।