![]() ![]() Recent discoveries about how the body detects, transmits and reacts to painful stimuli, have allowed physicians to relieve both acute and chronic pain. Individuals congenitally insensitive to pain are easily injured and most of them die at an early age.įor thousands of years, physicians have tried to treat pain without knowing the details of the ways in which pain is signaled from the injured part of the body to the brain, or the ways in which any of their remedies worked. Pain travels through redundant pathways, ensuring to inform the subject: “Get out of this situation immediately.” Without these attributes, the organism has no means to prevent or minimize tissue injury. ![]() Sensitivity and reactivity to noxious stimuli are essential to the well-being and survival of an organism. The ability to diagnose different diseases depends to a great extent on the knowledge of the different qualities and causes of pain. Pain information is transmitted to the CNS via three major pathways (Figure 6.1). Nature has made sure that pain is a signal we cannot ignore. The word "pain" is used to describe a wide range of unpleasant sensory and emotional experiences associated with actual or potential tissue damage. Pain is a submodality of somatic sensation. Pain differs from the classical senses (hearing, smell, taste, touch, and vision) because it is both a discriminative sensation and a graded emotional experience associated with actual or potential tissue damage. Most of the sensory and somatosensory modalities are primarily informative, whereas pain is a protective modality. Three pathways carrying pain sensation from the periphery to the central nervous system. ![]()
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