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t. e. In physiology, a stimulus [1] is a detectable change in the physical or chemical structure of an organism's internal or external environment. The ability of an organism or organ to detect external stimuli, so that an appropriate reaction can be made, is called sensitivity ( excitability ). [2] Sensory receptors can receive information ...
Reaction formation. In Sigmund Freud ’s psychoanalytic theory, reaction formation ( German: Reaktionsbildung) is a defense mechanism in which emotions and impulses which are anxiety -producing or perceived to be unacceptable are mastered by exaggeration of the directly opposing tendency. [1] [2] The reaction formations belong to Level 3 of ...
Neurology. Congenital insensitivity to pain ( CIP ), also known as congenital analgesia, is one or more extraordinarily rare conditions in which a person cannot feel (and has never felt) physical pain. [1] The conditions described here are separate from the HSAN group of disorders, which have more specific signs and cause.
Pain tolerance. Pain tolerance is the maximum level of pain that a person is able to tolerate. Pain tolerance is distinct from pain threshold (the point at which pain begins to be felt). [1] The perception of pain that goes in to pain tolerance has two major components. First is the biological component—the headache or skin prickling that ...
D009619. Anatomical terminology. [ edit on Wikidata] A nociceptor (from Latin nocere 'to harm or hurt'; lit. 'pain receptor') is a sensory neuron that responds to damaging or potentially damaging stimuli by sending "possible threat" signals [1] [2] [3] to the spinal cord and the brain. The brain creates the sensation of pain to direct attention ...
Retrieved 12 January 2015. Pain is an unpleasant sensory and emotional experience associated with actual or potential tissue damage, or described in terms of such damage Alt URL [permanent dead link] Derived from Bonica JJ (June 1979). "The need of a taxonomy". Pain. 6 (3): 247–248. doi: 10.1016/0304-3959 (79)90046-0.
The fear-avoidance model (or FA model) is a psychiatric model that describes how individuals develop and maintain chronic musculoskeletal pain as a result of attentional processes and avoidant behavior based on pain-related fear. [1] [2] [3] Introduced by Lethem et al. in 1983, this model helped explain how these individuals experience pain ...
Inflammation (from Latin: inflammatio) is part of the biological response of body tissues to harmful stimuli, such as pathogens, damaged cells, or irritants. [1] [2] The five cardinal signs are heat, pain, redness, swelling, and loss of function (Latin calor, dolor, rubor, tumor, and functio laesa ). Inflammation is a generic response, and ...