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Hypersensitivity (also called hypersensitivity reaction or intolerance) is an abnormal physiological condition in which there is an undesirable and adverse immune response to an antigen. [ 1 ] [ 2 ] It is an abnormality in the immune system that causes immune diseases including allergies and autoimmunity .
Sensory processing sensitivity (SPS) is a temperamental or personality trait involving "an increased sensitivity of the central nervous system and a deeper cognitive processing of physical, social, and emotional stimuli". [2]
Sensory processing disorder; Other names: Sensory integration dysfunction: An SPD nosology proposed by Miller LJ et al. (2007) [1] Specialty: Psychiatry, occupational therapy, neurology: Symptoms: Hypersensitivity and hyposensitivity to stimuli, and/or difficulties using sensory information to plan movement. Problems discriminating ...
Type IV hypersensitivity, in the Gell and Coombs classification of allergic reactions, often called delayed-type hypersensitivity, is a type of hypersensitivity reaction that can take a day or more to develop. [1] Unlike the other types, it is not humoral (not antibody-mediated) but rather is a type of cell-mediated response.
Type II hypersensitivity, in the Gell and Coombs classification of allergic reactions, is an antibody mediated process in which IgG and IgM antibodies are directed against antigens on cells (such as circulating red blood cells) or extracellular material (such as basement membrane).
Complaints of electromagnetic hypersensitivity may mask organic or psychiatric illness: in a recent psychological model of mental disorder, [20] Sébastien Point proposed to consider it as a specific phobia. Diagnosis of those underlying conditions involves investigating and identifying possible known medical causes of any symptoms observed. [1]
Type III hypersensitivity, in the Gell and Coombs classification of allergic reactions, occurs when there is accumulation of immune complexes (antigen-antibody complexes) that have not been adequately cleared by innate immune cells, giving rise to an inflammatory response and attraction of leukocytes.
The hypersensitivity of people with PTSD to sensory stimuli is supported by an augmented P300 event-related potential response compared to healthy controls which indicates a semi-permanent heightened attention to deviant and salient stimuli. [9] Obsessive–compulsive disorder (OCD) [11]