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Dysautonomia, autonomic failure, or autonomic dysfunction is a condition in which the autonomic nervous system (ANS) does not work properly. This may affect the functioning of the heart, bladder, intestines, sweat glands, pupils, and blood vessels. Dysautonomia has many causes, not all of which may be classified as neuropathic. [5]
In primary dysautonomias, the autonomic dysfunction occurs as a primary condition (as opposed to resulting from another disease). Autonomic failure is categorized as "primary" when believed to result from a chronic condition characterized by degeneration of the autonomic nervous system, or where autonomic failure is the predominant symptom and ...
Familial dysautonomia ( FD ), also known as Riley-Day syndrome, is a rare, [2] progressive, [3] recessive genetic disorder of the autonomic nervous system [2] that affects the development and survival of sensory, sympathetic, and some parasympathetic neurons in the autonomic and sensory nervous system .
The autonomic nervous system is a control system that acts largely unconsciously and regulates bodily functions, such as the heart rate, its force of contraction, digestion, respiratory rate, pupillary response, urination, and sexual arousal. [2] This system is the primary mechanism in control of the fight-or-flight response .
Autonomic neuropathy (AN or AAN) is a form of polyneuropathy that affects the non-voluntary, non-sensory nervous system (i.e., the autonomic nervous system), affecting mostly the internal organs such as the bladder muscles, the cardiovascular system, the digestive tract, and the genital organs.
Pure autonomic failure originates from peripheral autonomic nervous system lesions. [6] The diagnosis of pure autonomic failure relies on the absence of other neurologic abnormalities, specifically Parkinsonism, cognitive impairment, cerebellar ataxia, or tremors, and on compatible clinical features of subtle, progressive pan autonomic failure ...
Familial dysautonomia is a genetic disorder that affects the development and survival of certain nerve cells. The disorder disturbs cells in the autonomic nervous system, which controls involuntary actions such as digestion, breathing, production of tears, and the regulation of blood pressure and body temperature.
Orthostatic intolerance ( OI) is the development of symptoms when standing upright that are relieved when reclining. [1] There are many types of orthostatic intolerance. OI can be a subcategory of dysautonomia, a disorder of the autonomic nervous system [2] occurring when an individual stands up. [3] Some animal species with orthostatic ...