Autonomic Disturbances

Autonomic disturbances are disorders of the autonomic nervous system, which regulates involuntary functions such as heart rate, blood pressure, digestion, sweating, and pupil responses. They arise when communication between central autonomic centers, peripheral nerves, and target organs is disrupted, producing excessive, reduced, or poorly coordinated sympathetic and parasympathetic activity. Symptoms may include dizziness on standing, abnormal heart-rate control, gastrointestinal dysfunction, altered sweating, and bladder problems. In neuroscience, studying autonomic disturbances helps researchers connect neural circuits with visceral regulation, distinguish central from peripheral dysfunction, and evaluate conditions such as autonomic neuropathy, neurodegenerative disease, and dysautonomia.

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JoVE Core - Biology

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An ecological disturbance is a temporary disruption in the environment resulting from abiotic, biotic, or anthropogenic factors, causing a pronounced change in an ecosystem. The impact of an ecological disturbance, which can depend on its intensity, frequency, and spatial distribution, plays a significant role in shaping the species diversity within the ecosystem.Ecological disturbances can be caused by an event as small as the trampling of underbrush to an incident as wide-ranging as a forest...

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JoVE Journal - Medicine
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Cited by 179 •

2011

Standardized, comprehensive and fully quantitative testing of autonomic functions is described. The autonomic tests consist of evaluation of all three major autonomic domains including cardiovagal, adrenergic and sudomotor. The severity and distribution of dysautonomia is quantitated using Composite Autonomic Severity Scores.

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Arrhythmia or dysrhythmia refers to an abnormal heart rhythm caused by a defect in the heart's conduction system. It can cause the heart to beat irregularly, too quickly, or too slowly, leading to symptoms like chest pain, shortness of breath, and fainting. Factors such as stress, caffeine, alcohol, nicotine, cocaine, certain drugs, congenital defects, diseases, and electrolyte abnormalities can trigger arrhythmias. Arrhythmias are categorized by their speed, rhythm, and origin. A slow heart...

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2025

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2025

Source: Sharma, T. P., et al., Translaminar Autonomous System Model for the Modulation of Intraocular and Intracranial Pressure in Human Donor Posterior Segments. J. Vis. Exp. (2020).This video demonstrates the procedure of preparing a human eye to study the effects of translaminar pressure on retinal ganglion cell signaling by simulating intraocular and intracranial pressures in a translaminar autonomous system.

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