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In Raynaud phenomenon, the fingers and toes lose circulation due to emotional stress. What is the cause of this? an interruption in control of ANS neurons autoantibody formation against the neurotransmitter achetylcholine decreased sympathetic stimulation increased sympathetic stimulation

Ask by Davison Gough. in the United States
Mar 11,2025

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The cause of Raynaud phenomenon is increased sympathetic stimulation.

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1. Raynaud phenomenon is characterized by an exaggerated vasoconstrictive response of the digital arteries and arterioles, particularly in the fingers and toes. 2. Emotional stress activates the sympathetic nervous system. 3. The activation leads to the release of norepinephrine, which binds to \( \alpha \)-adrenergic receptors on the vascular smooth muscle. 4. This binding causes vasoconstriction and reduced blood flow to the extremities. 5. Therefore, the underlying cause is increased sympathetic stimulation. The correct answer is: increased sympathetic stimulation.

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In Raynaud phenomenon, the fingers and toes experience vasospasm due to increased sympathetic stimulation. This means that during periods of emotional stress or exposure to cold, the body's fight-or-flight response kicks in, causing the blood vessels to constrict more than usual. This constriction reduces blood flow, leading to the characteristic color changes and discomfort in extremities. To manage Raynaud phenomenon, it’s key to identify triggers such as stress and temperature changes, and to develop coping strategies. Simple techniques like deep breathing, wearing warm gloves and socks, and managing stress through yoga or meditation can significantly reduce the frequency of episodes and improve overall comfort.

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