First published at 14:13 UTC on February 19th, 2024.
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The diving reflex, also known as the mammalian dive reflex, is a physiological response observed in mammals, including humans, when they are exposed to cold water or submerge their faces in cold water. While historically associated with its role in facilitating underwater diving, the diving reflex has garnered interest for its potential therapeutic applications, particularly in anxiety management. Here's a detailed overview of the diving reflex as a treatment for anxiety, including its history, mechanisms of action, and supporting studies:
History:
The diving reflex has been recognized for centuries, with historical accounts of its observation dating back to ancient civilizations. Ancient Greek and Roman scholars noted the physiological changes observed in divers when they submerged themselves in cold water, including a reduction in heart rate and blood flow to peripheral tissues. In the modern era, researchers have investigated the diving reflex in various contexts, including its potential therapeutic effects on stress and anxiety.
Mechanism of Action:
Vagus Nerve Activation: Cold water exposure, particularly to the face, stimulates sensory receptors that relay signals to the brain via the trigeminal nerve. These sensory inputs activate the vagus nerve, a key component of the parasympathetic nervous system responsible for regulating the body's relaxation response. Vagus nerve stimulation leads to a decrease in heart rate..
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