The Phrenic nerve is a bilateral nerve that originates from the cervical spine (C3-C5) and innervates both hemidomes of the respiratory diaphragm, the primary muscle involved in breathing. It is the only source of motor innervation to the diaphragm, and therefore plays a crucial role in breathing.
When the tongue is sealed to the upper palate (Kechari Mudra), it activates specific neural pathways, associated with the phrenic nerve, facilitating better communication between the brain and the diaphragm. This activation helps ensure proper breathing mechanics and optimal respiratory function. Nasal breathing filters, humidifies, and warms the air before it enters the airway and reaches your lungs, reducing the risk of respiratory irritation and infections. It also promotes better oxygen uptake and helps maintain optimal levels of carbon dioxide in the blood, improving respiratory function, athletic performance, and an overall sense of vitality. One of the most fascinating aspects of nasal breathing is the production of nitric oxide, which dilates blood vessels, stimulates hormone release, regulates neurotransmission, and acts as a signaling molecule. Nitric oxide (NO) is produced in high concentration by the endothelial cells and mucosal lining of the paranasal sinuses and has various health benefits, including lowering blood pressure and improving immune function. "Inhaling through your nose, you're getting nitric oxide to a lot of tissues, vessels, and organs that need it," writes James Nestor in his book "Breath." "The gas helps dilate blood vessels and increases blood flow and oxygen delivery throughout the body." Nitric oxide plays a crucial role in various aspects of health. It dilates blood vessels, improves blood flow, regulates blood pressure and prevents pulmonary hypertension. Research has shown that nitric oxide deficiency is linked to several health concerns including cardiovascular diseases and hypertension, as well as cognitive decline, slow wound healing and fatigue. Additionally, nitric oxide deficiency has been implicated in erectile dysfunction, as it affects the ability of blood vessels to relax and allow adequate blood flow to the genital area. Therefore, maintaining optimal levels of nitric oxide is essential for overall cardiovascular health and function, as well as sexual health. These interconnected components highlight the intricate coordination between the tongue, phrenic nerve, and respiratory diaphragm, essential for vital functions such as breathing, down-regulating the nervous system, and vasodilation.
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