People with lower levels of magnesium in their blood have a higher severity of obstructive sleep apnea, measured by the number of breathing interruptions per hour, especially when magnesium levels...
Mechanism
Synthesis from 1 study
Low magnesium makes nerves in the throat fire too much and weakens the muscles that hold the airway open. It also causes swelling and damage in the throat tissues. Together, this makes the airway collapse more easily during sleep, causing breathing pauses.
Most probable mechanism
Low magnesium causes nerves and muscles in the throat to become overactive and weak, while also triggering swelling and damage in the airway tissues. This makes the airway more likely to collapse during sleep, leading to breathing pauses.
Magnesium deficiency reduces blockade of NMDA receptors, increasing calcium influx into neurons and enhancing excitatory glutamatergic signaling in the central nervous system.
Magnesium deficiency impairs GABAergic inhibition, reducing chloride ion influx and decreasing neuronal hyperpolarization, which further elevates neural excitability.
Magnesium deficiency fails to inhibit calcium channels in peripheral sensory and motor neurons, leading to unopposed calcium influx and spontaneous firing of nerves controlling upper airway muscles.
Magnesium deficiency reduces Na+/K+-ATPase activity, destabilizing membrane potential and impairing neuromuscular conduction in pharyngeal dilator muscles.
Magnesium deficiency impairs glutathione synthesis, increasing reactive oxygen species and oxidative damage to upper airway tissues.
Oxidative stress activates the NF-kB pathway, increasing production of TNF-alpha and IL-6, which cause inflammation and edema in the pharyngeal soft tissues.
Inflamed and edematous upper airway tissues, combined with weakened and hyperexcitable pharyngeal muscles, increase collapsibility during sleep when muscle tone naturally decreases.
Less supported by current evidence, but not ruled out
Low magnesium reduces the production of melatonin, the hormone that signals sleep time, leading to misaligned sleep cycles and fragmented sleep that worsens breathing disruptions.
Magnesium deficiency reduces activity of serotonin N-acetyltransferase, the enzyme that converts serotonin to melatonin.
Lower melatonin levels decrease activation of MT1/MT2 receptors in the suprachiasmatic nucleus, disrupting circadian regulation of sleep onset and maintenance.
Circadian misalignment increases nighttime awakenings and reduces deep sleep, which lowers upper airway muscle tone and increases apnea frequency.
Low magnesium allows more stress hormone to enter the brain, keeping the nervous system overly active at night and preventing the deep relaxation needed to keep the airway open.
Magnesium deficiency reduces P-glycoprotein function at the blood-brain barrier, increasing corticosteroid entry into the brain.
Elevated central cortisol levels enhance sympathetic nervous system activity and suppress parasympathetic tone during sleep.
Increased nighttime arousal prevents full muscle relaxation in the upper airway, promoting collapse and apnea events.
Evidence from Studies
Supporting (1)
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The Mechanisms of Magnesium in Sleep Disorders
Contradicting (0)
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