34 years
C'est la troisieme fois que lorsque je suis dans une place chaude je commence a avoir la nausee et une forte transpiration et puis la vertige, pouquoi? C'est un homme qui a 40 ans.
Sep 9, 2014
The vagus nerve is the central player of the parasympathetic nervous system, one of two components of the autonomous nervous system.
The autonomic nervous system, the branch of the nervous systems that is responsible for involuntary functions (such as respiration, heartbeat, digestion etc.) is made up of two polar opposite systems that exert complementary mirror image functions in order for the body to maintain homeostasis (inner-stability).
The sympathetic nervous system thrives on adrenaline and cortisol and is part of the fight-or-flight response, the mechanism by which the body reacts to and deals with stressful or life-threatening conditions and situations. The parasympathetic nervous system, on the other hand, is the polar opposite. The vagus nerve is command central for the function of your parasympathetic nervous system. It acts by slowing body functions: it lowers heart rate, blood pressure, and helps your heart and organs slow down.
A healthy vagal tone is indicated by a slight increase of heart rate during inhalation, and a decrease of heart rate during exhalation. Deep diaphragmatic breathing—with a long, slow exhale—is vital to stimulating the vagus nerve and slowing heart rate and blood pressure, especially in times of stress or anxiety. A higher vagal tone index is linked to physical and psychological well-being.
The vagus nerve is continuously sending information about the condition of the body's organs to the brain. To close the feedback loop, messages also travel from the brain, through the vagus nerve, to the organs, allowing for an inner-calm necessary for resting and digestion during times of safety or to prepare your body for “fight-or-flight” in dangerous situations.
To our body’s dismay, the vagus nerve’s reflexive responses can backfire and become an inconvenience. Anytime the psyche is under stress (whether physical, such as trauma or extremes of temperature, or psychological, as in the case of an important event, feeling intimidated, angry or insecure), the vagus nerve interprets it as an actually dangerous situation which exacerbates these negative responses.
All of the physical symptoms of stress or anxiety—racing heart, sweaty palms, dry mouth, upset stomach, nausea &/or vomiting, tremors—are the result of your vagus nerve disengaging.
Management is simply preventive: try to be in locations where the temperature is at a comfortable level. Drink plenty of fluids.
If symptoms get worse or occur more often, seek medical attention, as more serious underlying conditions may be causing these symptoms.
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