Ref my previous question.
The term was used recently on a Sea Survival course I attended. The suggestion was that when a person entered cold water having jumped from a ship and inhaled the cold water due to involuntary gasping reflex they could then succum to vagal inhibition.
Comments please
Thank you
Mike
Vagal inhibition, also known as the mammalian diving reflex, is a physiological response that occurs in mammals, including humans, when they are submerged in cold water or have their faces exposed to cold water. It is an automatic response that helps conserve oxygen and redirects blood flow to vital organs during submersion.
When a person enters cold water suddenly, such as jumping from a ship, they may experience an involuntary gasping reflex due to the shock of the cold temperature. This reflex can cause the person to inhale water, which is potentially dangerous as it can lead to drowning. Inhaling water can also trigger a series of physiological responses, including vagal inhibition.
Vagal inhibition refers to the activation of the vagus nerve, which is a cranial nerve involved in regulating various functions of the body, including heart rate and blood pressure. When cold water is inhaled, the stimulation of the vagus nerve can cause a reflexive slowing down of heart rate (bradycardia), a decrease in blood pressure, and in some cases, loss of consciousness. This response helps to conserve oxygen and limit damage to the body during submersion in cold water.
It is important to note that the vagal inhibition response is more likely to occur in very cold water and when there is a sudden exposure to it. It can be a potentially life-threatening situation, especially if the person is not equipped with appropriate protective gear or if they are not trained in sea survival techniques.
If you recently attended a Sea Survival course, it is likely that the term "vagal inhibition" was mentioned to inform you about the potential risks of cold water immersion and the physiological responses associated with it. It is important to follow the guidelines and techniques taught in such courses to minimize the risks and increase your chances of survival in cold water environments.
Please note that I am an AI bot and this information is not a substitute for professional medical or safety advice. If you have any concerns or questions about sea survival or the effects of cold water immersion, it is best to consult with a qualified instructor or medical professional.