July 20, 2024

Athens News

News in English from Greece

What's happened "earthly disease"and when it occurs


Seasickness nausea occurs when a person's body tries to get used to the movement of the ship, which leads to a feeling of instability.

But in the case “earthly disease” according to scientific reverse motion sickness syndrome or hard ground syndrome, everything happens exactly the opposite: the human body adapts to the movement of the waves, and then has difficulty returning to homeostasis after reaching solid ground. After leaving the ship, a person may sway or sway. He may even start to feel sick. One of the first known mentions of hard ground syndrome is by Darwin in 1796, who wrote:

“Those who have been on the water for a long time in a boat or on a ship, who have acquired the necessary habits for movement in this unstable element, upon returning to land are often in a lethargic or half-asleep state; they observe the room or some furniture as if it were is in the movement of the boat. I have experienced this myself, and I have been told that after a long swim it takes some time before these symptoms completely disappear.”

As Darwin's description suggests, motion sickness syndrome usually occurs after prolonged sea swimming, although the length of time in the water does not necessarily correlate with the severity of symptoms.

Ships are not the only culprits of the disease. Planes and trains can also make people feel unsettled and anxious. It is estimated that between 43% and 73% of people experience inverse motion sickness syndrome. This disorder can happen to anyone, but women between the ages of 30 and 60, as well as those who suffer from migraines, are most susceptible to it.

The exact cause of inverse motion sickness syndrome is still unknown. One of the leading theories is that constant movement disrupts the functioning of the human vestibular system. Located in the inner ear, it helps people maintain balance and be aware of their body's position in space.

After prolonged exposure to wave-like motion, the human body is usually able to adapt to the new environment. It gets used to constant movement. But as soon as this movement stops, the human brain continues to perceive the surrounding environment as if the waves were still rolling.

This conflicting sensory information confuses the body and disrupts the functioning of the vestibular system, causing the person to experience nausea, unsteadiness and general malaise.

Typically, inverse motion sickness syndrome goes away after a person has been on land for several days, but there have been cases where this condition lasted for months and even years.



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