. Coast watch. Marine resources; Oceanography; Coastal zone management; Coastal ecology. system was at the root of the problem. A lack of circulation of blood to the brain was once blamed for motion sickness. And in the late 1800s, researchers began to suspect the inner ear played a role in causing the malady. Today, scientists say a neurosensory mismatch in the brain causes motion sickness, says Dr. Kenneth Koch, a gastroenterologist who has studied the syndrome at the Hershey Medical sensory mismatches begin the process of motion sickness. To study motion sickness in the laboratory, Koch pla
. Coast watch. Marine resources; Oceanography; Coastal zone management; Coastal ecology. system was at the root of the problem. A lack of circulation of blood to the brain was once blamed for motion sickness. And in the late 1800s, researchers began to suspect the inner ear played a role in causing the malady. Today, scientists say a neurosensory mismatch in the brain causes motion sickness, says Dr. Kenneth Koch, a gastroenterologist who has studied the syndrome at the Hershey Medical sensory mismatches begin the process of motion sickness. To study motion sickness in the laboratory, Koch places subjects inside a large rotating vertical drum that creates the illusion of motion. A study subject sits on a stool inside the drum, which has black-and-white vertical stripes painted inside. The drum rotates clockwise around the individual about 10 times per Center in Pennsylvania. It involves three systems — the eyes, the inner ear and sensory receptors called proprioceptors. When these sys- tems are in sync, all is well. But put a person in the cabin of a rocking boat and the cues become mis- matched. The inner ear detects the boat rocking, and the proprioceptors in the soles of the feet sense it too. But since the cabin moves with the passenger, the eyes don't see the motion. Similarly, a child in the backseat of a car sees motion as objects flash by the window, and his or her inner ear senses it. But because the child's body moves with the car, the proprioceptors in the body don't feel the movement. These Within seconds, the individual is visually fooled into believing that he or she is moving and not the drum. But the inner ear and proprioceptors are signaling the brain that the body is still. According to Koch, this sensory conflict provokes motion sickness in approximately 60 percent of the healthy people tested. The Symptoms Causes of motion sickness aside, Koch is also interested in what happens between initial dizziness and the need to heave. To determ
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Keywords: ., bookcentury1900, bookcollectionunclibra, booksubjectoceanography
