Motion sickness, also known as motion sickness, is a general term for motion sickness, seasickness and airsickness. It refers to cold sweat, nausea, vomiting, dizziness and other symptoms caused by excessive exercise stimulation of vestibular balance receptors in human inner ear and excessive bioelectricity of vestibular organs when riding vehicles.
The vestibular organ of the inner ear is the balanced sensory organ of the human body, including three pairs of semicircular canals and the oval sac and balloon of the vestibule. There is ampulla crest in semicircular canal and otolith (also called capsule point) in elliptic capsule, which is the vestibular terminal receptor and can feel the stimulation of various specific motion States. The semicircular canal is stimulated by angular acceleration (deceleration), while the balloon of elliptical sac and balloon is stimulated by horizontal or vertical linear acceleration (deceleration). When the vehicle we ride rotates or turns (for example, the car turns and the plane moves in circles), the angular acceleration acts on the corresponding semicircular canals on both sides of the inner ear. When the hair cells in the ampulla of a semicircular canal are stimulated to bend and deform to produce positive potential, the opposite hair cells bend and deform to produce negative potential (negative voltage), and the exciting or inhibiting electrical signals of these nerve endings are transmitted to the vestibular center through nerves and perceive this movement state; Similarly, when the vehicle has linear acceleration (deceleration) changes, such as car starting, acceleration and deceleration braking, ship shaking and bumping, elevator and airplane lifting, etc., these stimuli cause deformation and discharge of hair follicle hair cells in vestibular elliptic sac and balloon, which are transmitted to the center and are perceived. The generation and transmission of these vestibular electrical signals will not cause adverse reactions within a certain limit and time, but everyone's tolerance for the intensity and time of these stimuli is limited, and this limit is the vertigo threshold. If the stimulus exceeds this limit, there will be motion sickness symptoms. Everyone's tolerance varies greatly, which is not only related to genetic factors, but also influenced by vision, individual physique, mental state and objective environment (such as air smell). Therefore, under the same objective conditions, only some people have motion sickness symptoms.
2. How to prevent and treat carsickness (seasickness, carsickness, airsickness)?
Accurately speaking, carsickness is not a real disease, which is different from the usual diseases. It's just an emergency response of sensitive organisms to over-limit stimuli. Therefore, there is no real radical cure or cure, and the existing prevention and treatment methods are to temporarily relieve symptoms or delay their occurrence.
The best way to prevent and treat motion sickness is to avoid or leave the environment that can cause motion sickness, but this is unrealistic. In the past, many drugs were used to prevent and treat motion sickness, mainly sedative and emetic drugs, such as Cheng Yunning, scopolamine, diazepam, etc., to inhibit central excitement and relieve gastrointestinal spasm. However, these drugs have many side effects, such as slow action, dry mouth, drowsiness and so on, and the curative effect is not ideal. There is a skin patch behind the front ear, which is a slow-release scopolamine. It can be absorbed through the skin, but it still cannot eliminate the inherent side effects of the drug. Other methods, such as sticking navel, pressing Neiguan point, opening window for ventilation and looking forward, are also commonly used, and the effect is extremely limited. There is also vestibular exercise, which, like pilot training, repeatedly stimulates the vestibule for a long time, such as swivel chair, swing, crouching tiger, rowing and so on. To make the vestibule adapt to the habit can achieve the purpose of relieving motion sickness symptoms. But if you stop training or leave the exciting environment, the symptoms of motion sickness will reappear.
In the past, vestibular balance medical experts from all over the world have been committed to the prevention and treatment of motion sickness for a long time, but with little effect, there has been no breakthrough. Now, Professor Hu Guang Ai, director of the Otolaryngology Research Institute of Tianjin No.1 Central Hospital and director of the Vertigo Diagnosis and Rehabilitation Center, and the chief physician, after more than ten years of clinical research, have invented an electronic anti-motion sickness instrument according to the principles of vestibular balance medicine and classical vestibular clinical theory. The instrument generates pulsed electrical signals through electronic oscillation, and then acts on the vestibule, the balance organ of human inner ear, through binaural electrodes, so as to counteract or weaken the excessive bioelectricity generated by excessive movement-linear and angular acceleration (deceleration) stimulation, reduce and prevent vestibular nerve impulses from transmitting to the center, thus improving the tolerance of vestibular organs to various sports stimuli and achieving the purpose of treating motion sickness. This is a brand-new and pioneering treatment for carsickness. In the process of use, users can always keep a clear head, change the state of irritability, thirst and drowsiness when taking sedatives in the past, and make today's journey chic and brisk, so that they can enjoy the beautiful scenery of the motherland and the happiness of modern civilization.
The research project was rated as "the first in the world" by experts, and won the Tianjin Science and Technology Progress Award, the National Invention Expo Silver Award and the national patent (98 3 26062.438+0) successively, and was listed as a scientific and technological innovation promotion product in Tianjin. This product (No.:22603 1, No.98, Jin (Zhun)) was put on the market and was immediately praised by the majority of carsickness patients.