What is motion sickness?

Motion sickness is a condition that arises when there is a discrepancy between the sensory signals that the brain receives regarding movement. This typically occurs when the inner ear, eyes, and deeper body parts send conflicting messages about motion. For example, when one is traveling in a vehicle, the inner ear senses movement while the eyes may focus on a stationary object inside the car, leading to confusion in the brain. This mismatch can result in symptoms such as dizziness, nausea, and vomiting.

Understanding motion sickness involves recognizing the role of the vestibular system, which is responsible for balance and spatial orientation. When the brain interprets conflicting information about movement, it struggles to maintain a sense of equilibrium, leading to the discomfort associated with motion sickness. This distinct nature of the disorder distinguishes it notably from conditions associated with ear infections, balance and coordination disorders, or dehydration-related syndromes.