the.com/motionsickness
your brain panicking because your eyes and inner ears can't agree on the truth
means the queasy, dizzy, sweaty nausea you feel when traveling — in a car, boat, plane, or even a VR headset — because the motion your inner ear senses doesn't match what your eyes report.
from A transparent compound of "motion" and "sickness." "Motion" comes through Old French from Latin "motio" (a moving), from "movere," to move — the same root behind "move," "momentum," and "motor." "Sickness" is solidly Germanic, from Old English "seoc" (ill). Specific flavors got their own names first: "seasickness" sailed in centuries before cars or planes existed, and the broader umbrella term "motion sickness" only became necessary once humans invented enough new ways to be hurtled around. Its medical cousin is "kinetosis," from Greek "kinesis," movement.
- sensory mismatch
- Eyes say still, inner ears say moving
- evolution's guess
- Brain reads confusion as poison, triggers vomiting
- horizon trick
- Staring at distant fixed points calms the conflict
- reverse version
- Sailors get sick on land after voyages
- astronaut tax
- Most astronauts feel it in zero gravity
darwin's beagle voyage — charles darwin suffered severe seasickness throughout the hms beagle's 5-year journey (1831-1836) despite being a naturalist at sea
space shuttle astronauts — about 50% of astronauts experience space motion sickness in orbit, including john young on sts-1 in 1981
virtual reality users — vr motion sickness affects 25-40% of users due to the disconnect between visual movement and inner ear signals