Motion sickness

MOTION SICKNESS
Dr jignesh vora

sense of balance by body
 labyrinth monitors the directions of motion, such as
turning or forward-backward, side-to-side, and up-
and- down motions.
 The eyes observe where the body is in space (for
example, upside down, right side up, etc.) and also
the directions of motion.
 Skin pressure receptors such as those located in the
feet and buttocks sense what part of the body is down
and touching the ground.
 Muscle and joint sensory receptors report what parts
of the body are moving.
 CND processes all information from four other
systems to make some coordinated sense out of it all.

what is motion sickness?
 Motion sickness is a very common disturbance
of the inner ear that is caused by repeated
motion such as from the swell of the sea, the
movement of a car, the motion of a plane in
turbulent air, etc.
 In the inner ear (which is also called the
labyrinth), motion sickness affects the organs
of balance and equilibrium and, hence, the
sense of spatial orientation.

physiology
 Motion is sensed by the brain through three different
pathways of NS that send signals coming from the
inner ear (sensing motion, acceleration, and gravity),
the eyes (vision), and the deeper tissues of the body
surface (proprioceptors)
 When the body is moved intentionally eg. when we
walk, the input from all three pathways is coordinated
by our brain.
 When there is unintentional movement of the body
eg.when driving in a car, the brain is not coordinating
the input, and there is thought to be discoordination
among the inputs from the three pathways

Symptoms
 nausea, vomiting
 dizziness (vertigo)
 sweating
 malaise

Rx
 meclizine
 dimenhydramine
 scopolamine skin patch applied behind the
ear at least four hours

Techniques
 Always ride where your eyes will see the same motion that
your body and inner ears feel.
 In a car, sit in the front seat and look at the distant scenery.
 On a boat, go up on the deck and watch the motion of the
horizon.
 In an airplane, sit by the window and look outside.
 Also, in a plane, choose a seat over the wings where the
motion is minimized.
 Do not read while traveling if you are subject to motion
sickness, and do not sit in a seat facing backward.
 Do not watch or talk to another traveler who is having motion
sickness.
 Avoid strong odors and spicy

Motion sickness

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Motion sickness