Dr. Charles "Pat" Davis, MD, PhD, is a board certified Emergency Medicine doctor who currently practices as a consultant and staff member for hospitals. He has a PhD in Microbiology (UT at Austin), and the MD (Univ. Texas Medical Branch, Galveston). He is a Clinical Professor (retired) in the Division of Emergency Medicine, UT Health Science Center at San Antonio, and has been the Chief of Emergency Medicine at UT Medical Branch and at UTHSCSA with over 250 publications.
Steven Doerr, MD, is a U.S. board-certified Emergency Medicine Physician. Dr. Doerr received his undergraduate degree in Spanish from the University of Colorado at Boulder. He graduated with his Medical Degree from the University Of Colorado Health Sciences Center in Denver, Colorado in 1998 and completed his residency training in Emergency Medicine from Denver Health Medical Center in Denver, Colorado in 2002, where he also served as Chief Resident.
Motion sickness is the feeling you get when the motion you sense with your
inner ear is different from the motion you visualize. It is a common condition
that occurs in some people who travel by car, train, airplane or boat. Many
people suffer from this condition if they ride on a roller coaster or other
similar amusement park rides. Motion sickness progresses from a feeling of
uneasiness to sweating and/or dizziness. This is usually quickly followed by
nausea and/or vomiting.
Who is at risk for motion sickness?
Although pregnant women and children are more susceptible to motion sickness,
almost anyone that is traveling is at risk for motion sickness. For those people
who travel on boats, seasickness can be considered a form of motion sickness.
Other risk factors include the person's fear or anxiety about traveling, the
mode of travel, poor ventilation in the traveling vehicle, and the inability to
see out of a window to aid orientation.
Motion sickness is caused by the mixed signals sent to the brain by the eyes
and the inner ear (semicircular canals). If you cannot see the motion your
body's feeling, or conversely, if you cannot feel the motion your eyes see, then
it is likely that the brain will get mixed signals and the person will develop
some aspect or symptom of motion sickness.
Nausea and vomiting occur for many reasons. Common causes include motion sickness, self-limited illnesses (viruses or food poisoning) that last a few hours to a few days, and toxins (such as certain m"...