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Good Vibrations: Hacking Motion Sickness on the Cheap. I think I took a CPR class once. A pill is *not* a good enough fix. Symptoms. Nausea Vertigo Fatigue Pale, clammy skin Increased salivation Hyperventilation. History. First happened when man tried to improve natural mobility

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Presentation Transcript
  • Nausea
  • Vertigo
  • Fatigue
  • Pale, clammy skin
  • Increased salivation
  • Hyperventilation
  • First happened when man tried to improve natural mobility
  • First recorded account came from Ancient Greece
    • Happened on the water
    • Coined the term nausea
  • 90% of the world’s population suffer from motion sickness at least once
  • 300 million of the U.S. experience it
    • 9 to 75 million have a debilitating response
    • 2 million have to visit the doctor
who is at risk
Who is at Risk
  • Some feel the effects worse than others
  • Predisposition to motion sickness can be inherited
  • Some races feel it worse than others
  • Others with increased susceptibility to it:
    • Pregnant women
    • Frequent migraine sufferers
    • People with anxiety disorders
motion sickness can occur
Motion sickness can occur…
  • In an automobile, or
    • Train
    • Bus
  • On a plane
  • While playing video games
  • On a boat
theories of causation

Theories of Causation

Disproven Theories

disproven theories
Disproven Theories
  • “Blood and Guts”
  • Respiratory Issues
  • Reaction to shock to CNS and/or ANS
  • Infection
  • Overstimulation
foveal slip
Foveal Slip
  • Fixation disparity leads to lack of visual acuity
  • Occurs when there is a misalignment of the eye
  • Can be horizontal and/or vertical
  • Results in over- or under-convergence of eyes at a fixation point
foveal slip1
Foveal Slip
  • Misalignment of the fovea is only a few arcminutes
    • One-sixtieth (1/60) of a degree
  • Foveal slip eventually leads to depth perception problems
foveal slip2
Foveal Slip
  • Foveal slip leaves one unable to accurately track motion with their eyes
  • Definite correlation between foveal slip and motion sickness
    • Occurs during opti-kinetic stimulation
    • Increased fixation disparity leads to increased foveal slip, which leads to worse manifestations of motion sickness
theories of causation2

Theories of Causation

Motor-Sensory Conflict Theory

motor sensory conflict theory
Motor-Sensory Conflict Theory
  • Defense mechanism to protect against neurotoxins
  • Signals sent to brain from the eyes and vestibular system contradict each other
  • Body can not sustain homeostasis
prevention methods
Prevention Methods
  • Sit where motion is felt the least
  • Don’t read
  • Keep head and body still
  • Face forward in a reclining position
  • Keep eyes on the horizon
  • Keep window open
  • Don’t drink or smoke
  • Eat small, low-fat, bland, and starchy foods
natural remedies
Natural Remedies
  • Powder or liquid ginger
  • Use acupuncture, acupressure, or mild electrical pulse at:
    • Neiguian or Pericardium (3 finger widths above the wrist)
    • Small intestine 17 (just below the earlobes, in the indentations behind the jawbone)
  • Diphenhydramine
    • Active ingredient in sleep aids
    • Cannot be used with infants
    • Not good for elderly, pregnant, or breast-feeders
    • Not good for people with glaucoma, heart disease, constipation, or enlarged prostate
moar drugs
Moar Drugs!
  • Antihistamines
    • Most effective 30-60 minutes before a trip
    • Side effect: drowsiness and less alert
    • Shouldn’t be used by people with emphysema or bronchitis
das goods1
Das Goods
  • Uses Pure Data to produce a signal in the .01-10 kHz range
  • Chosen because that’s the range for typical head movements
  • Works using the motor-sensory theory as a basis
stroboscopic glasses
Stroboscopic glasses
  • Mounted just outside the wearer’s peripheral vision
  • Lights flash at 20 Hz with 8 ms dwell time
  • Prevents your eyes from going into a foveal slip
  • Shouldn’t cause epileptic seizures
material list
Material List
  • Sunglasses (Dollar Store)- $1
  • LilyPadArduino 168 Main Board (SparkFun)- $20.95
  • LilyPad E-Sewing Kit (SparkFun)- $49.35
  • Baseball cap (closet)- Free