nausea vertigo fatigue pale, clammy skin increased salivation hyperventilation
TRANSCRIPT
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Good Vibrations:Hacking Motion
Sickness on the Cheap
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I think I took a CPR class once
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A pill is *not* a good enough fix
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Symptoms
• Nausea• Vertigo• Fatigue• Pale, clammy skin• Increased salivation • Hyperventilation
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History
• First happened when man tried to improve natural mobility
• First recorded account came from Ancient Greece– Happened on the water– Coined the term nausea
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Statistics!
• 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
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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
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• In an automobile, or– Train– Bus
• On a plane• While playing video
games• On a boat
Motion sickness can occur…
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Yeah, but they don’t
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Theories of Causation
Disproven Theories
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Disproven Theories
• “Blood and Guts”• Respiratory Issues• Reaction to shock to CNS and/or ANS• Infection• Overstimulation
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Theories of Causation
Foveal slip
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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
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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
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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
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Theories of Causation
Motor-Sensory Conflict Theory
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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
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Current Prevention Techniques and
“Treatment”
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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
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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)
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Drugs!
• 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
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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
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Das Goods
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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
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http://www.tottenkoph.com/strobe.txt
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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
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Seizure Warning
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Material List
• Sunglasses (Dollar Store)- $1• LilyPad Arduino 168 Main Board
(SparkFun)- $20.95• LilyPad E-Sewing Kit (SparkFun)- $49.35• Baseball cap (closet)- Free
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EOF
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