Vestibular and Visual Systems Flashcards
Spatial Disorientation?
Leading cause of (CFIT)
90% spatial disorientation are fatal
3 components of human orientation?
Visual Systems
Proprioception
Vestibular System
What is Vestibular System?
Organ behind the ear that detect motion
Cannot detect steady motion (Adapt to earths motion)
Functions of Vest. Sys.?
Maintaining orientation to surrounding
Assisting balance and movement
Coordinates eye movement
Components of Vest. Sys.?
Otoliths- Straight line
3 Semicircular Canals- Detect rotation
How does Vestibular work?
Fluid motion detects motion after lag behind body movement
Bad things about Vest.?
Movement can occur body can’t detect
Not acknowledged by brain
When steady state motion is altered?
Sensation of opposite motion
False sensations
Oculo?
Eyes
Somato?
Body
Gyric?
Turning motion
Gravic
Straight line motion
When angular acceleration goes undetected?
3 degrees or less per second
Types of vision?
Central
Periphrial
Blind Spots?
Day- Off center
Night- Central to both eyes
Central vision responsible for?
Best vision, color, rapid focus ability
Periphrial vision responsible for?
Your own motion, motion of objects
Common visual illusions?
Lights as references
False vertical and horizontal motion
Autokeneis
What is effecting scanning?
Move eyes in increments side to side side to front etc.
1 to 2 seconds
What is Autokenesis?
Single lights in the dark are hard to perceive, if you stare it’ll look like its moving
How to defeat autokenesis?
Dont stair into light, scan in triangle
Amount of info from the eyes?
90%
