Spatial Disorientation Flashcards
What provides orientation inputs to the central nervous system and in what percentage?
1) Visual = 80%
2) Vestibular = 10%
3) Proprioceptive = 10%
What do the Otolith Organs provide?
- Linear Acceleration
- Tilt sensation
- Gravity sensor
What do the Semicircular canals provide?
- Angular acceleration (sense of turning/rotation)
- Visual stability
What are the propriocentors?
- Joints, muscles, tendons skins
- Touch, pressure, joint position, muscle stretch
What is the definition of spatial disorientation?
The failure to correctly sense the position, motion or attitude of yourself, or your aircraft, in relation to gravity and the Earth’s surface.
What are the 3 main factors that contribute to SD?
1) Degraded Visual Cues
2) Human Factors
3) Accelerations effects
What are the types of disorientation?
1) Unrecognized
2) Recognized
3) Disorientation stress
What are Somatogravic illusions?
Tendency to pitch down when accelerating, and pitch up when decelerating.
What is G excess illusion?
Tendency to roll into the turn with the sensation that you are pulling out of the turn at high G.
What are the Leans?
False sensation of roll attitude when rolling out of a turn causing the pilot to lean over.
What are Somatogyral illusions?
- False sensation of rotation when still, no sense of rotation when turning.
- Can occur on spin recovery
What is the Coriolis illusion?
Sensation of tumbling when looking/leaning down to program FMS when turning.
