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Spatial orientation (the inverse being spatial disorientation, aka spatial-D) is the ability to maintain body orientation and posture in relation to the surrounding environment (physical space) at rest and during motion. Humans have evolved to maintain spatial orientation on the ground.
The pilot loses the ability to judge the orientation of their aircraft due to the brain's misperception of spatial cues. The graveyard spiral consists of both physiological and physical components. Mechanical failure is often a result, but generally not a causal factor, as it is the pilot's sense of equilibrium which leads to the spiral dive.
The leans is the most common type of spatial disorientation for aviators. Through stabilization of the fluid in the semicircular canals, a pilot may perceive straight and level flight while actually in a banked turn. This is caused by a quick return to level flight after a gradual, prolonged turn that the pilot failed to notice.
The Coriolis effect is a concern for pilots and astronauts, where it can cause extreme disorientation. [14] [15] [5] [16] [17] This happens as pilots turn or rotate their aircraft, while also turning their head. It has been noted as difficult to report, as oftentimes the sensation is difficult to describe. [5]
Changes in gravitational forces, such as the transition to weightlessness during a space voyage, influence our spatial orientation and require adaptation by many of the physiological processes in which our balance system plays a part. As long as this adaptation is incomplete, this can be coupled to nausea, visual illusions, and disorientation."
The subject is placed in the swivel chair, blindfolded, then spun about the vertical axis while keeping their head upright or tilted forward or to the side. The subject is then asked to perform tasks such as determine their direction of rotation while blindfolded, or rapidly change the orientation of their head, or attempt to point at a stationary object without blindfold after the chair is ...
Spatial anxiety (sometimes also referred to as spatial orientation discomfort [1]) is a sense of anxiety an individual experiences while processing environmental information contained in one's geographical space (in the sense of Montello's classification of space), [2] with the purpose of navigation and orientation through that space (usually unfamiliar, or very little known). [3]
The autokinetic effect (also referred to as autokinesis and the autokinetic illusion) is a phenomenon of visual perception in which a stationary, small point of light in an otherwise dark or featureless environment appears to move. [1]