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Rucker Test 1 > Spacial Dis > Flashcards

Spacial Dis Flashcards

1
Q

What is orientation illusion

A

A false perception of position or motion caused by discordant or erroneous sensory information

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2
Q

What is spatial disorientation

A

A pilots false perception to position, altitude or motion in relation to gravitational vertical or the earths surface

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3
Q

What is the major cause of spatial disorientation?

A

The orientation illusion

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4
Q

What is a degraded visual environment?

A

A state of reduced visibility whereby spatial situational awareness and aircraft control cannot be maintained

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5
Q

What is type one SD

A

Pilot fails to recognize the disorientation, may not think anything is wrong

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6
Q

What is a type two SD

A

Pilot perceives the problem but may not know what’s causing the issue. Is correctable.

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7
Q

How is type 2 SD correctable

A

3 way positive control transfer
Flight instruments
Cross check with crew

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8
Q

How is type three SD present

A

Pilot experiences sensation where he or she can not orient using visual cues or intranets

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9
Q

What’s the correction for type 3 SD

A

Control of the aircraft by copilot

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10
Q

How much percent of equilibrium is visual

A

80%

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11
Q

How much of equilibrium is vestibular

A

15%

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12
Q

How much of equalibrium is proprioceptive

A

5%

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13
Q

Orientation of vision requires what three things

A

Perception- detect object
Recognition- what object is
Identification- is it a threat?

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14
Q

Focal vision and degrees

A

Object recognition and identification
30-40

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15
Q

Ambient vision and degrees

A

Detects altitude, motion, cues and orients to environment
130/120 V
160/200 H

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16
Q

With nvg what’s the normal field of view

A

40

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17
Q

Focal and ambient vision work

A

Independently

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18
Q

What are functions if the vestibular system

A

Tracking, reflex info, orientation without vision

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19
Q

What is nystagmus

A

Inability to remain focused on an image
- Results from eyes inability to remain focused
- Most dangerous with nap of the earth flight

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20
Q

What do the semicircular canals do

A
  • Detects ya, pitch, and roll
  • Feels change in both speed and direction
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21
Q

What is the somatosensory system dependent on?

A

G forces

22
Q

What three systems are most important in equilibrium and balance

A

Visual, vestibular, and proprioceptive

23
Q

With the absence of vision what other system is worthless

A

Somatosensory

24
Q

*What self imposed stressor can have effects on vestibular system if residual effects are still there?

A

Alcohol

25
Q
A
26
Q

Vection/induced motion

A

Visually induced perception of self motion

27
Q

What are some examples of when induced motion can happen in an aircraft

A

Tall grass, and water hovering

28
Q

Confusion with ground lights occurs when

A

Pilot confuses ground lights with stars or vice versa

29
Q

Crater illusion

A

Where the search light makes it seem like you are landing in a crater when you are not could lead to an earlier then expected landing

30
Q

Height/Depth illusion

A

Due to loss of vision of the ground perceived altitude is wrong leading to accidental drifting, hard landings

31
Q

Autokinesis

A

Occurs when static light appears to ove when looked at for several seconds

32
Q

False horizon

A

Occurs when pilot confuses clouds, mountain ridges or other things as the horizon

33
Q

Fascination

A

Failure to pay attention outside of the aircraft due to something inside the aircraft

34
Q

Fixation

A

Crew members ignore orientation cues and focus on an object or goal

35
Q

Structural illusion

A

Where straight lines look curves due to snow, rain, heat, or other visual disturbents. Window shit

36
Q

Distance illusion/size consistency

A

Crew member misinterprets an object of size and shape by comparing it with what they are already accustomed or used to seeing based on experience. Three parts of it include size, shape, and aerial perceptive

37
Q

What visual illusion can be caused by tall wavy grass, that makes the pilot continuously put inputs into the flight controls?

A

Induced motion

38
Q

Downsloping runway created the illusion that

A

The aircraft is lower then it really is leading to a higher approach

39
Q

Upsloaping runway may create the illusion that

A

The aircraft is higher then it actually is leading to a lower approach then Normal

40
Q

What visual illusion can be caused by tall wavy grass

A

Induced motion

41
Q

Somatogyal vestibular illusion caused by?

A

Stimulated by angular acceleration

42
Q

Somatogravic vestibular illusion caused by?

A

Otolith organs are stimulated by linear or vertical movement, can be accelerations or decelerations

43
Q

What is the most common form of SD

A

The leans

44
Q

What happens on the leans

A

Pilots corrects altitude and compensated for a false sensation of turning in the opposite direction

45
Q

How does the grave yard spin happen

A

The semicircular canals reach equilibrium during a long turn marketing the illusion that motion is no longer happening. Pilot goes through deceleration which is perceived incorrectly as spinning the other way and falsely correct the spin leading to spinning more. Pilot may note the loss of altitude and pull up trying to gain altitude but that just tightens the spin and leads to loss of control.

46
Q

What is considered the most deadly somattogyral illusion

A

Coriolis Illusion

47
Q

Somatogyral Illusions

A
  • The Leans
  • Graveyard Spin
  • Coriolis
48
Q

Somatogravic illusions are caused by

A

Changes in gravity or linear acceleration and deceleration that stimulates the otolith

49
Q

What are the three types of somatogravic illusions

A

Oculogravic, elevator, and oculoagravic

50
Q

G-Excess

A

Change in magnitude not change in direction

Rucker Test 1 (11 decks)

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