Virtual Morris Water Maze

Virtual Morris Water Maze.

Virtual Reality Maze Testing
Subject’s-eye view of the pool in the Morris water maze. A yellow hexagonal distal cue is visible. The lab in this case has not been screened.

HVS 4D VR virtual environments include a highly realistic rodent’s eye view of the Morris water maze task. Human subjects wear an Oculus Rift headset, and navigate using a gamepad, Oculus Touch Controller or omnidirectional treadmill. The virtual reality headset allows the subject to look around the arena, with head turning providing vestibular input. Translation through the arena can be by hand, using a gamepad or keyboard, or by simulating walking on an omni-directional treadmill. The treadmill allows the subject to change direction as well as moving forward, providing proprioceptive input. The subject’s position and movement through the virtual environment is tracked by the HVS Image software, which gives path plots and scientific measures and analyses equivalent to those used in the equivalent animal paradigm.

HVS Image virtual Morris water maze for humans makes the following analyses available. You can choose as many or as few as you like to include in your results files.

  • Latency
  • Path length
  • Average speed

    Virtual Reality Water Maze
    This is the same laboratory with screens placed to simulate the typical method of removing extraneous cues. A dark conical cue is visible in this view.
  • Percentage of time not moving, or moving below a certain speed
  • Active speed (average speed corrected for the above)
  • Percentage of time in each quadrant
  • Percentage of path in each quadrant
  • Percentage of time in each zone
  • Heading (angle relative to ideal path)
  • Range
  • Percentage of time in thigmotaxis
  • Percentage of path in thigmotaxis
  • Number of passes through counters
  • Percentage of time in counters
  • Latencies to counters
  • Close encounter time and path
  • Corridor Test (derived from Wishaw Corridor Test but handles any start point to any platform position and normalizes the result to allow for different corridor areas)
  • Cone Test
  • Path Ratio
  • Pool Circling
  • Kelly Test
  • Gallagher Measures (e.g. Gallagher Proximity Measure, Gallagher Cumulative Measure)
  • Quad Entries

    Virtual Reality Morris Water Maze
    In this version of the task all the extraneous laboratory visual cues have been screened out with a 4 meter cubic white box leaving a simplified environment with just the wall mounted cue set.
  • Path Efficiency Ratio (actual path length / direct path length)
  • Time-bins
  • Gallagher by Segment
  • Speed vs Time
  • Pool zones can be equi-spaced or equi-area.

 

Read about HVS Image 4D VR in American Laboratory Magazine