The Ultimate Optomotor Drum

OptoDrum: The Ultimate Optomotor Drum

The animal sits on an elevated platform, surrounded by computer monitors. A camera observes the behavior of the animal from above while a visual stimulus, a virtual striped cylinder, is projected onto the screens. The stripe pattern slowly rotates around the animal, triggering the optomotor reflex. This means that the animal follows the stripe pattern with its gaze by moving its head. This head movement is automatically detected and analyzed by the OptoDrum software. In addition, the projected pattern is continuously and automatically adjusted so that the animal is always in the center of the cylinder. As a result, the spatial frequency of the stripe pattern stays constant in all directions.

striata technologies optodrum
striata technologies optodrum

In a staircase procedure, the stripe pattern is made more difficult to be seen, by reducing either the contrast or the width of the stripes, until the animal fails to follow the stimulus with its head movements. The assessment of whether or not the animal follows the rotating stimulus, is done automatically by the OptoDrum software. This removes any observer bias, and it makes the experimental outcome objective. Further, even untrained personnel can immediately use the OptoDrum.

striata technologies optodrum

Key Features of the OptoDrum

Fully automated experiments

  • Automated animal detection (rodents): Robust detection of gaze direction with freely moving animals in a non-static illuminated background.
  • Automated behavioral analysis (rodents): Objective assessment of the behavior without the need of user interference in real-time
  • Staircase testing protocol to find the threshold for each animal for contrast sensitivity and visual acuity measurements
  • Re-analysis of a previously recorded video possible
  • Manual assessment optional
  • Coming soon: Separate analysis for left and right eye

Virtual arena

  • Automated adjustment of stimulus pattern: Spatial frequency of the presented stripe pattern is kept constant for the moving animal.
  • Virtual arena with full HD panels with thin bezels
  • Minimum generation of heat
  • Scotopic + Photopic testing

Broad range of animals

  • Mice
  • Rats
  • Zebrafish Larvae (different optics)
  • Chicken
  • Triplefin Fish
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Display Panels
  • 23.8” full-HD IPS panels
  • 178° vertical and horizontal viewing angle
  • DICOM color mode for faithful stimulus presentation. Brightness: 250 cd/m²
  • Compact industrial camera
  • IR-sensitive 1/3” CMOS sensor with global shutter
  • Wide angle lens, F1.6
  • Inside: 54 x 54 x 30 cm
  • Outside: 70 x 70 x 75 cm
  • Weight: ca. 50 kg
  • Standalone software running on a state-of-the-art workstation
  • High-quality AMD video card for multimonitoring
  • Top and bottom mirror
  • Elevated plattform in 3 different sizes and 2 different colors, easy to change and clean
  • Front door: Easy mouse handling and easy cleaning