Desktop virtual reality visual stimulation system for animal experiments

Abstract

The invention discloses a desktop VR visual stimulation system for animal experiments. The desktop VR visual stimulation system comprises a display stand, a visual stimulation screen system and an image processing device. The display stand comprises a flat plate. A side of the flat plate is provided with a notch. The visual stimulation screen system comprises three displays mounted on the other three sides respectively, other than the side with the notch, of the flat plate. The image processing device is simultaneously connected with the three displays of the visual stimulation screen system to synchronously transmit images in three directions to the corresponding displays to form a 3D visual effect. The desktop VR visual stimulation system for animal experiments can realize 3D immersion covering all fields of view, can achieve visual stimulation matching animals having different body types, achieves an excellent visual stimulation effect, and is simple in structure, low in price, andsuitable for promotion.

Description

technical field [0001] The invention belongs to the field of scientific research equipment, and is used for behavioral research related to vision of non-human primates / rodents, neurobiological research, and in-body brain activity recording / imaging research, and specifically relates to a device for animal experiments. Desktop virtual reality visual stimulation system. Background technique [0002] Vision is the most important sensory ability of humans and animals. Most of the external information obtained by the brain is provided by vision. Vision is the most widely studied field in neuroscience. Current vision research still mainly uses rodents. At the same time, the visual stimulation methods used in the research are also mainly planar (2D) visual information. It should be emphasized that the rodents used in the laboratory live in cages for a long time, and the environment they come into contact with is basically limited to the horizontal plane, and the range of activitie...

AI Technical Summary

Problems solved by technology

On the one hand, a virtual reality (3D) visual stimulation system constructed with a ball screen was used to study the spatial navigation ability of mice (Dombeck et.al, 2010); they placed the mice on a spherical track suspended by air pressure, and the mice The running action can be performed with the head fixed, and the moving speed of the picture played by the ball screen is directly related to the running speed of the mouse; at present, this device has been commercialized, but it is expensive, and the most common device for rodents The price of the hardware is more than 200,000 RMB, and the size of the dome visual stimulation system is completely fixed after purchase. Usually, the size of the dome is proportional to the price. The radius of the dome used for rodents is not enough to accommodate more than Rodents are 20 times more than non-human primates, and the price of custom-made large-scale dome screens is almost unaffordable. At the same time, to achieve high scanning frequency display effects and color display effects, the hardware price will also double. The visual stimulation of the dome screen needs to be specially ordered, and an additional fee is required

At the same time, the device designed for rodents is not suitable for visual research on non-human primates. First, in terms of refresh rate, non-human primates have stronger visual ability than humans: usually 60Hz refresh rate Enough for human use, and even a lower refresh rate can be used for visual stimulation of rodents, but for non-human primates, it may cause frame skipping effects, so the ball used for non-human primates In terms of visual ability, non-human primates have complete color vision and 3D visual ability, which are far superior to rodents, but they are larger in size and have diverse behaviors, so it is not easy to fix them. Inside the dome, and the long-term fixation will cause the animal to be emotionally disturbed, which will easily cause damage to the dome

[0004] Therefore, the existing 3D (virtual reality) visual stimulation system is expensive, and it is not easy to be extended to larger non-human primate experiments. It is necessary to design a cheap, simple and applicable 3D visual stimulation system

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