Visual evoked potential test system and test method

Abstract

The invention relates to a visual evoked potential test system and test method. The visual evoked potential test system comprises a binding module and a test module, the binding module comprises a plurality of fixing plates and a plurality of fixing columns, the fixing plates define a test space for a test sample to enter, and the fixing columns are installed in the test space to bind the test sample; the test module comprises a visual induction part and an upper computer, the visual induction part is used for providing visual stimulation for the test sample, and the upper computer is used for receiving and processing test data. By means of the assembling modular design of the fixing plate and the fixing column, stable noninvasive constraint on a test sample is achieved, damage to animals and interference to electroencephalogram signals caused by a traditional constraint mode such as skull nails or anesthesia are avoided, the sight stability of the animals in the testing process is effectively guaranteed, and the testing accuracy is improved. Therefore, the quality and the accuracy of the visual evoked potential test signal are improved, and the test result is more reliable.

Description

Technical Field

[0001] This application relates to the technical field of medical devices, and particularly to a visual evoked potential test system and a test method. Background Art

[0002] In scientific experiments, it is of great significance to conduct electroencephalogram (EEG) and evoked potential tests on large animals similar to those on humans. The results can help to deeply understand the physiological mechanisms of the animal nervous system and provide key data support for research in multiple fields such as medicine and biology.

[0003] However, there are many difficulties in current practical operations. On the one hand, common anesthesia protocols will seriously affect the brain state of animals, resulting in low-quality EEG and evoked potential signals being collected. A large number of interference factors are mixed in the signals, leading to low data credibility and being unable to truly reflect the normal activities of the animal nervous system. On the other hand, there are many defects in existing animal experiment restraint devices. There are few special restraint devices for large animals in EEG tests. Especially for visual evoked potential tests, due to the need to accurately fix the animal's viewing angle, the restraint is extremely difficult. Some existing restraint devices use methods such as skull nails or anesthesia. Skull nails will cause trauma to animals and also interfere with the normal collection of EEG signals; while anesthesia methods, as mentioned above, will affect the quality of EEG signals. In addition, many restraint devices will cause harm to animals during use, such as strangulation and abrasion. Summary of the Invention

[0004] Based on this, a visual evoked potential test system and a test method are provided to solve the problems of difficult restraint, large signal interference, and harm to animals during testing.

[0005] An embodiment of the first aspect of this application provides a visual evoked potential test system, including:

[0006] A restraint module, the restraint module includes a plurality of fixing plates and a plurality of fixing columns. The plurality of fixing plates enclose a test space for a test sample to enter, and the fixing columns are installed in the test space to restrain the test sample;

[0007] A test module, the test module includes a visual stimulation component and a host computer. The visual stimulation component is used to provide visual stimuli to the test sample, and the host computer is used to receive and process test data.

[0008] In one of the embodiments, the fixing plate includes:

[0009] An upper fixing plate, on which a head opening is provided. The test space is connected to the external space through the head opening, and the neck of the test sample is clamped into the head opening so that its head is placed outside the test space;

[0010] A lower fixing plate, which is arranged below the upper fixing plate;

[0011] Two side fixing plates, the top of the side fixing plates is connected to the upper fixing plate, and the bottom is connected to the lower fixing plate.

[0012] In one embodiment, the head through-hole is located at one end of the upper fixing plate and penetrates through the end face of the upper fixing plate.

[0013] In one embodiment, the fixing column includes a support and fixation group for supporting the test sample, and the support and fixation group includes:

[0014] A neck support column, which is horizontally arranged, and both ends thereof are respectively connected to the side fixing plates, and is used for supporting the neck of the test sample;

[0015] A back support column, which is horizontally arranged, and both ends thereof are respectively connected to the side fixing plates, and is used for supporting the back of the test sample;

[0016] A hip support column, which is horizontally arranged, and both ends thereof are respectively connected to the side fixing plates, and is used for supporting the hip of the test sample;

[0017] A leg support column, which is horizontally arranged, and both ends thereof are respectively connected to the side fixing plates, and is used for supporting the legs of the test sample.

[0018] In one embodiment, the fixing column includes a limiting and fixing group for limiting the test sample, and the limiting and fixing group includes:

[0019] An upper limb limiting column, which is vertically arranged, and both ends thereof are respectively connected to the upper fixing plate and the lower fixing plate, and is used for limiting the upper limbs of the test sample;

[0020] A lower limb limiting column, which is vertically arranged, and both ends thereof are respectively connected to the upper fixing plate and the lower fixing plate, and is used for limiting the lower limbs of the test sample.

[0021] In one embodiment, the connection between the fixing plates is a snap connection or a threaded connection;

[0022] The connection between the fixing plate and the fixing column is a snap connection or a threaded connection.

[0023] In one embodiment, a plurality of fixing holes are provided on the fixing plate, and a fixing end capable of being snapped into the fixing holes is provided at the end of the fixing column.

[0024] In one embodiment, the visual induction member includes:

[0025] Stimulate the screen, which is placed in front of the test sample for the test sample to be stimulated;

[0026] An electrode, which is used to be installed at the corresponding position of the head of the test sample, and the electrode is communicatively connected to the host computer.

[0027] An embodiment of the second aspect of the present application provides a visual evoked potential test method, including the following steps:

[0028] According to the body type of the test sample, select a suitable visual evoked potential test system as in any one of the above embodiments, and enclose the fixing plate to form a test space for the test sample to enter;

[0029] Put the test sample into the test space, clamp its neck into the head access opening, and place the head outside the test space;

[0030] Install the fixing column to restrain the test sample;

[0031] Use the visual stimulation component to apply visual stimulation to the test sample, and the host computer receives and processes the test data.

[0032] In one embodiment, the visual evoked potential test method further includes the following steps:

[0033] After the test is completed, remove the fixing column to disperse the restraint module, and release the tested animal from the restraint module.

[0034] According to the visual evoked potential test system and test method of the embodiments of the present application, the test sample can be a large mammal. The test sample is restrained by the restraint module, visual stimulation is provided to the test sample through the visual stimulation component, and then the host computer receives and processes the test data. By using the assembled modular design of the fixing plate and the fixing column, stable and non-invasive restraint of the test sample is achieved, avoiding the harm caused to animals and the interference with electroencephalogram signals by traditional restraint methods such as skull nails or anesthesia, effectively ensuring the stable line of sight of the animal during the test, thereby improving the quality and accuracy of the visual evoked potential test signal and making the test result more reliable. Description of the Drawings

[0035] Figure 1 It is a schematic structural diagram of a visual evoked potential test system according to an embodiment of the present application.

[0036] Figure 2 It is a schematic structural diagram of a visual evoked potential test system according to an embodiment of the present application, showing the upper fixing plate and the lower fixing plate.

[0037] Figure 3Schematic diagram showing the structure of the side fixing plate of the visual evoked potential testing system according to an embodiment of the present application.

[0038] Figure 4 Flowchart of the visual evoked potential testing method according to an embodiment of the present application.

[0039] Reference numerals:

[0040] 1000, restraint module; 1100, fixing plate; 1101, fixing hole; 1110, upper fixing plate; 1111, head through-hole; 1120, lower fixing plate; 1130, side fixing plate; 1200, fixing column; 1201, fixed end; 1210, neck support column; 1220, back support column; 1230, hip support column; 1240, leg support column; 1250, upper limb limiting column; 1260, lower limb limiting column;

[0041] 2000, testing module; 2100, visual induction element; 2110, stimulation screen; 2120, electrode; 2200, host computer;

[0042] 3000, test sample; 3100, head. Detailed implementation manners

[0043] To make the above objects, features, and advantages of the present application more obvious and understandable, the following will describe the detailed implementation manners of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0044] In the description of the present application, it should be understood that if terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0045] In addition, if the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of this application, if the term "a plurality of" appears, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0046] In this application, unless otherwise clearly specified and defined, if terms such as "installed", "connected", "linked", "fixed", etc. appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0047] In this application, unless otherwise clearly specified and defined, if there is a description such as a first feature being "on" or "under" a second feature, its meaning can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature is at a higher horizontal level than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature is at a lower horizontal level than the second feature.

[0048] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If so, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in this application are only for illustrative purposes and do not represent the only implementation.

[0049] Refer to Figure 1 and Figure 2, at least one embodiment of the present application provides a visual evoked potential test system. The visual evoked potential test system includes a restraint module 1000 and a test module 2000. The restraint module 1000 includes a plurality of fixing plates 1100 and a plurality of fixing columns 1200. The plurality of fixing plates 1100 enclose a test space for the test sample 3000 to enter. The fixing columns 1200 are installed in the test space to restrain the test sample 3000. The test module 2000 includes a visual evoker 2100 and a host computer 2200. The visual evoker 2100 is used to provide visual stimuli to the test sample 3000, and the host computer 2200 is used to receive and process test data.

[0050] For the visual evoked potential test system according to the embodiment of the present application, the test sample 3000 can be a large mammal. The test sample 3000 is restrained by the restraint module 1000. Visual stimuli are provided to the test sample 3000 by the visual evoker 2100, and then the host computer 2200 receives and processes the test data. By using the assembled modular design of the fixing plates 1100 and the fixing columns 1200, stable and non-invasive restraint of the test sample 3000 is achieved, avoiding the harm to animals and the interference with electroencephalogram signals caused by traditional restraint methods such as skull nails or anesthesia, effectively ensuring the stable line of sight of animals during the test, thereby improving the quality and accuracy of the visual evoked potential test signal and making the test results more reliable.

[0051] Refer to Figure 2 and Figure 3 , in some embodiments, the fixing plate 1100 includes an upper fixing plate 1110, a lower fixing plate 1120, and two side fixing plates 1130. A head opening 1111 is provided on the upper fixing plate 1110. The test space is connected to the external space through the head opening 1111. The neck of the test sample 3000 is clamped into the head opening 1111, so that its head 3100 is placed outside the test space. The lower fixing plate 1120 is arranged below the upper fixing plate 1110. The top of the side fixing plate 1130 is connected to the upper fixing plate 1110, and the bottom is connected to the lower fixing plate 1120.

[0052] Specifically, in some embodiments, the fixing plate 1100 adopts a rectangular thin plate design. The material of the fixing plate 1100 is selected from rigid materials such as stainless steel and acrylic, which has sufficient strength and stability to withstand the struggle and movement of animals during the test. The lower fixing plate 1120 and the side fixing plates 1130 cooperate with the upper fixing plate 1110 to jointly achieve the all-round fixation of animals. The lower fixing plate 1120 is mainly used to support the animal's body, and the side fixing plates 1130 restrict the activity range of animals from the side to ensure that animals maintain a stable posture during the test.

[0053] In some embodiments, the head opening 1111 is located at one end of the upper fixing plate 1110 and penetrates through the end face of the upper fixing plate 1110. The head opening 1111 is reserved on the upper fixing plate 1110. One side of the head opening 1111 extends to the end of the upper fixing plate 1110, and the other side is designed as an arc structure, making it smoother when contacting the neck of the test sample 3000 and reducing the friction on the skin of the test sample 3000.

[0054] Refer to Figure 1 , in some embodiments, the fixing column 1200 includes a support and fixation group for supporting the test sample 3000. The support and fixation group includes a neck support column 1210, a back support column 1220, a hip support column 1230, and a leg support column 1240. Among them, the neck support column 1210 is horizontally arranged, and its two ends are respectively connected to the side fixing plates 1130 for supporting the neck of the test sample 3000; the back support column 1220 is horizontally arranged, and its two ends are respectively connected to the side fixing plates 1130 for supporting the back of the test sample 3000; the hip support column 1230 is horizontally arranged, and its two ends are respectively connected to the side fixing plates 1130 for supporting the hips of the test sample 3000; the leg support column 1240 is horizontally arranged, and its two ends are respectively connected to the side fixing plates 1130 for supporting the legs of the test sample 3000.

[0055] Refer to Figure 1 , in some embodiments, the fixing column 1200 includes a limiting and fixing group for limiting the test sample 3000. The limiting and fixing group includes an upper limb limiting column 1250 and a lower limb limiting column 1260. The upper limb limiting column 1250 is vertically arranged, and its two ends are respectively connected to the upper fixing plate 1110 and the lower fixing plate 1120 for limiting the upper limbs of the test sample 3000; the lower limb limiting column 1260 is vertically arranged, and its two ends are respectively connected to the upper fixing plate 1110 and the lower fixing plate 1120 for limiting the lower limbs of the test sample 3000.

[0056] Through the above settings, the design of the fixing column 1200 and the fixing plate 1100 can non-invasively and stably fix the animal's line of sight. The specific method is to reasonably set the neck support column 1210 and the head opening 1111 on the upper fixing plate 1110 to clamp the animal's neck. Without harming the animal, it can effectively limit the rotation of the animal's head 3100, ensure the stability of the animal's line of sight during the test, and facilitate the accurate acquisition of visual evoked potential signals.

[0057] Supported by the back support column 1220, hip support column 1230, and leg support column 1240, and limited by the upper limb limit column 1250 and lower limb limit column 1260, the random movement of the animal is restricted, the line-of-sight stability of the test sample 3000 is improved, signal interference is reduced, and the accuracy and reliability of the visual evoked potential test are enhanced.

[0058] In some embodiments, the connection between the fixing plates 1100 is a snap connection or a threaded connection. The connection between the fixing plate 1100 and the fixing column 1200 is a snap connection or a threaded connection. When the upper fixing plate 1110, lower fixing plate 1120, and two side fixing plates 1130 are connected to each other, a connection scheme with a connection point every 25 cm can be adopted. Matching threads are processed on the fixing plate 1100 and the fixing column 1200 respectively, and they are connected according to the requirement of one connection point every 25 cm to ensure firm connection. If a snap connection is used, matching snap components are installed on the fixing plate 1100 and the fixing column 1200, and the snaps are aligned and snapped tightly to complete the connection, ensuring the stability and reliability of the connection structure. It is not only convenient for quick assembly and disassembly but also can ensure the stability of the connection structure, so that the entire restraint device will not loosen easily during the test. By changing the fixing column 1200, the system can easily adapt to the restraint requirements of test samples 3000 with different body sizes and different species, greatly enhancing the expandability of the device, meeting the diverse experimental research needs, reducing the research cost, and improving the research efficiency.

[0059] In some embodiments, the fixing column 1200 is changed to adapt to the restraint requirements of test samples 3000 with different body sizes and different species. For example, for larger animals, longer and thicker fixing columns 1200 can be selected; for smaller animals, shorter and thinner fixing columns 1200 are used. The restraint module 1000 is a temporarily assembled structure during use, which is convenient for carrying and storage. Before each test, the appropriate fixing plate 1100 and fixing column 1200 can be selected according to the animal's body size for assembly. During assembly, first find the key parts of the animal's movement, such as the knee joint, etc., and design the fixing column 1200 to sequentially hold these key parts. After restricting the animal's behavior, the assembly can be completed and the test can be prepared. After the test, the operation is simple and convenient. Just remove the fixing column 1200. If it is a threaded connection, unscrew it; if it is a snap connection, open it. The structure of the entire restraint module 1000 will naturally disperse, facilitating subsequent processing of the animal.

[0060] Refer to Figure 1 and Figure 2 In some embodiments, a number of fixing holes 1101 are provided on the fixing plate 1100, and a fixing end 1201 capable of being inserted into the fixing hole 1101 is provided at the end of the fixing column 1200.

[0061] Refer to FigureFigure 1 In some embodiments, the visual induction component 2100 includes a stimulation screen 2110 and electrodes 2120. The stimulation screen 2110 is placed in front of the test sample 3000 for the test sample 3000 to be stimulated. The electrodes 2120 are used to be installed at corresponding positions on the head 3100 of the test sample 3000, and the electrodes 2120 are communicatively connected to the host computer 2200. The stimulation screen 2110 is used to provide visual stimuli to the animal, and it can set different stimulus parameters such as images, colors, and flicker frequencies according to test requirements to stimulate the visual nerve response of the animal. The host computer 2200 is responsible for receiving and processing test data. It can perform a series of processes such as amplifying, filtering, and analyzing the collected visual evoked potential signals, and finally generate a test report for researchers to refer to.

[0062] When the visual evoked potential test system provided by the embodiments of the present application is in use, first, each component of the restraint module 1000 and the test module 2000 is prepared. The fixing plate 1100 and the fixing column 1200 of the restraint module 1000 are selected according to the body type and species of the animal to ensure stable restraint. The stimulation screen 2110 and the host computer 2200 of the test module 2000 are debugged to ensure that the stimulation screen 2110 can normally display various visual stimulation images and the host computer 2200 can accurately receive and process test data. The restraint module 1000 is assembled, the animal is placed in a suitable position, and the animal is fixed with the restraint module 1000 so that the head 3100 of the animal is aligned with the stimulation screen 2110, and the test module 2000 is started to begin the visual evoked potential test.

[0063] Referring to Figure 4 At least one embodiment of the present application proposes a visual evoked potential test method, and the visual evoked potential test method includes the following steps:

[0064] Step S100: According to the body type of the test sample 3000, select a suitable visual evoked potential test system as described in any of the above embodiments, and enclose the fixing plate 1100 to form a test space for the test sample 3000 to enter;

[0065] Step S200: Put the test sample 3000 into the test space, insert its neck into the head access opening 1111, and place the head 3100 outside the test space;

[0066] Step S300: Install the fixing column 1200 to restrain the test sample 3000;

[0067] Step S400: Use the visual induction component 2100 to apply visual stimuli to the test sample 3000, and the host computer 2200 receives and processes the test data.

[0068] Specifically, in step S100, before the test, according to the body size and species characteristics of the animal, a fixing post 1200 of a suitable specification is selected. For example, for larger animals, a fixing post 1200 with a longer length and a thicker diameter is selected; for smaller animals, a shorter and thinner fixing post 1200 is selected. By replacing fixing posts 1200 of different specifications, effective restraint and adaptation for different animals are achieved. When assembling the restraint module 1000, first place the lower fixing plate 1120 in a suitable position to support the animal's body. Then install the side fixing plate 1130, and connect the side fixing plate 1130 to the lower fixing plate 1120 through the fixing post 1200 to restrict the lateral movement of the animal. Finally, install the upper fixing plate 1110, and connect it to the lower fixing plate 1120 and the side fixing plate 1130 using the fixing post 1200 to form a complete surrounding structure to achieve all-round fixation of the animal.

[0069] In step S300, when installing the fixing post 1200, adjust the fixing post 1200 to a suitable position so that it catches key parts such as the animal's neck, but pay attention to the moderate force to avoid hurting the animal and ensure the stable vision of the animal.

[0070] In step S400, when setting up the test module 2000, install the stimulation screen 2110 at a suitable distance in front of the animal, and adjust the height and angle of the screen according to the test requirements to ensure that the animal can clearly see the visual stimulation image on the screen. Connect the upper computer 2200 to the acquisition electrode 2120, and the acquisition electrode 2120 is installed at a suitable position on the animal's head 3100 for collecting visual evoked potential signals. Start the upper computer 2200 and the stimulation screen 2110, set the stimulation parameters such as image type, flicker frequency, etc., and start the test. The upper computer 2200 receives and processes the collected signals in real time.

[0071] In some embodiments, the visual evoked potential test method further includes the following steps:

[0072] Step S500, after the test is completed, remove the fixing post 1200 to disperse the restraint module 1000, and release the tested animal from the restraint module 1000.

[0073] Specifically, in step S500, for the fixing post 1200 connected by threads, use a suitable tool such as a wrench to unscrew the threads; for the fixing post 1200 connected by a buckle, directly open the buckle. After removing the fixing post 1200, the structure of the entire restraint module 1000 is dispersed, and the animal can be safely released, and subsequent observation and treatment of the animal can be carried out.

[0074] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification.

[0075] The above-described embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A visual evoked potential testing system, characterized in that: include: A restraint module, the restraint module comprising a plurality of fixing plates and a plurality of fixing columns, the plurality of fixing plates enclosing a test space for a test sample to enter, the fixing columns being installed in the test space to restrain the test sample; The test module includes a visual induction component and a host computer. The visual induction component is used to provide visual stimulation to the test sample, and the host computer is used to receive and process test data.

2. The visual evoked potential testing system according to claim 1, characterized in that: The fixing plate comprises: An upper fixing plate, wherein a head opening is provided on the upper fixing plate, the test space is connected to the external space through the head opening, and the neck of the test sample is inserted into the head opening so that the head is placed outside the test space; A lower fixing plate, the lower fixing plate being arranged below the upper fixing plate; Two side fixing plates, the top of each side fixing plate is connected to the upper fixing plate, and the bottom of each side fixing plate is connected to the lower fixing plate.

3. The visual evoked potential testing system according to claim 2, characterized in that: The head opening is located at one end portion of the upper fixing plate and penetrates the end surface of the upper fixing plate.

4. The visual evoked potential testing system according to claim 2, characterized in that: The fixing column includes a support fixing group for supporting the test sample, and the support fixing group includes: A neck support column, the neck support column is horizontally arranged, and both ends of the neck support column are respectively connected to the side fixing plates, and is used to support the neck of the test sample; A back support column, which is horizontally arranged and has two ends respectively connected to the side fixing plates, and is used to support the back of the test sample; A buttocks support column, which is horizontally arranged and has two ends respectively connected to the side fixing plates, and is used to support the buttocks of the test sample; The leg support column is horizontally arranged, and its two ends are respectively connected to the side fixing plates, and is used to support the legs of the test sample.

5. The visual evoked potential testing system according to claim 2, characterized in that: The fixing column includes a position limiting and fixing group for limiting the position of the test sample, and the position limiting and fixing group includes: An upper limb limiting column, which is vertically arranged and has two ends respectively connected to the upper fixing plate and the lower fixing plate, and is used to limit the upper limb of the test sample; The lower limb limiting column is vertically arranged, and its two ends are respectively connected to the upper fixing plate and the lower fixing plate, and is used for limiting the lower limbs of the test sample.

6. The visual evoked potential testing system according to claim 1, characterized in that: The fixing plates are connected by snap-fit ​​or threaded connection; The fixing plate and the fixing column are connected by snap-fit ​​or threaded connection.

7. The visual evoked potential testing system according to claim 4, characterized in that: The fixing plate is provided with a plurality of fixing holes, and the end of the fixing column is provided with a fixing end which can be inserted into the fixing hole.

8. The visual evoked potential testing system according to claim 1, characterized in that: The visual cues include: A stimulation screen, which is placed in front of the test sample so as to stimulate the test sample; The electrode is used to be installed at a corresponding position of the head of the test sample, and the electrode is communicatively connected with the host computer.

9. A visual evoked potential testing method, characterized in that: The steps include: According to the size of the test sample, a suitable visual evoked potential test system as claimed in any one of claims 1 to 8 is selected, and the fixed plate is enclosed to form a test space for the test sample to enter; Place the test sample into the test space, insert its neck into the head opening, and place the head outside the test space; Install fixed columns to restrain the test specimens; Visual stimuli are applied to the test samples using visual elicitation devices, and the host computer receives and processes the test data.

10. The visual evoked potential testing method according to claim 9, characterized in that: The visual evoked potential testing method also includes the following steps: After the test is completed, the fixing posts are removed to allow the restraint module to be dispersed, and the tested animal is released from the restraint module.

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