Individuals with MS in the first group will play balance games with virtual reality glasses for 15 minutes. Three different progressive games will be determined according to the functional level of the individual. Each game offers different gradually increasing difficulty levels and time options.

Individuals with MS in the second group will be given balance exercises with stroboscopic glasses for 15 minutes. Exercises will be selected in accordance with the functional level of the individual and will progress according to the individual's condition. In each session, 3-5 different exercises will be performed, taking into account the functional status of the individual.

Individuals with MS in the third group will be given balance exercises simultaneously with metaphor training using various visuals for 15 minutes. The images will be projected on the screen in front of the individuals and the individuals will be given the command: "Imagine the movement you are doing as in the image." Meanwhile, reinforcers deemed necessary will be used by the researcher physiotherapist to increase the patient's participation and motivation. Static balance exercises in the program will be performed first on stable surfaces and then on unstable surfaces. In each session, 3-5 different exercises will be performed, taking into account the functional status of the individual. The difficulty levels of the exercises will progress by adjusting according to the functional status of the individual.

Balance exercises with Virtual Reality Glasses

Functional near-infrared spectroscopy is a device used to evaluate brain functions in the cerebral cortex. This device is an optical brain imaging method that measures the blood oxygenation level-dependent (BOLD) response of brain tissues. With this method, relative changes in regional brain oxygenation in the part thought to be associated with brain activation can be determined. In our study, Artinis Brite Lite® fNIRS systems will be used. The system consists of a wearable soft head and has 10 channels. In the evaluation procedure, a trial session will be conducted before the actual measurement, during which the subjects will be fitted with an fNIRS headset. The balance tasks to be evaluated will consist of right and left weight transfer, standing with two feet together, standing on one leg, tandem walking, turning from right to left/left to right, jumping in place and jumping over obstacles (Sathe et al., 2023).

It is an assessment tool with strong evidence for its validity as a measure of functional mobility in individuals with MS ( Sebastiao et al., 2016 ).

It is an easily applicable dynamic balance measurement technique that has features similar to functional movements. Distances below 15 cm have been found to be associated with an increased risk of falling (Weiner et al., 1992).

Berg Balance Scale is a scale that is widely used to evaluate balance disorders in multiple sclerosis patients (Berg et al., 1989), provides information about the patient's balance function, and is used to evaluate post-rehabilitation improvements (Gervasoni et al., 2016). The scale consists of 14 items for monitoring performance. Each item is scored between 0 and 4; A high score indicates good balance.

This test was developed by Desrosiers et al. to evaluate the lower extremity motor coordination skills of patients with a history of stroke, low back pain and surgery. Developed by. The test begins with the individual sitting on a chair with the knees and ankles at a 90-degree angle. Two red targets with a diameter of 6 cm are placed in front of it, distally and proximally, on a 55x50x0.4 cm mat, with 19 specific localization dimensions. The individual is asked to touch the target closest to the big toe as quickly and smoothly as possible. The number of movements made repetitively, smoothly and as fast as possible within 20 seconds is recorded (Desrosiers et al., 2005).