Patients and healthy individuals first filled out the demographic and clinical information form. Then, the Trunk Impairment Scale was evaluated. Participants performed 9DPT with their trunks free and again with their trunks restrained.

Participants were seated in a chair with a standard sitting height of 26 centimeters. After completing the 9-Hole Peg Test with their trunks free on a table of appropriate height so that their trunks would not flexion, they were secured to the chair crosswise in front of their chest with the help of a non-elastic but firm enough belt that would not cause discomfort to the person. Participants completed the 9-DPT with their trunks constrained.

EDSS was used to determine the patients' level of disability. EDSS is most commonly used to assess the level of disability in persons with MS. In this scale pyramidal, cerebral, cerebellar, brainstem, visual and sensory subparameters are evaluated it consists of ordinal rating system ranging from 0 (normal neurological status) to 10 (death due to MS) in 0.5 increments interval (when reaching EDSS 1). The lower scale values of the EDSS measureimpairments based on the neurological examination, while the upper range of the scale (> EDSS 6) measures handicaps of patients with MS. The determination of EDSS 4 - 6 is heavily dependent on aspects of walking ability.

This scale used to evaluate the trunk control of the participants, TIS contains static sitting balance, dynamic sitting balance, and coordination. The total score of this scale is from 0 to 23 and a high score indicates better trunk control.

The patients were placed in the standard sitting position for the test and the parameters were applied. Standart position is such that the knees are flexed at 90 degrees, without back support, with the hands and forearms on the thighs and the feet in contact with the ground.

It is a short, standardized, quantitative test used to evaluate upper extremity function. In the test, patients are asked to pick up nine wooden pegs from a platform as quickly as possible and then place them back into the holes.In our study, the test was conducted twice for both the dominant and non-dominant hands, and the average completion time was recorded.