Lack of coordination and unsteadiness on your feet.
Often caused by MS disease activity in the central nervous system (CNS), ataxia results in both lack of coordination and unsteadiness on your feet, leading to a wobbly stature and haphazard limb movements. Other symptoms include speech changes and abnormalities in eye movements.
References:
MS Trust. Ataxia. Available at: https://www.mstrust.org.uk/a-z/ataxia. Accessed March 2020