Multiple Sclerosis (MS) is a lifelong disease that affects the brain and spinal cord. Currently there is no cure for MS.

To help doctors determine how severely MS impacts their patients, we use tests to measure walking, vision, hand use and thinking ability. However, we know that the normal age-related changes that we all can experience as we get older also can make those abilities more difficult for anyone.

This study looks at how the normal age-related changes affect people with and without MS, and will help us in the diagnosis and treatment of MS.

Our team wants to better understand the impact of fatigue and inattention on commercial drivers' safety. Our goal is to help truck drivers drive longer and safer. We won't be sharing the results and we will help our participants with useful information that will assist them in any concerns we may find.