4. Participants will perform the MS Functional Composite (MSFC) which consists of a 25 foot walk test (25FWT), the 9 hole peg test (9HPT), and the Paced Auditory Serial Addition Test (PASAT). For the 25FWT participants will be asked to walk 25 feet as quickly, but as safely as possible. This will be performed in an isolated hallway with the length clearly marked. Participants will begin after a short count down and the time it takes to walk 25 feet will be measured with a handheld stop watch. Two trials of the 25FWT will be performed and INPL staff will walk alongside the participants to minimize the risk of falling. Next, the 9HPT will be performed. Participants will begin with their dominant hand and quickly move 9 cylindrical plastic pegs from a concave dish into 9 holes. Pegs will be placed in the holes 1 at a time and once all pegs are in a hole the participants will remove the pegs and return them to the dish. Each hand will be tested twice and the time of completion will be recorded with a handheld stop watch. The PASAT will be performed after the 9HPT to test cognitive function. This test consists of the playback of a series of pre-recorded numbers spoken on a computer. The participants are asked to add the last two spoken numbers which occur every three seconds for a 3 minute period of time. The number of correct answers is recorded by the test moderator.