The National Multiple Sclerosis Society estimates that more than half of all people with multiple sclerosis (MS) will suffer some form of cognitive symptoms. MS damages both myelin and the nerve cells within the brain, thereby compromising a variety of the brain's functions, including memory, spatial relationships, abstract reasoning and problem-solving, and attention and concentration. Although these symptoms manifest themselves in different forms, they are always frightening, and can be devastating in daily life. Despite the prevalence of these disabling symptoms among people living with multiple sclerosis, there is a dearth of literature on this important topic. Multiple Sclerosis: Understanding the Cognitive Challenges is the first comprehensive discussion of MS-related cognitive dysfunction, including the changes that can occur, their assessment and treatment, and strategies for dealing with their impact in daily life.