Some devastating neurological conditions include Lou Gehrig's disease and Lewy body dementia, according to University of California San Francisco Medical Center, the Lewy Body Dementia Association and WebMD. Creutzfeldt-Jakob disease is also a terrible neurological disorder.
Creutzfeldt-Jakob disease is a progressive and ultimately fatal brain disease caused by an infection of prions, says UCSF Medical Center. It usually strikes people in their 60s and kills 90 percent of sufferers within a year of diagnosis. Its symptoms mimic many other neurological disorders and include insomnia, clumsiness, visual problems, changes in personality and behavior and confusion. Near the end, the patient is blind, descends into dementia, spasms and finally a coma that leads to death.
Lou Gehrig's disease, known as amyotrophic lateral sclerosis, or ALS, is a disease that attacks the nerves that control muscles, says UCSF Medical Center. It's a progressive disease, and the patient feels his arms, legs, feet and ankles grow weaker over time. Eventually, ALS destroys the muscles that control speech, breathing and swallowing. Because of this, most people with ALS die because of respiratory failure. Yet, as their bodies fail, their intellect and senses are untouched.
Lewy body dementia is a fairly common type of dementia, says WebMD. Lewy bodies are knots of protein that build up in the brain and damage memory, thinking, behavior and mood. As of 2015, there is no cure for Lewy body dementia, and it is usually fatal within five to seven years, according to the Lewy Body Dementia Association.