Alzheimer’s disease is a chronic neurodegenerative disorder that primarily affects the brain, leading to a progressive decline in memory, thinking skills, and cognitive abilities. It is the most common cause of dementia, a syndrome characterized by a decline in memory and other cognitive functions severe enough to interfere with daily life.
Parkinson’s disease is a neurodegenerative disorder that primarily affects the central nervous system. It is named after James Parkinson, the British physician who first described its symptoms in 1817. Parkinson’s disease is characterized by a progressive loss of dopamine-producing cells in a region of the brain called the substantia nigra.
Amyotrophic lateral sclerosis (ALS), also known as Lou Gehrig’s disease, is a progressive neurodegenerative disorder that affects the nerve cells responsible for controlling voluntary muscle movement. It is characterized by the gradual degeneration and death of motor neurons in the brain and spinal cord. ALS primarily affects the upper motor neurons in the brain and the lower motor neurons in the spinal cord.
