Amyotrophic lateral sclerosis, also known as ALS or Lou Gehrig's disease, is a disease of the nervous system. It weakens the muscles and affects the nerve cells in the brain and spinal cord. Only about 20,000 people per year are diagnosed with this condition. As ALS progresses, motor neurons gradually deteriorate and then die. The brain loses the ability to initiate and control movement, often resulting in an inability to eat, speak, move, and even breathe. There are treatments for ALS, but there is no cure.
Loss of coordination is one of the first warning signs of ALS. Reduced hand-eye coordination may start slowly, with the individual noticing relatively minor issues such as the ability to grasp a hairbrush. Over time, the number of episodes increases in frequency. In some cases, coordination issues last for months before other symptoms begin to appear.
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