Overview
Amyotrophic lateral sclerosis (ALS), also known as Lou Gehrig's disease, is a progressive neurodegenerative disease that affects nerve cells in the brain and spinal cord. It leads to the degeneration of motor neurons, which are responsible for controlling voluntary muscle movement. As motor neurons degenerate and die, the brain loses the ability to initiate and control muscle movement, leading to progressive muscle weakness, paralysis, and eventually respiratory failure. ALS is a rare disease, but it is the most common form of motor neuron disease.
Symptoms
Muscle weakness, difficulty speaking, trouble breathing. Other common symptoms include muscle twitching and cramps, tripping and falling, hand weakness, slurred speech, difficulty swallowing, and emotional lability (involuntary laughing or crying). Symptoms usually begin in the limbs or in the bulbar region (affecting speech and swallowing) and gradually spread to other parts of the body. ALS does not typically affect the senses, cognition, or bladder control.
Causes
Unknown, genetic factors. The exact cause of ALS is not known, but it is believed to involve a combination of genetic and environmental factors. Approximately 10% of ALS cases are familial (inherited), while the remaining 90% are sporadic. Several genes have been linked to ALS, including C9orf72, SOD1, TARDBP, and FUS. Environmental factors such as smoking, military service, and exposure to certain toxins may also play a role.
Treatment
Supportive therapy and medications. While there is no cure for ALS, treatment focuses on managing symptoms, slowing progression, and improving quality of life. Medications such as riluzole and edaravone may help slow the disease. Physical, occupational, and speech therapy can help maintain mobility, function, and communication. Respiratory support, nutritional support, and assistive devices are also important components of care. A multidisciplinary approach involving healthcare professionals, caregivers, and support groups is essential.