What are the symptoms of ALS in the hands? Which fingers are affected by ALS?

ALS (Amyotrophic Lateral Sclerosis) can manifest with a variety of symptoms that affect the hands and fingers. These symptoms can vary from person to person.

ALS often starts in the hands, feet, arms, or legs before it spreads to other parts of the body. The most common early symptoms of ALS include muscle twitching and weakness in an arm or leg, trouble swallowing, or slurred speech.

ALS can affect any part of the body, but it often starts in the hands, feet, arms, or legs. One of the early physical symptoms of ALS is the split-hand sign.

The split-hand sign, one of the early physical symptoms of ALS, refers to a loss of the pincer grasp due to weakness and wasting of two hand muscles — the abductor pollicis brevis (APB) and the first dorsal interosseous (FDI) muscles — located on the side of the thumb.

Research suggests a complex interplay of genetic and environmental factors involved in the occurrence of ALS. The risk of developing ALS increases with age and is higher for men than women.