Amyotrophic lateral sclerosis (ALS) refers to motor neuron disease, with patients initially showing mainly reduced hand strength and clumsy fine motor activities, such as difficulty and lack of agility when using a screwdriver. There may also be atrophy of small muscles, such as the interosseous muscles of the hand and the hypothenar muscles, which are commonly seen in clinical settings. Some patients may initially exhibit symptoms like unclear speech, articulation disorders, and coughing or choking while drinking, which are important to recognize. As the disease progresses, the patient's generalized weakness becomes more apparent, with noticeable fasciculations and significant muscle atrophy developing clinically.