When thinking, people will subconsciously tap the table with their fingers. From the perspective of Chinese medicine, what role does this have?

Stimulate the nerve center of the brain and keep the meridians and qi and blood active. Exercising fingers can stimulate different nerve centers in the brain, and tapping fingers frequently can keep the meridians and qi and blood active, and make people think clearly, so as to stay away from Alzheimer's disease. Therefore, it can stimulate the nerve center of the brain and keep the meridians and qi and blood active.