The clenched fist syndrome/psycho-flexed hand, first described in the early s, has not yet entered the major psychiatric textbooks.
J Hand Surg Am. Sep;5(5) The clenched fist syndrome. Simmons BP , Vasile RG. The clenched fist syndrome is an entity in which the patient keeps.
To make or clench a fist is to fold the fingers tightly into the center of the palm and then to clamp This is because while "most primate hands are long of palm and finger [and] short of thumb", the proportions are the opposite for humans.