BIOLOGY | MEDICAL | HEALTH on Instagram: "This deep forearm muscle is the powerhouse behind finger grip. It runs from the ulna all the way to the tips of your fingers, letting you bend the last joint (DIP) of the index, middle, ring, and little fingers. Ever crushed a handshake, held a barbell, typed fast, or climbed a rope? Yep—FDP was doing the heavy lifting. What makes it cool is its precision + strength combo. It works quietly beneath the surface, coordinating with other flexors to give you