The very little finger, or pinky finger, helps in gripping objects tightly as it is near the palm. You have a condition inside the fingers, hands, and wrists that have not improved with very simple steps or initial procedure by your GP. Extensor pollicis brevis (EPB) originates on the ulnar https://www.theorthopaedicandpainpractice.com/what-are-the-different-bones-found-in-my-hand/