January 12, 2020
Relax for a minute- Move your fingers
Everyone knows how to swear with the index finger, middle finger and ring finger standing up and flexing the thumb and pinky. Let’s try to do it now. You can see you generally would press the pinky with your thumb. Try to press your thumb with your pinky now. Why does the ring finger bend at the same time? The harder your pinky presses, the more your ring finger bends. Switching finger position will make the gesture weird! Only very few people can do the swear gesture with their thumb on their pinky.
You need the flexor tendon on the finger to finish the finger movement. The ring finger has no independent tendon and the tendon that drives the ring finger and the pinky is bifurcated. Therefore, when the pinky is bent, the ring finger will be pulled and cannot fully straighten.