system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why does the ring finger have different "mechanics" to the rest of the fingers?
gpt
The tendon from the wrist lies partially below the tendon for the middle finger. The middle finger position restricts the movement of the ring finger. If the middle finger is curled up (tendon fully stretched), the ring finger can't move. If you leave your hand flat on the table and lift repeatedly the ring finger, you'll see the tendon of the middle finger moving upwards too.