If you've ever taken lessons in guitar, rock climbing, or any other activity that requires hand strength, you may have wondered how to make your fingers stronger. The answer: strengthen your palm and forearm. That's because your finger doesn't actually contain any muscles, just tendons. These tendons connect to 17 muscles in the palm of your hand and 18 muscles in your forearm, which control the minute movements of your fingers remotely. Add this to other weird facts about your muscles, such as how they have memory, and you start to get a very bizarre picture of the human body.