Which Finger Is the Thumb

The thumb is the first digit of the hand, next to the index finger. When a person is standing in the medical anatomical position (where the palm is facing to the front), the thumb is the outermost digit.

Do we have 4 fingers and a thumb?

One of the basic facts about our hands is that they each possess four fingers and a thumb: five digits in total.

Why do we have 4 fingers and 1 thumb?

While it is (relatively) easy from evolutionary forces to “grow” longer digits, relocate one digit to create an opposable thumb or shrink a tail into a coccyx, generating an additional digit is a very (evolutionary) prospect, no matter how attractive it might seem.