Tendons are soft tissues that connect muscles to bones. When muscles contract, tendons pull the bones causing the finger to move. The extrinsic muscles attach to finger bones through long tendons that extend from the forearm through the wrist.

How do the fingers move?

Fingers are constructed of ligaments (strong supportive tissue connecting bone to bone), tendons (attachment tissue from muscle to bone), and three phalanges (bones). There are no muscles in the fingers; and fingers move by the pull of forearm muscles on the tendons.

What is the function of the finger bone?

Flexion and extension: Moving the base of fingers toward and away from the palm and moving the two parts of the fingers toward and away from the base of the fingers. Adduction and abduction: Moving the fingers toward and away from the middle finger.