Right forearm vascular tendon nerve open rupture for more than 50 days, the finger can’t dorsiflex alone may be tendon or nerve is not completely healed. 1. Tendon is not healed: tendon is a dense connective tissue in the form of cord or membrane at both ends of the muscle belly, the tendon of a muscle is attached to two or more bones, and its traction makes the muscle contraction to drive the movement of different bones. When the tendon attached to the finger is damaged and not healed, its traction effect disappears, making the finger unable to move alone. 2. Nerves are not healed: the somatic nervous system can control body movement, including sensory nerve fibers and motor nerve fibers. Sensory nerve fibers transmit sensations collected by the sensory organs in various parts of the body to the central nervous system, while motor nerve fibers transmit commands from the central nervous system to the skeletal muscles to produce movement. Damage to this system can result in an inability to move the muscles it controls. The exact cause of the disease can only be determined after a relevant examination at the hospital. Patients who experience the inability to dorsiflex their fingers individually are advised to go to the hospital for prompt medical attention.