A degree of freedom is one modeled axis of motion. This rig renders 26 axes, while coupled mode uses 20 independent inputs because distal and palm motion can be derived.
Anatomical coupling makes DIP flexion follow PIP. Ring and little metacarpals rotate and translate to curve the palm around a grasp.
This is an educational rigid-link kinematic simulator—not an exact biological hand or a claim of full human functional replication.
Future extensionsSoft-tissue deformation, tendon and muscle dynamics, tactile sensing, collision and friction, pressure distribution, and physical grasp forces are not implemented in this prototype.