I am new to General Relativity and confused by the geodesic equation and MiSaTaQuWa equation. Most of the book saying that the geodesic equation is the motion of a particle in curved-spacetime. However, I read somewhere about this MiSaTaQuWa equation of motion. What is the difference between geodesic equation and this MiSaTaQuWa equation? If I want to describe the motion of a particle in curved-spacetime, which one should I use? The geodesic equation or the MiSaTaQuWa equation? Thanks for the help.