According to function we differentiate non moving joints from slightly and freely moving ones.
(Greek syn = together, arthros = joint, plural synarthroses)
Synarthrotic joints are pretty much immovable, like for example the sternocostal and the tibiofibular joints.
We find a lot of them in the axial skeleton where stability and protection are given priority over mobility.
They provide us with firm bony attachments and help protect our organs.
(Greek amphi = on both sides, arthro = joint, plural amphiarthroses)
Ampharthrotic articulations are generally slightly movable like the joints between the vertebral bodies or the pubic symphysis.
(Greek dia = through, between, across, arthro = joint, plural diarthroses)
A diarthrotic joint is a form of articulation that permits maximal motion, as for synovial joints
Remember our rule of thumb