These are our choices for the best SUVs and crossovers of 2015. If youâre looking for the best small, mid-size or luxury SUVs and crossovers, youâll find them here. 1  Nissan Juke.  BMW X1.
The shoulder and hip joints form the only ball and socket joints in the body. These joints have the freest range of motion of any joint in the body â they are the only joints that can move in a full circle and rotate around their axis. However, the drawback to the ball and socket joint is that its free range of motion makes it more susceptible to dislocation than less mobile joints.
A useful reference page here for all you personal trainers, all the anatomical joint actions and the three movement planes are explained here What are joints? The human skeleton is made up of different shaped bones that align with each other.