This statement was developed by the Public Health Nursing Definition Document Task Force. under the direction of the leadership of the Public Health Nursing Section of the American. Public Health Association. The statement was adopted by the Public Health Nursing Section.
A pressure balanced Single or Universal Expansion joint is an assembly designed to absorb axial movement and /or lateral deflection while the pressure thrust is balanced by means of an additional bellows and tie rods.
Ball-and-socket joints are classified functionally as multiaxial joints because they can move bones along several axes. The muscles that surround the joints permit the humerus and femur to move away from the bodyâs midline (abduction), toward the bodyâs midline (adduction), forward (flexion), and backwards (extension).