What is the limit of motion usually termed as the point where bone meets bone?

The limit of motion where bone meets bone is referred to as the anatomical barrier. This term describes the endpoint of the passive range of motion for a joint, where further movement is restricted due to the physical contact of the bony structures. The anatomical barrier is crucial in understanding joint stability and the overall mechanics of movement, as it marks the point at which the skeletal elements physically prevent further motion, thereby protecting the joint from injury.

In the context of joint movements, the anatomical barrier is typically identified during a passive assessment, where the clinician moves the body segment beyond the limits of active range of motion. Understanding this barrier helps in the assessment of joint function, indicating the normal limits of movement and informing rehabilitation protocols when dealing with joint injuries.