Comprehensive Osteopathic Medical Licensing Examination (COMLEX USA) Practice

What term describes the limit of action beyond normal physiologic range in passive motion examined?

1. Passive limit

2. Physiologic limit

3. Anatomic limit

4. End range limit

The correct answer is: Anatomic limit

The term that describes the limit of action beyond the normal physiologic range in passive motion is referred to as the anatomic limit. This concept indicates the maximum extent to which a joint can be moved passively, beyond the active range of motion without causing injury. The anatomic limit is determined by the structural integrity of the joint, including the bony architecture, soft tissue constraints such as ligaments and tendons, and the configuration of surrounding muscles. In clinical practice, understanding the difference between the anatomic limit and other types of limits is critical for assessing joint function and identifying potential underlying issues. For example, the physiologic limit refers to the range of motion available under normal conditions without causing discomfort or harm, while the end range limit typically pertains to the maximum reach of motion just before the onset of pain. The passive limit may refer more generally to the extent of passive movement that can be achieved but does not necessarily indicate the structural constraints that the anatomic limit describes. Recognizing the anatomic limit is vital when considering interventions, therapeutic exercises, or manual therapy techniques, as it assists practitioners in maintaining joint integrity while promoting safe movement patterns.