Comprehensive Osteopathic Medical Licensing Examination (COMLEX USA) Practice

What describes the maximum extent an individual can reach in joint motion without considering the restrictive factors?

1. Physiologic barrier

2. Active barrier

3. Mobility limit

4. Dynamic barrier

The correct answer is: Physiologic barrier

The term that describes the maximum extent an individual can reach in joint motion, without considering any restrictive factors, is known as the physiologic barrier. The physiologic barrier defines the limit of joint movement that can be achieved through voluntary muscle contractions. It represents the range in which an individual can actively and comfortably move a joint without hitting any restrictions, such as ligaments or joint capsules, that would impede further motion. In contrast, other barriers, such as the active barrier, often refer to limitations experienced during active motion, where the individual uses their muscle strength. Mobility limit typically describes the overall range of motion that a joint can achieve, which may include factors of pain or discomfort, while the dynamic barrier refers to limitations during functional movement, influenced by muscle control and stability. Understanding these distinctions is important for accurately assessing joint mobility during examinations and clinical practice.