Comprehensive Osteopathic Medical Licensing Examination (COMLEX USA) Practice

What does the term 'active' refer to in the context of barrier limits during assessment?

1. Physiologic barrier

2. Restrictive barrier

3. Anatomic barrier

4. Passive barrier

The correct answer is: Physiologic barrier

In the context of barrier limits during assessment, the term 'active' refers to the physiologic barrier. This barrier represents the point at which the patient can actively move their joint or body part to its fullest extent without assistance. It denotes the maximum range of motion achievable through voluntary muscle contraction, which is influenced by the lengths and strengths of the muscles involved, as well as any neural control mechanisms. Understanding the physiologic barrier is crucial for assessing a patient's movement capabilities and determining treatment protocols in osteopathic medicine. It contrasts with other barriers like the anatomic barrier, which represents the limit imposed by the anatomy of the joint or soft tissue, and the restrictive barrier, which is a functional limit that inhibits full movement, often due to factors like tension or inflammation. The concept of passive barriers refers to the limits reached when an external force is applied, rather than active muscle movement. Recognizing these distinctions helps practitioners to develop effective treatment plans and to understand the mechanics of the body during evaluation.