College of Massage Therapists of British Columbia (CMTBC) Practice Exam

What are the clinical signs and symptoms associated with facet lock?

1. Reduced range of motion

2. Pain on palpation of the spine

3. Loss of muscle strength

4. Swelling around the joint

The correct answer is: Reduced range of motion

Facet lock, also known as facet joint dysfunction or facet syndrome, is characterized by the impairment of the movement of the facet joints in the spine. This condition typically results in mechanical restrictions, leading to notable clinical signs and symptoms. Reduced range of motion is a primary symptom associated with facet lock. When one of the facet joints in the spine becomes locked or misaligned, it can inhibit the normal motion of the vertebrae. This restriction often manifests as stiffness and difficulty in bending, twisting, or turning the body. Patients may find it challenging to achieve full range movements, such as during activities that involve flexion, extension, or rotation of the spine. In addition to reduced range of motion, patients might experience other symptoms such as pain on palpation of the spine or even muscle tightness. However, the defining characteristic of facet lock remains the significant reduction in the ability to move normally at the affected segment, making the loss of mobility the most distinctive clinical sign in this context.