Which muscles are noted as having impaired relaxation in neck muscle dysfunction?

• A. SCM, scalenes, upper trapezius
• B. Biceps brachii
• C. Rectus abdominis
• D. Soleus

Answer: (A)

When neck muscle dysfunction shows impaired relaxation, the muscles most often involved are those that directly control head and neck posture and are easily activated and held in a tense state. The sternocleidomastoid, scalenes, and upper trapezius fit this pattern because they are superficial, frequently recruited to stabilize the head and neck, and tend to develop chronic tightness with poor posture, stress, or overuse. After activity, these muscles may not fully relax, contributing to persistent stiffness, headaches, and restricted range of motion. The other muscles listed—biceps brachii, rectus abdominis, and soleus—are not neck muscles and are not typically described as having impaired relaxation in neck dysfunction, so they do not explain this pattern.