The Trapezius Muscle is a large, triangular muscle that spans the upper back and neck, with significant relevance in orthopaedics due to its role in shoulder and neck movements. It has three distinct parts: the upper or descending, middle or transverse, and lower or ascending trapezius. In orthopaedics, assessments often involve evaluating the trapezius in cases of neck pain, shoulder dysfunction, or postural issues. Dysfunction in the trapezius can contribute to conditions like myofascial pain syndrome or shoulder impingement. Rehabilitation strategies for trapezius-related issues in orthopaedics may include exercises targeting specific portions of the muscle to address imbalances and improve shoulder stability. Physical therapists work to optimize posture, alleviate pain, and enhance overall upper body function. Understanding the anatomy and function of the trapezius muscle is essential in orthopaedics for diagnosing and managing conditions related to the shoulder and neck, contributing to comprehensive musculoskeletal care and effective rehabilitation.