Chapter 23: Musculoskeletal System

Musculoskeletal System systematically breaks down the anatomy and physiology of the 206 bones, varying joint types (fibrous, cartilaginous, and freely movable synovial joints), and skeletal muscles, offering detailed insights into the mechanical roles of articular cartilage, ligaments, tendons, and fluid-filled bursae. The text meticulously outlines the objective physical assessment protocols—including inspection for deformities, palpation for temperature and crepitation, active and passive range of motion (ROM) testing across multiple axes, and muscle strength grading on a zero to five scale. It guides the practitioner through localized examinations of major articulations, such as the temporomandibular joint (TMJ), the cervical and lumbar spine, the shoulder's glenohumeral joint and rotator cuff, the elbow, wrist, hip, knee, and ankle. Crucial diagnostic maneuvers are integrated throughout, highlighting the Phalen test and Tinel sign for identifying carpal tunnel syndrome, the bulge sign and ballottement for detecting knee effusion, the McMurray test for meniscal tears, and the straight leg raising (Lasègue) test for confirming herniated intervertebral discs. Furthermore, the chapter delves into developmental competence across the lifespan, illustrating pediatric screening techniques like the Ortolani maneuver and Allis test for developmental dysplasia of the hip, postural adaptations such as progressive lordosis during pregnancy, and age-related changes including bone mineral density loss, osteoporosis risk, and kyphosis in the aging adult. It integrates essential subjective data collection focused on evaluating the impact of joint pain, myalgia, and stiffness on a patient's activities of daily living (ADLs), alongside targeted health promotion strategies emphasizing calcium and vitamin D intake, weight-bearing exercise, DEXA screening, and fall prevention. Finally, the chapter provides an extensive clinical review of musculoskeletal abnormalities, differentiating between systemic inflammatory conditions like rheumatoid arthritis and ankylosing spondylitis, degenerative diseases such as osteoarthritis, and localized pathologies including gout, scoliosis, epicondylitis, and pediatric congenital conditions like clubfoot and spina bifida, making it an indispensable resource for mastering clinical evaluations.