Chapter 25: Musculoskeletal Function & Aging

Musculoskeletal Function & Aging exploration of geriatric musculoskeletal health examines the physiological shifts and pathological conditions that frequently impact the aging population, emphasizing the vital connection between mobility, independence, and overall quality of life. The discussion begins with the structural changes inherent in the aging process, such as the gradual loss of muscle mass and strength, the replacement of muscle tissue with fibrous connective tissue, and a decrease in bone density that often results in reduced height and shifted posture. A significant focus is placed on the high incidence of falls among older adults, which often leads to debilitating fractures; specifically, hip fractures are identified as the most disabling, frequently resulting in a downward trajectory of health due to complications from immobility. The text distinguishes between various forms of arthritis, contrasting the noninflammatory, wear-and-tear nature of osteoarthritis—noted for cartilage deterioration and bony enlargements like Heberden nodes—with the systemic autoimmune response of rheumatoid arthritis, which causes synovial thickening and distinct joint deformities such as ulnar drift. Metabolic bone disorders are also detailed, including gouty arthritis, characterized by the painful accumulation of uric acid crystals, and osteoporosis, often termed a "silent killer" because it remains asymptomatic until a fragility fracture occurs. Further clinical analysis is provided for Paget disease, involving abnormal and weak bone remodeling, and osteomyelitis, a persistent bone infection often complicating advanced pressure ulcers. The chapter also addresses the complexities of lower extremity amputations, most commonly necessitated by peripheral vascular disease or diabetes, and highlights the importance of managing phantom limb sensations and prosthetic rehabilitation. Additionally, it covers polymyalgia rheumatica, a condition causing sudden proximal muscle stiffness, and common podiatric issues like bunions, corns, and fungal nail infections that can significantly impair an individual's gait. Throughout these conditions, the nursing role is centered on comprehensive assessment, multifaceted pain management, the use of assistive devices like walkers and canes, and the promotion of weight-bearing exercise to prevent functional decline and maintain autonomy.