Parkinson's disease

Overview

Parkinson's disease (PD) is a chronic, progressive neurodegenerative condition that primarily affects movement, while also influencing mood, sleep, cognition, digestion, and autonomic function. It is classically associated with tremor, slowness of movement (bradykinesia), muscular rigidity, and postural instability, but many people experience non-motor symptoms years before the hallmark motor signs become apparent. These may include constipation, reduced sense of smell, REM sleep behavior disorder, depression, anxiety, and fatigue. Because of this broad clinical picture, Parkinson's disease is increasingly understood as a multisystem disorder, not solely a movement condition.

At a biological level, Parkinson's disease is linked to the gradual loss of dopamine-producing neurons in the substantia nigra, a region of the midbrain involved in coordinating movement. Another key feature is the accumulation of abnormal alpha-synuclein protein aggregates, often described as Lewy bodies and Lewy neurites. Research suggests that Parkinson's disease develops through a combination of genetic susceptibility, aging-related changes, environmental exposures, mitochondrial dysfunction, oxidative stress, inflammation, and altered protein handling. In most cases, no single cause is identified, though a minority of cases are associated with known genetic variants.

Parkinson's disease becomes more common with age, and global prevalence has risen substantially as populations live longer. It affects millions of people worldwide and is one of the fastest-growing neurological disorders in terms of disability and societal burden. While symptoms and progression vary widely, the condition can influence mobility, speech, swallowing, work capacity, social participation, and quality of life. For many individuals and families, Parkinson's disease is not only a neurological diagnosis but also a long-term caregiving and rehabilitation challenge.

Although there is currently no cure, many supportive strategies can meaningfully improve day-to-day function and reduce symptom burden. Conventional care often centers on medications, rehabilitation, and, in selected cases, neuromodulation procedures. Complementary and traditional approaches are also commonly explored for symptom support, especially for balance, sleep, stiffness, stress, and overall well-being. Because Parkinson's disease is complex and highly individualized, assessment and care planning are typically most effective when guided by qualified healthcare professionals, including neurology and rehabilitation specialists.