Neurological disorders
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Global Burden of Neurological Disorders
Neurological disorders are now recognized as a leading cause of disability and the second leading cause of death worldwide, affecting over 40% of the global population and accounting for more than 443 million disability-adjusted life years (DALYs) in 2021. The burden of these disorders has increased significantly over the past three decades, mainly due to population growth and aging, despite decreases in age-standardized rates of death and disability for some conditions 1235+2 MORE.
Most Prevalent and Impactful Neurological Disorders
The most common neurological disorders globally include stroke, migraine, Alzheimer's disease and other dementias, tension-type headache, and epilepsy. Stroke is the largest contributor to both deaths and DALYs, followed by neonatal encephalopathy, migraine, and dementias. In Europe and the US, stroke, dementias, and headache are the top causes of neurological disease burden, with the burden peaking in older adults 1346+2 MORE.
Trends and Regional Variations
From 1990 to 2021, the absolute number of deaths and DALYs from neurological disorders increased, but age-standardized rates decreased, indicating that demographic changes are driving the overall rise. Communicable neurological disorders (like meningitis and encephalitis) have seen sharp declines, while non-communicable disorders (such as Alzheimer's and Parkinson's disease) have increased, especially in high-income and aging populations. There are substantial regional and national differences in the burden, with low-income countries facing higher rates of communicable neurological disorders and high-income countries experiencing more age-related conditions 1346+2 MORE.
Risk Factors and Prevention Challenges
Most of the burden from neurological disorders cannot be explained by known modifiable risk factors, except for stroke (where high blood pressure and metabolic risks are significant contributors) and, to a lesser extent, Alzheimer's disease and epilepsy. This highlights a major gap in prevention strategies and the urgent need for more research to identify effective interventions for most neurological conditions 2368.
Impact on Health Systems and Policy Needs
The growing number of people living with neurological disorders is placing increasing demands on health care systems worldwide. This is especially challenging in low- and middle-income countries, where resources and access to quality neurological care are limited. There is a pressing need for region-specific strategies, better resource allocation, and global collaboration to address these challenges and improve prevention, diagnosis, and care 2356+1 MORE.
Advances in Detection and Research Directions
Recent advances in neuroimaging and computational tools, including machine learning and deep learning, are improving the detection and classification of neurological disorders. However, challenges remain, such as limited datasets and the complexity of brain function, which require further research and innovation in both technology and clinical practice .
Conclusion
Neurological disorders are a major and growing global health challenge, driven by demographic changes and limited progress in prevention for most conditions. Stroke, migraine, and dementias are the most significant contributors to the burden. Addressing this challenge requires urgent action in research, health care planning, and policy, with a focus on both global and region-specific needs 1234+5 MORE.
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