NeuroWiki Progress is a topic within the NeuroWiki knowledge base covering aspects of neurodegenerative disease research and mechanisms. NeuroWiki serves as a comprehensive, mechanistically-focused knowledge base for neurodegenerative diseases, with particular emphasis on Alzheimer's disease (AD) and Parkinson's disease (PD), while extending coverage to related disorders including ALS, frontotemporal dementia (FTD), Huntington's disease, and atypical parkinsonian syndromes.
Neurodegenerative diseases represent a class of disorders characterized by progressive loss of neuronal structure and function, leading to cognitive decline, motor impairment, and eventual death 1. These conditions affect millions worldwide, with Alzheimer's disease alone affecting over 55 million people globally, a number projected to reach 139 million by 2050 2.
Last Updated: 2026-03-21 08:04 PT
Despite clinical heterogeneity, neurodegenerative diseases share common pathogenic mechanisms including protein misfolding and aggregation, mitochondrial dysfunction, oxidative stress, neuroinflammation, and impaired autophagy 3. Understanding these shared pathways is critical for developing disease-modifying therapies that may benefit multiple conditions.
Protein aggregation is a hallmark of most neurodegenerative disorders. In Alzheimer's disease, amyloid-beta plaques and tau neurofibrillary tangles accumulate in the brain 4. In Parkinson's disease and related disorders, alpha-synuclein forms Lewy bodies 5. ALS features TDP-43 aggregates, while Huntington's disease involves mutant huntingtin protein expansion 6.
The classification of neurodegenerative diseases has evolved significantly, with emerging genetic, neuropathological, and clinical criteria enabling more precise diagnoses 7. This progress has important implications for clinical trial design and therapeutic development.
Alzheimer's disease is the most common cause of dementia, accounting for 60-80% of all dementia cases 8. The disease progresses from subtle memory deficits to severe cognitive impairment, with neuropathological changes beginning decades before clinical symptoms manifest.
Key pathological features include:
Parkinson's disease is the second most common neurodegenerative disorder, affecting approximately 10 million people worldwide 9. The disease is characterized by motor symptoms including resting tremor, bradykinesia, rigidity, and postural instability, while non-motor symptoms encompass cognitive impairment, depression, sleep disorders, and autonomic dysfunction.
Pathologically, Parkinson's disease is characterized by:
Amyotrophic Lateral Sclerosis (ALS) is a rapidly progressive motor neuron disease characterized by muscle weakness, atrophy, and respiratory failure. Genetic factors, including C9orf72, SOD1, FUS, and TARDBP mutations, account for approximately 10-15% of cases 10.
Frontotemporal Dementia (FTD) encompasses a group of disorders characterized by progressive degeneration of the frontal and temporal lobes, leading to behavioral changes and language deficits. The disease shares significant overlap with ALS in terms of genetics and pathology.
Huntington's Disease is an autosomal dominant disorder caused by CAG repeat expansion in the huntingtin gene, leading to progressive motor, cognitive, and psychiatric symptoms.
| Date | Completions |
|---|---|
| 2026-03-19 | 7 |
| 2026-03-20 | 622 |
| 2026-03-21 | 142 |
Summary:
| Type | Total |
|---|---|
| one-shot | 3 |
| one_shot | 775 |
| recurring | 67 |
| Priority | Open | Done |
|---|---|---|
| P0 (90+) | 32 | 258 |
| P1 (70-89) | 21 | 451 |
| P2 (50-69) | 15 | 37 |
| P3 (<50) | 6 | 25 |
| Metric | Value |
|---|---|
| Completed (7 days) | 771 |
| Completed (30 days) | 771 |
| Created (7 days) | 845 |
| Avg completion time | 0.0 days |
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