Neurodegenerative Disease

Neurodegenerative diseases are a group of disorders characterized by the progressive loss of specific neuronal populations due to mechanisms including proteotoxic stress, oxidative stress, neuroinflammation, and apoptosis, ultimately resulting in neuronal dysfunction and death. These conditions exhibit distinct clinical presentations and anatomical patterns of degeneration, such as Alzheimer’s disease, Parkinson’s disease, frontotemporal degenerations, extrapyramidal disorders, and spinocerebellar ataxias. They can be classified based on primary clinical features, anatomical distribution of pathology, or underlying protein abnormalities—such as amyloidoses, tauopathies, α-synucleinopathies, and TDP-43 proteinopathies. While some patients present with pure syndromes, others display mixed features, reflecting the complex and heterogeneous nature of these disorders.