Exposing mice to an hour of 40-hertz stimuli every day for a week reduced levels of amyloid-β plaques and tau protein, and improved cognition.

Watch the video, which shows a duck infected with H5N1 and showing signs of Parkinson's disease, that inspired Thomas Jefferson University researcher Richard Smeyne to explore the connection between viral infection and neurodegeneration.

Pathogens can take various routes to pass the blood brain barrier and damage cells.

Scientists may need to seriously reconsider the cast-aside hypothesis that pathogens can play a part in diseases such as Alzheimer’s and Parkinson’s.

A missing microRNA leads to degenerating neurons and blindness in a fruit fly.

An enzyme of the bacteria Porphyromonas gingivalis has been found in the brains of patients with the disorder, and causes neurodegeneration in mice.

The observation could pave the way for a blood test to predict disease progression in people with a genetic predisposition to developing the neurodegenerative disorder.

Human endogenous retroviruses that colonized vertebrate DNA millions of years ago have long been dismissed as junk DNA, but researchers now know that they may play important roles in cancer, neurodegeneration, and other ailments.

Clinical trials that target human endogenous retroviruses to treat multiple sclerosis, ALS, and other ailments are underway, but many questions remain about how these sequences may disrupt our biology.