A new study suggests chronic insomnia may be an early warning sign or contributor to cognitive decline.

A new study out of Northwestern Medicine finds evidence of the human pegivirus in the brains of people with Parkinson’s disease, but not in the brains of people without the neurological condition.

Results of a phase 3 clinical trial show an experimental drug called tolebrutinib can delay disability in patients with non-relapsing secondary progressive multiple sclerosis.

A simple blood test can help diagnose Alzheimer’s and accurately distinguish between early- and later-stage disease, a new study finds.

People with low LDL cholesterol levels are much less likely to be diagnosed with dementia and Alzheimer’s disease, according to new research.

A new study finds sucralose, the primary sweetener in Splenda, changes brain activity related to hunger. Researchers say the results could be stronger cravings.

Clinical psychologists reviewed 100 ADHD TikToks and found that fewer than half of their claims about symptoms align with clinical guidelines for diagnosing the condition.

Patients with obstructive sleep apnea may have higher odds of developing Parkinson’s disease, but researchers say early CPAP treatment may lower the risk.

A new study finds 43% of people with Long COVID symptoms still have SARS-CoV-2 proteins circulating in their blood 1 to 14 months after testing positive.