Cerebral small vessel disease affects the brain's small blood vessels and can contribute to stroke, cognitive impairment, gait problems and vascular dementia.

Amyotrophic lateral sclerosis (ALS) is a progressive motor neuron disease causing muscle weakness, wasting and respiratory impairment. Learn about symptoms, diagnosis and rehabilitation.

Waking up with a “dead arm” or sudden numbness? Discover why this happens, when it’s harmless, and when it could be a sign of something more serious.

Headaches after skipping coffee are a sign of caffeine withdrawal. Learn what happens in your brain, how long symptoms last, and how to prevent caffeine headaches.

Waking up with numb or tingling arms? Learn why this happens, when to worry, and how to stop your arms from falling asleep at night.