Stroke is a serious medical condition that happens when blood flow to part of the brain is blocked or reduced. This can damage brain cells and lead to problems with movement, speech, and thinking.

Almost half of patients who experienced a stroke in the right cerebral hemisphere later develop a very unusual symptom: they lose the ability to perceive what is happening in the left side of space.

The Nature Index 2025 Research Leaders — previously known as Annual Tables — reveal the leading institutions and countries/territories in the natural and health sciences, according to their output in ...