Both monkeys and humans have a way of thinking that involves recursion, a process of arranging words, phrases, or symbols to convey complex ideas.

Study participants with a history of repetitive head impacts and traumatic brain injury reported greater depression symptoms later than those who didn't.

Stress affects the way you can draw on your memory. That can make planning ahead far more difficult, researchers say.

Using a hearing aid could help people ward off cognitive decline or even help them improve their thinking, researchers find.

An optimistic partner may stave off the risk factors leading to Alzheimer's disease, dementia, and cognitive decline as you grow old together.

Very low doses of lithium could potentially ease the symptoms of Alzheimer's disease, new research in rats suggests.

Three free brain games for your phone can help with memory, attention, and flexible thinking. And unlike with other games, there's research to back up the benefits.

Exposure to toxic chemicals, especially flame retardants and pesticides resulted in more than a million cases of intellectual disability in the US between 2001 and 2016, research finds.

When researchers gave mice drugs that fight brain inflammation, senile rodents showed fewer signs of cognitive decline and could better learn new things.

For older women, too little hydration may affect cognitive performance. But too much can do the same.