Jon Hamilton

An international consortium involving hundreds of scientists has unveiled highly detailed maps of the brain area that controls movement.

The maps reveal the location, function and appearance of more than 100 cell types found in the motor cortex in mice, marmoset monkeys, and people, the scientists report in 17 studies that appear in the journal Nature.

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People who have had a stroke appear to regain more hand and arm function if intensive rehabilitation starts two to three months after the injury to their brain.

A study of 72 stroke patients suggests this is a "critical period," when the brain has the greatest capacity to rewire, a team reports in this week's journal PNAS.

Updated September 15, 2021 at 1:15 PM ET

A treatment that simulates the loss of an eye may help adults with the vision impairment known as amblyopia or "lazy eye."

Studies in mice and cats suggest that the approach allows the brain to rewire in a way that restores normal vision, a team reports this week in the journal eLife.

Nearly 200 miles from the nearest ocean, nine surfers are bobbing beneath the Texas sun in what looks like a tropical lagoon.

Then a sound like a muffled jet engine fills the air, overwhelming a reggae song coming from shore.

One surfer starts to paddle, and a head-high wave rises seemingly from nowhere to carry him down the line toward the sandy beach.

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A water park near Waco, Texas, has an artificial wave that's allegedly so dope pro surfers are joining hobbyists to ride it. NPR's Jon Hamilton caught a couple waves there and brought us this.

Nearly two months after the Alzheimer's drug Aduhelm received conditional approval from the Food and Drug Administration, experts are still debating how, and whether, it should be used.

Before she got COVID-19, Cassandra Hernandez, 38, was in great shape — both physically and mentally.

"I'm a nurse," she says. "I work with surgeons and my memory was sharp."

Then, in June 2020, COVID-19 struck Hernandez and several others in her unit at a large hospital in San Antonio.

"I went home after working a 12-hour shift and sat down to eat a pint of ice cream with my husband and I couldn't taste it," she says.

The loss of taste and smell can be an early sign that COVID-19 is affecting a brain area that helps us sense odors.

Soon after Phillip Lynn got married in 2014, he began to forget things. He'd repeat himself. He'd get lost in places close to the couple's home in a suburb of St. Louis.

Then in 2016, his spouse, Kurt Rehwinkel, realized that Lynn's memory problems had become more severe.

They'd just visited some friends who'd gone to Hawaii with them three months earlier. When they'd talked about the trip, Lynn had become confused.

People recovering from a stroke will soon have access to a device that can help restore a disabled hand.

The Food And Drug Administration has authorized a device called IpsiHand, which uses signals from the uninjured side of a patient's brain to help rewire circuits controlling the hand, wrist and arm.