Researchers report a way to deliver a protein to the brain quickly, effectively, and briefly. The protein degrades naturally after performing its task.

A treatment that combines physical therapy and a noninvasive way to stimulate nerve cells helps people with spinal cord injuries use their hands and arms.

Quadriplegic Robert Chmielewski fed himself dessert using two prosthetic arms he manipulated with his brain. "It's pretty cool," he says.

Precise control over neuron growth paves the way for repairing injuries, including those to the spinal cord, and improving brain models.

"For everything we envision people needing or wanting to do to become independent... they really need two hands working together."

The neurons of itchy turtles show that movement most likely starts in a network of cells, not one "command center."

A new way to inject nanoparticles using a kind of EpiPen could offer treatment for spinal cord injuries and various other inflammatory diseases.