Anderson Cooper: This week on 60 Minutes, we're doing a story about efforts to help people who are paralyzed with severe spinal cord injuries develop the ability to walk again. And not just walk again ...

The effects of spinal cord injuries are complex and multifaceted. People lose not only the ability to control the movement of their limbs, but also the ability to receive sensory feedback from them.

In new results from a clinical trial, researchers show that electrical stimulation of the spinal cord can restore the muscle control and sensory feedback required for coordinated walking movements.