Revolutionary spine implants let paraplegics walk again

Scientists in Switzerland have developed a spinal implant system enabling paraplegic patients to walk and cycle. The system includes a gel pack with electric leads tailored for each patient, implanted on the spinal cord. Powered by a pacemaker in the abdomen, it connects wirelessly to a tablet. Patients use the software to choose activities like standing, walking, or cycling. The software sends instructions to the pacemaker, which stimulates nerves to control leg and trunk muscles, allowing movement.

What role do electrical pulses play in the functioning of the spinal implant?

Explain how the system allows paraplegic patients to perform activities like walking or cycling.