A presentation slide titled 'Neurostimulation' compares Open-Loop and Closed-Loop systems. The Open-Loop section describes Deep Brain Stimulation (DBS) systems, highlighting fixed-schedule electrical stimulation, lack of real-time neural activity feedback, and implantation in the chest. The Closed-Loop section discusses Responsive Neurostimulation (RNS) systems, which detect seizure activity, deliver targeted electrical pulses, continuously monitor activity, and are implanted in the skull. The slide includes X-ray images of head implants for each system.