This lecture by the instructor focuses on the importance of practice and training in rehabilitation, specifically in improving motor function and memory retention. The discussion delves into the neural mechanisms involved in declarative and procedural memory, emphasizing the need for continued practice to maintain gains made in the laboratory setting. The lecture also explores the use of various forms of stimulation, such as peripheral nerve stimulation and vibration, to activate specific neural circuits and enhance motor function. Additionally, the instructor highlights the significance of effortful training in achieving functional improvements, particularly in individuals with spinal cord injuries. The presentation concludes with insights on the role of sensory input in activating motor cortex and the potential of cortical stimulation for enhancing walking function.