Brain Machine Interfaces: from Basic Science to Neuroprostheses and Neurological Recovery
Dr. Nicolelis has dedicated his career to investigating how the brains of freely behaving animals encode sensory and motor information. As a result of his studies, he was the first to propose and demonstrate that animals and human subjects can use their electrical brain activity to directly control neuroprosthetic devices via brain–machine interfaces (BMI).
Over the past 25 years, Dr. Nicolelis pioneered and perfected the development of a new neurophysiological method, known today as chronic, multi-site, multi-electrode recordings. Using this approach in a variety of animal species, as well as in intra-operative procedures in human patients, he launched a new field of investigation, which aims to measure the concurrent activity and interactions of large populations of single neurons throughout the brain. Through his work, Dr. Nicolelis has discovered a series of key physiological principles that govern the operation of mammalian brain circuits.
Dr. Nicolelis’ pioneering BMI studies have become extremely influential since they offer potential new therapies for patients suffering from severe levels of paralysis, Parkinson’s disease, and epilepsy. Today, many neuroscience laboratories in the United States, Europe, Asia, and Latin America have incorporated Dr. Nicolelis’ experimental paradigm to study a variety of mammalian neuronal systems.
“In this talk, I will describe how state-of-the-art research on brain–machine interfaces makes it possible for the brains of primates to interact directly and in a bi-directional way with mechanical, computational and virtual devices without any interference of the body’s muscles or sensory organs. I will review a series of recent experiments using real-time computational models to investigate how ensembles of neurons encode motor information. These experiments have revealed that brain–machine interfaces can be used not only to study fundamental aspects of neural–ensemble physiology, but they can also serve as an experimental paradigm aimed at testing the design of novel neuroprosthetic devices. I will also describe evidence indicating that continuous operation of a closed–loop brain–machine interface, which utilizes a robotic arm as its main actuator, can induce significant changes in the physiological properties of neural circuits in multiple motor and sensory cortical areas. This research raises the hypothesis that the properties of a robot arm, or other neurally controlled tools, can be assimilated by brain representations as if they were extensions of the subject’s own body.”
The page was last updated on Tuesday, March 31, 2020 - 12:32pm