Brain-computer interface: systems and interacting devices

Abstract

In the past, mind control was thought to be a fantasy beyond human intelligence. Over the last few decades, significant advances have been made, such as the invention of novel devices for enhancing information flow into computers through multimodel devices. Brain-Computer Interface (BCI) was initially developed to build communication between paralyzed people and the environment. BCI variously improves human life in the field of medicine, entertainment, security and etc. This paper focuses on the technologies and principles behind the BCI. The paper also discusses the various steps in the BCI system: signal acquisition, preprocessing, feature extraction, and classification. The key challenge in BCI signal processing is the curse of dimensionality in the feature vector. Further, the paper focuses on the BCI communication methods, such as invasive, semi-invasive, and non-invasive BCI, advantages, and limitations.