Biswarup Neogi, Soumya Ghosal, Achintya Das & D.N.Tibarewala International Journal of Human Computer Interaction (IJHCI), Volume (2) : Issue (2) : 2011 58 An overview on Advanced Research Works on Brain-Computer Interface Biswarup Neogi biswarupneogi@gmail.com Department of Electronics and Communication Engineering, West Bengal University of Technology Kolkata, West Bengal, India. Soumya Ghosal soumyaghosal.2008@gmail.com Department of Information Technology, West Bengal University of Technology Kolkata, West Benga,l India (corresponding author) Achintya Das achintya_das123@yahoo.com Department of Electronics and Communication Engineering, West Bengal University of Technology Kolkata, West Bengal, India. D.N.Tibarewala biomed_ju@yahoo.com Director, School of Bio Science and Engineering Jadavpur University, Kolkata ,West Bengal, India. Abstract A brain–computer interface (BCI) is a proficient result in the research field of human- computer synergy, where direct articulation between brain and an external device occurs resulting in augmenting, assisting and repairing human cognitive. In our overview study past and recent research works on brain computer interface are sincerely explored as well as their productivity in the field of BCI and critical discussions about the proposed research methods for future developments are presented in this paper. Generation of brain-computer interface switch technologies for intermittent (or asynchronous) control in natural environments , developing brain- computer interface by Fuzzy logic Systems , implementation of wavelet theory to drive the efficacies of BCI are few of the advanced and challenging researches on BCI that are still going on and few outcomes are accomplished till now. This paper emphasizes on discussing such and more advanced and recent research trends in BCI modeling and design as the requirements to develop the brain machine interface is also growing day by day for its efficient and faster used in varied technological and scientific uses i.e. like neuropsychological rehabilitation, emotion control, etc. Brief discussions of control theory as well biomedical signal processing technologies has been carried out in this paper for developing brain machine interface system. Keywords: Brain Computer Interface(BCI),Brain Machine Interface(BMI), Steady State Visual Evoked Potential Concept(SSVEP), Electroencephalogram (EEG) , Neuroprosthesis. 1. INTRODUCTION The aim is to build an artificial human being capable of doing everything like a human. But, it is like a perception till now. The research work is going on in the field since (1970 – 75) when only an elementary idea was introduced, but still a long period of time, patience and progressive research work is required to see a capable artificial human being. The central unit (CU) of human or the brain is one of the most important and challenging aspect in the field of prosthesis. The response of the signals from different stimuli from outside or inside the body parts are acknowledged, controlled and channelized by the neurons which are the units of brain. To