The burden of death and disability caused by neurological abnormalities is being recognized as a global public health issue which is set to increase during the next few decades. This is a result of aging population and lifestyle changes. Brain–computer interface (BCI), an emerging technology that facilitates communication between brain and computer, is considered as a ray of hope to tackle this menace and has attracted a great amount of interest in recent years. BCI has proven that it can restore the capabilities of brain by overcoming the neurological distortions, caused due to neurodegeneration conditions such as amyotrophic lateral sclerosis, Parkinson’s disease, Alzheimer’s disease, and spinal muscular atrophy, thus improving the quality of lives of people suffering from physical and mental challenges.
BCI system basically comprises of four essential components such as signal acquisition, feature extraction, feature translation and device output. The primary function of BCI is to detect and quantify features of signals received from brain which are indicators of the person’s intentions and later translate these features in real time into device commands that accomplish the person’s intent.