INVASIVE BRAIN COMPUTER INTERFACING

Brain computer interfacing is a technology that bridges the human brain and an external machine. The idea is to capture the brain signals and use it to actuate an external device like a robotic arm, after signal processing. This technology promises to restore the mobility in people suffering from CNS (CENTRAL NERVOUS SYSTEM) disorders, which impairs the motor movements. There are basically two types of BCI, the invasive, non invasive. In case of noninvasive bci, signals are extracted from the skull as a result it suffers from poor spatial resolution, signal dampening, limited mobility etc. In case of the invasive bci, a set of microelectrodes are implanted in the primary motor cortex and this method has its own disadvantages. These include tissue scar, complex equipments for signal processing, bulky power supply, high power consumption due to radio communication and the necessity of frequent surgery for replacement of the chip and the power supply. Our project focuses on the enhancement of chip design. This chip will be implanted invasively in the primary motor cortex of the cerebrum that governs the motor movements. We have proposed the usage of volume conduction property for the communication between the chip and the external device and x shape antennae for the signal transmission. We have also introduced a new method of supplying power to the chip which uses the blood flow inside the brain to run a nano size turbine to generate power to the chip. With the above mentioned features the disadvantages of the invasive bci can be overcome and helps achieve complex task in reality. With the advancement of this technology physical challenges for paralyzed persons will no more be a dream.