Until recently, our relationship with technology was limited to direct, physical command. To make a device perform an action, you need to tap or talk to it. All that could change with this new technology called brain-computer interfaces. This amazing technology will not only renew military applications, but more importantly, it will substantially help the medical community. It offers the possibility of sound to the deaf, sight to the blind and movement to the disabled. However, all great ideas have a downside: there are many technical and ethical issues that people are not willing to risk. A brain-computer interface, also known as BCI, is a technology that allows a device to respond to neural signals from the brain. brain and transform them into actions controlled by a subject (Kotchetkov 1). The device used to achieve this is called an electroencephalograph, also known as an EEG. There are two ways to use this device, invasive and non-invasive. The invasive method involves implanting the device directly into the brain, while the non-invasive method involves just placing the device on the surface of the scalp. The only reason this technology exists is because of the way our brains work. “Our brain is full of neurons, individual nerve cells connected to each other by dendrites and axons.222 Every time we think, move, feel, or remember something, our neurons are at work” (Grabianowski 1). Brain-computer interfaces provide a wide range of possibilities for people with physical disabilities. This could change the lives of thousands of people, think of all the people suffering from illnesses or complications such as paralysis, locked-in syndrome, stroke or serious brain trauma. B......middle of paper......rosthetic hand”. University of Chicago Medical Center, October 14, 2013. sciencedaily.com. April 6, 2014. Castillo, Michelle. “Quadriplegic woman uses brain to drink coffee with help from robotic arm.” CBS News, May 16, 2012. cbsnew.com. 6 April 2014Grabianowski, ed. “How the brain-computer interface works.” How Stuff Works .Inc, November 2, 2007. howstuffworks.com. March 31, 2014 Kacapyr, Vasyl. "Brain reports more paralyzed limbs in new experiment." Cornell University, February 19, 2014. sciencedaily.com. April 6, 2014 Kotchetkov, Ivan. Hwang, Brian. Appelboom, Geoffrey. Kellner, Christopher. Connoly, Sander Jr. "Brain-Computer Interfaces: Military, Neurosurgical, and Ethical Perspectives." American Association of Neurological Surgeons, 2010. medscape.com. April 6, 2014 Wilson, L. Richard. “Ethical problem of brain-computer interfaces (BCI)”. NP and iacap.org. April 6, 2014