Until recently, our relationship with technology has been limited to physical, direct command. For a device to act, you must touch or speak to it. All that could change with this new technology called brain-computer interfaces. This amazing technology will not only reorganize military applications, but above all significantly help the medical community. It brings the possibility of sound to the deaf, of sight to the blind and of movement to the disabled. However, every good idea has 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 coming from the brain and transform them into actions controlled by a subject (Kotchetkov 1). The device they use to do this is called an electroencephalograph, also called an EEG. There are two ways to use this device, invasive and non-invasive. The invasive method requires the device to be implanted directly into the brain, while the non-invasive method only involves placing the device on the surface of the scalp. The only reason this technology exists is because our brains work. “Our brains are 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 offer a wide range of possibilities. 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 severe head trauma. B...... middle of paper ...... Prosthetic hand”. University of Chicago Medical Center, October 14, 2013. sciencedaily.com. April 6, 2014. Castillo, Michelle. "A quadriplegic woman uses her brain to drink coffee with the help of a robotic arm". CBS News, May 16, 2012. cbsnew.com. April 6, 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, Christophe. 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