A brain computer interface (BCI) is a device that allows people with cognitive or motor disabilities to control computers or other devices. BCIs make use of a variety of sensors, recording methods using signal processing algorithms, as well as machine learning to translate brain signals into operational commands. They can operate a wide range of devices, from cursors on computers to wheelchairs and robotic arms.
Most BCIs measure activity from the scalp, such as electroencephalographic (EEG) or functional near-infrared imaging (fNIRS) signaling. The signals are recorded by a sensor which detects the activity of neuronal neurons. Software converts them to operating commands.
In many BCI systems users have to go through an iterative course of training to how to generate signals that the system recognizes. For instance, in a BCI that is specifically designed to type letters the user will have to imagine moving their left or right https://hive-eu.org hand.
The most exciting BCI advancements involve implantable or invasive systems that record directly from the neural tissue, not the scalp. These devices are more precise than noninvasive BCIs but they require surgery and come with risks.
Invasive BCIs are still in the early stages of development, and it is critical that patients who undergo this procedure fully comprehend the dangers and benefits of this technology. Security and privacy are also major concerns since BCIs read neural signals that could be containing sensitive information regarding health or behavior. Some people are against BCIs because they fear that others can hack into their minds and influence them.
