A brain computer interface is a device that allows people with motor or cognitive impairments to control computers and other devices. BCIs use different combinations of sensors, recording methods signals processing algorithms, machine https://hive-eu.org learning to convert brain signals into operating commands. They are able to control a variety of devices, including cursors on computer monitors as well as 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 that can detect the presence of brain activity and software converts them into operating commands.
In a lot of BCI systems, the user has to undergo an iterative education process to learn how to produce signals that can be recognized by the system. For instance in a BCI that is specifically designed to type letters, the user has to imagine moving their right or left hand.
The most exciting BCI innovations are implantable or invasible systems that can record directly on neural tissue, rather than scalp. These devices are more precise than noninvasive BCIs, but they also require surgical intervention and carry some risk.
BCIs that are invasive are still experimental and patients must be aware of the risks and benefits. Security and privacy are also major concerns because BCIs detect neural signals, which could contain sensitive information about health or behavior. Some people are opposed to the technology due to fear that hackers can gain access to their minds and take control of them.