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What is a Brain Computer Interface?

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 different combinations of sensors, recording methods, signal-processing algorithms, and machine learning to convert brain signals into operating commands. They are able to operate a broad variety of devices, from cursors on computer screens 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 then recorded by a sensor which detects the presence of neuronal activity and software converts them into operating instructions.

In a lot of BCI systems, the user must go through an iterative training process to understand how to create signals that are Comprar cialis generico barato en españa recognized by the system. For example the BCI designed to type letters requires users to imagine that they are moving their left or right hand to produce human-machine interaction the desired movement imagery.

The most exciting BCI advancements involve implantable or noninvasive systems that record directly from the neural tissue, not the scalp. These devices are more precise than noninvasive BCIs, but they also require surgical intervention and pose some risk.

BCIs that are infected are still being developed and patients should be aware of the risks and benefits. Privacy and data security are also a major concern, because BCIs read neural signals that could contain sensitive information regarding health or behavior. Some people object to the technology for ethical reasons, fearing that others could hack into their minds and take control of them.

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Alvaro Galindo

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