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=== Invasiveness ===
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*Invasive
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**Invasive BCIs are implanted directly into the brain.
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*Non-Invasive
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**Non-invasive BCIs are placed outside of the brain.
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=== Activity ===
*Active BCI:
*Active BCI:
**“An active BCI is a BCI which derives its outputs from brain activity which is directly consciously controlled by the user, independently from external events, for controlling an application.”
**“An active BCI is a BCI which derives its outputs from brain activity which is directly consciously controlled by the user, independently from external events, for controlling an application.”
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**Measures Tonic states (degree of “relaxation”, cognitive load, ...)
**Measures Tonic states (degree of “relaxation”, cognitive load, ...)
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=== Input and Output===
These are the 5 types of BCI systems based on the possible combinations of input and output sources for the brain (neuroimaging / neurostimulation) and body (peripheral inputs and outputs such as keyboards and screens).
These are the 5 types of BCI systems based on the possible combinations of input and output sources for the brain (neuroimaging / neurostimulation) and body (peripheral inputs and outputs such as keyboards and screens).
*[A] Open-Loop Efferent BCI
*[A] Open-Loop Efferent BCI