(22nd-March-2020)
This technology became real when the brain function imaging technology, such as MRI, was used to monitor the activity of the brain alive, since the 1990s. BMI can be broadly classified into two types: invasive with skull craniotomy and non-invasive with no skull craniotomy. By combining these two types, more practical and advanced activities become possible.
A typical invasive BMI are here.
Extracellular recording (SUA, MUA, LFP) Cortical EEG (ECoG)
ECoG is a method of placing electrodes in a relatively safe place such as subdural (partially invasive), and extracellular recording is a method of implanting electrodes directly in the brain.
Research has also been conducted to access all the neurons in the brain by passing an ultrafine wire of about 100 nm through the capillaries that supply blood to each neuron in the brain.
The invasive method allows high-precision reading, but has problems such as risk of infection and brain damage due to surgery, and deterioration of electrodes over time.
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