How do invasive techniques record signals from the brain?
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Invasive techniques to record signals from the brain involve placing electrodes or other devices directly into the brain tissue. This allows for a higher resolution and more precise recording of neural activity compared to non-invasive methods such as electroencephalography (EEG) or functional magnetic resonance imaging (fMRI).

There are several types of invasive techniques used to record signals from the brain:

Microelectrode Arrays: These are small electrodes that can be implanted into specific regions of the brain to record the activity of individual neurons. They are commonly used in research to study neural activity in animals and humans.

Depth Electrodes: These are long, thin electrodes that are inserted deep into the brain to record activity from specific structures or regions. They are often used in clinical settings to locate the source of epileptic seizures.

Electrocorticography (ECoG): This involves placing a grid of electrodes directly on the surface of the brain. It is often used in neurosurgery to identify areas of the brain responsible for specific functions, such as language or motor function.

Intracranial EEG (iEEG): This involves placing electrodes directly on the surface or within the brain to record electrical activity. It is often used in research to study neural activity in patients with neurological disorders, such as epilepsy.

Invasive techniques to record signals from the brain are highly specialized and typically require a skilled neurosurgeon to perform the procedure. While they can provide valuable insights into neural activity, they also carry risks such as infection, bleeding, and damage to brain tissue.
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