How do invasive techniques record signals from the brain?
Invasive techniques for recording signals from the brain involve implanting electrodes or other devices directly into brain tissue or the cerebrospinal fluid surrounding the brain. These techniques can provide highly precise and detailed information about brain activity, but they are also more invasive and carry greater risks than non-invasive techniques.

There are several different invasive techniques used for recording brain signals:

1.Intracranial electrodes: These are electrodes that are implanted directly into brain tissue to record the electrical activity of individual neurons or small groups of neurons. They are typically used in research or clinical settings to study specific brain functions or to diagnose and treat conditions such as epilepsy.
Deep brain stimulation (DBS): This involves implanting electrodes in specific areas of the brain to deliver electrical stimulation that can help regulate abnormal brain activity. DBS is used primarily to treat movement disorders such as Parkinson's disease.

2.Intracranial pressure monitors: These devices are used to measure the pressure of the cerebrospinal fluid surrounding the brain, which can be an indicator of conditions such as hydrocephalus (excessive fluid in the brain).

3.Cerebral microdialysis: This technique involves placing a small probe into brain tissue to collect samples of the chemical substances that the brain produces or uses to communicate. These samples can provide information about the brain's metabolic activity and the levels of neurotransmitters and other signaling molecules.

Overall, invasive techniques for recording brain signals are more complex and risky than non-invasive techniques, and they require careful consideration of the potential benefits and risks. They are typically used in research or clinical settings to investigate specific brain functions or to diagnose and treat neurological conditions.