Electroencephalogram record movement in your mind
Electroencephalogram
Electroencephalogram examination is one of the methods of examining the function of the nervous system. It has important auxiliary diagnostic value for various neurological diseases such as headaches, brain tumors, and brain trauma. An electroencephalogram is a method that uses instruments to record the electrical activity of the body. The activity of nerve cells in the human brain can produce continuous rhythmic potential changes, which will produce brain waves. An electroencephalogram test involves attaching metal electrodes to the scalp. The electrodes are connected to wires, and processed by precision instruments, the brain waves are eventually transformed into waveforms that can be seen on a computer. This recorded undulating curve waveform is the electroencephalogram.
There are many types of EEG, mainly including: conventional EEG, dynamic EEG, video EEG, stereotactic EEG, etc. EEG can be divided into scalp electrode EEG and intracranial electrode EEG according to whether the electrodes are placed intracranially or extracranally. This guide mainly introduces scalp electrode EEG that is often encountered in clinical practice.
EEG uses instruments to record electrical activity, and the EEG signal passes through an amplifier (because the EEG signal is very weak, at the mV or uV level, and must be attenuated by the skull and scalp, it requires millions of times of amplification before it can be displayed) ), filter (reduce interference) and finally form the graph we see.
EEG detection objects
① Epilepsy
②Coma
③Sleep disorder
④Patients with meningitis/encephalitis
⑤ Creutzfeldt-Jakob disease
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⑥Patients with headache and dizziness
EEG is a non-radiative, painless and non-invasive brain function test that does not impose any external interference on the brain.
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