What are the different types of EEG electrodes?

Electroencephalogram (EEG) are located around the head area to collect electrical pulses from the brain and direct them to the type of machine used as a diagnostic tool for brain activity analysis. This measurement of brain activity is recorded by the technique known as encephalography. EEG electrodes are produced in several types, including disposable electrodes, repeatedly usable electrodes, headbands or caps and electrodes of needles. These electrodes are connected by their rupture to the "lead" or wire cable that connects to the recording machine. There are many relatively cheap varieties that are usually shaped as a flexible disk that is sticky and contains a central blow made of silver silver chloride. Some contain a semiliquid gel around the Snap area to allow it to better perform impulses on the machine's management. They have a disadvantage that they have a relatively large size and reduced ability to stick in regions with lots of hair. Some disposable electrodes useInstead of gel salt water - or physiological solution - and are anchored by cracking or cropping into a headband or cap.

repeatedly usable EEG electrodes are not as large as one -off, which gives them the advantage of being able to approach a lot of hair in areas with a lot of hair. Discs can be made of gold, silver or tin because all these behavior easily easily. They are used with headbands or caps and must be carefully cleaned after each use. They are initially more expensive than one -off electrodes, but this price tends to equalize over time because they are quite durable.

EEG electrodes for disposable or repeated EEG can be connected to closures or headbands by capturing or trimming on the location of sensors built into the closures. Cup in the shape or delectrodes in the shape of ISK are common types. Electrode closures are usually used whenA large amount of electrodes is required, for example when using biofeedback machines and neurofeedback machines. Caps or head wraps are also used with outpatient EEG-utilized for monitoring epileptic activity-the monitoring time extended for several days in conjunction with electrodes anchored gel and a portable computer to which the line is connected.

Another form of electrode is in the form of a needle that pierces the skin called a subdermal needle. These EEG electrodes can be one -off or reopen. They are relatively expensive and are mainly used as diagnostic aids during surgery.