What is an EEG amplifier?

Electroencephalography (EEG) is a measurement of electrical activity in the brain. Measurements and graphical representations are recorded through electrodes that are located on the scalp. Electrical activity in the brain passes through electrodes connected to the EEG amplifier. The signals in the brain have a low amplitude, so the EEG amplifier is used to "amplify" brain activity and visibility. The activity of the brain is then recorded using the EEG amplifier and graphically represents in the form of waves also known as brain waves. These electrodes are conductors that are placed along the surface thoroughly cleaned scalp. They allow them to go through electrical activity and by placing numerous electrodes on the scalp electrical activity in different areas of technicians can be recorded simultaneously. The electrodes are connected by a cable to the EEG amplifier, such as printing, and this machine records physiological changes that occur in different areas of the brain.

EEG recording can be monopolar or bipolar. The monopolar record occurs when the individual electrode measures brain activity compared to the indifferent and remotely placed electrode, while the bipolar recording measures brain activity between a pair of electrodes. The measurement occurs in the form of waves and consists of different frequencies. These frequencies are grouped as falling into alpha (8 -13 Hertz), beta (13-30 Hertz), Delta (0.5-2 Hertz) or Theta (4-7 Hertz). EEG amplifier allows you to record brain waves, which often results in specific progress that are characteristic of certain behavior; For example, when the individual is relaxed, alpha activity is usually recorded.

EEG was implemented for recording brain activity during different behavior. They were used to record brain activity during sleep and were also used to measure epileptic activity such as seizures. Epilepsy is a state characterized by recurring seizures that jare either partial or generalized. Partial seizures occur in one hemisphere of the brain from a particular area, while generalized seizures begin in different areas and result in loss of consciousness. EEG records help to distinguish whether seizures are either partial or generalized by a significant change in brain activity that occurs during epileptic activity.