how works EEG machine?

Answer 1

An EEG machine is a device that measures the electrical activity in the brain. The electrical signals that come from the brain can help the doctor identify what is wrong with the brain. However, the EEG machine only measures electrical activity in the brain. There is much about brain function that cannot be measured by the EEG. The EEG machine may either be a separate piece of equipment or available in the bedside monitor. The EEG machine obtains its measurements through wires, called leads, connected to sensors (EEG pads) placed on a patient's head.

An EEG machine is used when the doctor wants to monitor the electrical activity in the brain. This machine is used when the doctor wants to see if the brain is functioning normally and to monitor therapies that affect the brain.

Answer 2

lectroencephalography is the neurophysiologic measurement of the electrical activity of the brain by recording from electrodes placed on the scalp or, in special cases, subdurally or in the cerebral cortex. The resulting traces are known as an electroencephalogram (EEG) and represent an electrical signal (postsynaptic potentials) from a large number of neurons. These are sometimes called brainwaves, though this use is discouraged [1]. The EEG is a brain function test, but in clinical use it is a "gross correlate of brain activity" [2]. Electrical currents are not measured, but rather voltage differences between different parts of the brain.

EEGs are frequently used in experimentation because the process is non-invasive to the research subject. The subject does not need to make a decision or behavioral action in order to log data, and it can detect covert responses to stimuli, such as reading. The EEG is capable of detecting changes in electrical activity in the brain on a millisecond-level. It is one of the few techniques available that has such high temporal resolution. The other common technique is MEG.

Answer 3

EEG stands for electroencephalography. The definition gives most of it away. EEG reads and records the electrical activity within the brain. This is done by placing a cap on the patients head, the cap usually contains 32 electrodes which can read the electrical signals formed by the nervous system. Each electrode detects activity in a certain region leading to possible diagnosis or location of a possible disorder or disease.