What is EEG?

EEG, also called electroencephalography or electroencephalogram, is a test that detects the electrical activity of the brain or brain wool. Doctors often use a test to evaluate head injuries or to diagnose neurological disorders. Depending on the reason EEG, the patient may be up or sleeping during the test. Patients may have to pursue anywhere from one to four hours to test the doctor's office or hospital. The electrodes are connected to the wires that are connected to the recording device and amplifier. The amplifier connects to the computer monitor, so a neurologist can interpret the test results. Electrodes help to detect any electrical activity generated from the patient's brain cells. A variety of wave rhythms during EEG - Alfa, Beta, Delta and Theta. They are used by neurologists to explore how the brain works or reacts while the person sleeps or remains up to 30 minutes. The patient is tested with activity at each stage, from seating to reaction to svÚS or other stimuli and sudden explosions of energy.

Each type of wave is recorded at a different speed and indicates something else in relation to the patient's brain patterns. Alpha waves that record up to 12 cycles per second indicate when the patient is awake, but with eyes closed. Beta Waves, recorded in a pattern of up to 30 cycles per second, records the reaction of the brain to sedative drugs. Doctors usually examine Delta waves in children or during a deep patient's sleep because they are the shortest explosions of activity from 0.5 to 3.5 cycles per second. Theta Wave is most commonly examined in children and young adults and recorded up to 7 cycles per second.

neurologists often administer electrical activities to children and adults to diagnose head trauma, brain disease or sleep disorders. Patients with brain damage in an accident may undergo EEG so that doctors can evaluate changes in the brain. ExamIt can also be used to detect brain tumor or brain disease such as encephalitis. Electrical activity from the test most often detects the presence of epilepsy or other seizure disorders in patients. Alzheimer's disease or narcolepsy can also be diagnosed with the help of EEG.

Preparation for the Electroencephalography Test usually varies depending on the patient's condition. The hair should be washed with just shampoo at night before the test, because the scalp would be placed electrodes. The patient should avoid the use of conditioners or other hair products as it may interfere with the test results. Doctor may ask the patient to stop taking medication or avoid any caffeine food and drinks for several hours. Fasting is forbidden before the test, as the results can be chamfighted with low blood sugar levels.

Instructions may be listed about the sleep plan that is specific to each patient. For example, a patient may be instructed to reduce the sleep last nightEC if it is obliged to sleep during the EEG. In the doctoral office or in the hospital room, the patient may lie in bed or inclination on a chair with up to 25 electrodes placed on his head. Proper procedures require the patient to remain calm and relaxed with eyes closed, even if it can be awake. EEG results can be available several hours after the test.