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Services / Nuero Physiology / EEG

EEG (Electroencephalogram)

NEURO PHYSIOLOGYinvestigations are done on 32 Channel Digital Video Recordingmachine from RMS Company.

EEG or electroencephalogram, is a tool used to image the brain while it is performing a cognitive task.

EEG test has a role in assessing brain activity in many conditions or procedures, such as:

  • Epilepsy
  • Memory disorders such as Alzheimer’s disease
  • Sleep disorders
  • Brain surgery or inflammation
  • Unconsciousness
  • Brain death in coma patients
  • Tumors
  • Shivering
Electroencephalography test at City Xray

Precaution & Preparation

  • Patient should not consume caffeine before the EEG test.
  • Patient should avoid using oil, hair styling products (hairspray or gel) on the day of the exam.
  • It is mandatory to bring one attendant for the investigation of EEG.

It is reported by trained Neurologist. When examining the recordings, the neurologist looks for certain patterns that represent problems in a particular area of the brain. For example, certain types of seizures have specific brain wave patterns that the trained neurologist recognizes. Likewise, a normal brain has a specific brain wave pattern that the trained neurologist recognizes. The neurologist looks at all recorded tracings, decides what is normal and what is not, and determine what the abnormal tracings represent.

Frequently Asked Questions

EEG results show changes in brain activity that may be useful in diagnosing brain conditions, especially epilepsy and other seizure disorders. An electroencephalogram (EEG) is a test that detects electrical activity in your brain using small, metal discs (electrodes) attached to your scalp.
Abnormal EEG results can show up in two ways. First, normal brain activity may be suddenly interrupted and changed. This happens in epileptic seizures. In partial seizures, only part of the brain shows the sudden interruption.
Most EEGs are done to diagnose and monitor seizure disorders. EEGs also can identify causes of other problems, such as sleep disorders and changes in behavior. They're sometimes used to evaluate brain activity after a severe head injury or before a heart transplant or liver transplant.
Having an EEG is not painful. It may be slightly uncomfortable having the electrodes attached, but the electrodes do not produce any sensation — they only record your brain's activity.
EEG is a safe test with no side effects. However, a person with epilepsy may experience a seizure, triggered by the various stimuli used in the procedure, including the flashing lights.
A normal EEG does not mean that you did not have a seizure. Approximately one-half of all EEGs done for patients with seizures are interpreted as normal. Even someone who has seizures every week can have a normal EEG test. This is because the EEG only shows brain activity during the time of the test.
An electroencephalogram (EEG) is a noninvasive test that records electrical patterns in your brain. The test is used to help diagnose conditions such as seizures, epilepsy, head injuries, dizziness, headaches, brain tumors and sleeping problems. It can also be used to confirm brain death.
EEG can diagnose the two most common types of dementia (i.e., AD and VaD) because both of these types are cortical, and EEG reflects hidden brain abnormalities.
This study is generally done by an EEG technician and may take approximately 45 minutes to 2 hours. If you are being evaluated for a sleep disorder, the EEG may be done while you are asleep.
One of the big disadvantages of EEG/ERP is that it's hard to figure out where in the brain the electrical activity is coming from. By putting lots of electrodes all over the scalp (in our lab we use 64 or 128 electrodes), we can get some idea of where the ERP components are strongest.
Your scalp will not be shaved, but the area under the electrodes will be cleaned to remove any excess oils from your scalp. A special gel or paste helps the electrodes pick up your brain waves more efficiently.
You will be closely monitored and medical professionals will be there to help if you do have a seizure. Your doctor might ask you to have less sleep than usual before you have some types of EEG tests. This is done to increase the chances of catching abnormal activity during the test.
Do not eat or drink anything with caffeine in it for 12 hours before the test. This includes cola, energy drinks, and chocolate. Shampoo your hair and rinse with clear water the evening before or the morning of the test. Do not put any hair conditioner or oil on after you wash your hair.
You should wear comfortable clothing while your ambulatory EEG is being performed. Sweat pants and a loose fitting top with buttons down the front are suggested. Tight fitting sleeves and pull over tops will not be permitted. Do not attempt to pull a shirt or other clothing over your head during the ambulatory EEG.
An electroencephalogram (EEG) is the recording of the brain electrical activity. A set of electrodes are placed on the scalp of the subject. This technique is non-invasive since no surgery is required. ... Moreover EEG is often contaminated with artefacts.
To record seizure activity, a longer EEG recording with times that you are both awake and asleep may be needed. When this test is done at home, it's called an ambulatory EEG.
EEG clearly is an imaging method as both magnetic resonance imaging (tomography) and electroencephalography graphically depict different dimensions of brain structure and function.


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