Sunday, 19 August 2018

An electroencephalogram (EEG) is a recording of brain activity

all through the check, small sensors are connected to the scalp to pick up the electrical indicators produced whilst mind cells send messages to each different.

these indicators are recorded through a gadget and are looked at by using a medical doctor later to peer if they may be uncommon.

The EEG manner is generally completed with the aid of a enormously skilled expert, known as a clinical neurophysiologist, throughout a brief visit to health center.

when an EEG is usedDuring the test, small sensors are attached to the scalp to pick up the electrical signals produced when brain cells send messages to each other.

These signals are recorded by a machine and are looked at by a doctor later to see if they're unusual.

The EEG procedure is usually carried out by a highly trained specialist, called a clinical neurophysiologist, during a short visit to hospital.

When an EEG is used
An EEG can be used to help diagnose and monitor a number of conditions affecting the brain.

It may help identify the cause of certain symptoms – such as seizures (fits) or memory problems – or find out more about a condition you've already been diagnosed with.

The main use of an EEG is to detect and investigate epilepsy, a condition that causes repeated seizures. An EEG will help your doctor identify the type of epilepsy you have, what may be triggering your seizures and how best to treat you.

Less often, an EEG may be used to investigate other problems, such as dementia, head injuries, brain tumours, encephalitis (brain inflammation) and sleep disorders, such as obstructive sleep apnoea.

Preparing for an EEG
Your appointment letter will mention anything you need to do to prepare for the test.

Unless told otherwise, you can usually eat and drink beforehand and continue to take all your normal medication.

To help the sensors stick to your scalp more easily, you should make sure your hair is clean and dry before arriving for your appointment, and avoid using products such as hair gel and wax.

You might want to bring a hairbrush or comb with you, as your hair may be a bit messy when the test is finished. Some people bring a hat to cover their hair until they can wash it at home afterwards.

How an EEG is carried out
There are several different ways an EEG recording can be taken. The clinical neurophysiologist will explain the procedure to you and can answer any questions you have.

You'll also be asked whether you give permission (consent) for the various parts of the test to be carried out.

Before the test starts, your scalp will be cleaned and about 20 small sensors called electrodes will be attached using a special glue or paste. These are connected by wires to an EEG recording machine.

A man having an EEG, with electrodes attached to his head
Routine EEG recordings usually take 20 to 40 minutes, although a typical appointment will last about an hour, including some preparation time at the beginning and some time at the end.

Other types of EEG recording may take longer.

Types of EEG
Routine EEG
A routine EEG recording lasts for about 20 to 40 minutes.

During the test, you'll be asked to rest quietly and open or close your eyes from time to time. In most cases, you'll also be asked to breathe in and out deeply (called hyperventilation) for a few minutes.

At the end of the procedure, a flashing light may be placed nearby to see if this affects your brain activity.

Sleep EEG or sleep-deprived EEG
A sleep EEG is carried out while you're asleep. It may be used if a routine EEG does not give enough information, or to test for sleep disorders.

In some cases, you may be asked to stay awake the night before the test to help ensure you can sleep while it's carried out. This is called a sleep-deprived EEG.

Ambulatory EEG
An ambulatory EEG is where brain activity is recorded throughout the day and night over a period of one or more days. The electrodes will be attached to a small portable EEG recorder that can be clipped onto your clothing.

You can continue with most of your normal daily activities while the recording is being taken, although you'll need to avoid getting the equipment wet.

Video telemetry
Video telemetry, also called video EEG, is a special type of EEG where you're filmed while an EEG recording is taken. This can help provide more information about your brain activity.

The test is usually carried out over a few days while staying in a purpose-built hospital suite.

The EEG signals are transmitted wirelessly to a computer. The video is also recorded by the computer and kept under regular surveillance by trained staff.

What happens after an EEG
When the test is finished, the electrodes will be removed and your scalp will be cleaned. Your hair will probably still be a bit sticky and messy afterwards, so you may want to wash it when you get home.

You can usually go home soon after the test is finished and return to your normal activities. You might feel tired after the test, particularly if you had a sleep or sleep-deprived EEG, so you may want someone to pick you up from hospital.

You normally will not get your results on the same day. The recordings will need to be analysed first and will be sent to the doctor who requested the test. They can discuss the results with you a few days or weeks later.

Are there any risks or side effects?
The EEG procedure is painless, comfortable and generally very safe. No electricity is put into your body while it's carried out. Apart from having messy hair and possibly feeling a bit tired, you normally will not experience any side effects.
An electrolyte test can help determine whether there's an electrolyte imbalance in the body.

Electrolytes are salts and minerals, such as sodium, potassium, chloride and bicarbonate, which are found in the blood. They can conduct electrical impulses in the body.

The test is sometimes carried out during a routine physical examination, or it may be used as part of a more comprehensive set of tests.

For example, your electrolyte level may be checked if you're prescribed certain medications, such as diuretics or angiotensin-converting enzyme (ACE) inhibitors, which are often used to treat high blood pressure.

As well as checking levels of electrolytes in the blood, an electrolyte panel (a group of specific blood tests) can also be used to find out whether there's an acid-base imbalance (a normal arterial blood pH range is 7.35 to 7.45).

An electrolyte test can also be used to monitor the effectiveness of treatment for an imbalance that affects the functioning of an organ.

Treatment for an electrolyte imbalance will depend on which electrolyte is out of balance and by how much. For example, if you have a sodium imbalance you may be advised to lower your salt intake (if sodium is too high) or reduce your fluid intake (if sodium is too low).


However, you may feel lightheaded and notice a tingling in your lips and fingers for a few minutes during the hyperventilation part of the test. Some people develop a mild rash where the electrodes were attached.

If you have epilepsy, there's a very small risk you could have a seizure while the test is carried out, but you'll be closely monitored and help will be on hand in case this happens.


An EEG may be used to help diagnose and monitor some of conditions affecting the brain.

it could help become aware of the purpose of sure signs and symptoms – together with seizures (fits) or memory issues – or discover greater about a condition you have already been recognized with.

the principle use of an EEG is to hit upon and inspect epilepsy, a condition that causes repeated seizures. An EEG will help your health practitioner discover the kind of epilepsy you have got, what can be triggering your seizures and how fine to treat you.

much less frequently, an EEG can be used to analyze different troubles, consisting of dementia, head injuries, mind tumours, encephalitis (brain irritation) and sleep issues, consisting of obstructive sleep apnoea.

getting ready for an EEG
Your appointment letter will point out some thing you need to do to prepare for the take a look at.

except informed otherwise, you may normally consume and drink beforehand and continue to take all of your everyday medicinal drug.

To help the sensors persist with your scalp extra without difficulty, you should make certain your hair is smooth and dry before arriving on your appointment, and keep away from using merchandise such as hair gel and wax.

you might need to carry a hairbrush or comb with you, as your hair can be a bit messy whilst the check is finished. some human beings carry a hat to cowl their hair until they can wash it at home afterwards.

How an EEG is performed
There are numerous exceptional methods an EEG recording may be taken. The scientific neurophysiologist will explain the system to you and can solution any questions you have.

you will also be asked whether you give permission (consent) for the diverse parts of the test to be carried out.

earlier than the check starts offevolved, your scalp could be wiped clean and about 20 small sensors known as electrodes will be connected using a special glue or paste. those are related via wires to an EEG recording machine.

a man having an EEG, with electrodes attached to his head
ordinary EEG recordings usually take 20 to 40 minutes, despite the fact that an ordinary appointment will last approximately an hour, inclusive of some instruction time at the beginning and a while at the quit.

other varieties of EEG recording may additionally take longer.

forms of EEG
habitual EEG
A recurring EEG recording lasts for about 20 to 40 minutes.

at some point of the take a look at, you may be asked to rest quietly and open or near your eyes occasionally. In most instances, you will additionally be asked to respire in and out deeply (called hyperventilation) for a few minutes.

on the cease of the technique, a flashing mild can be placed close by to peer if this affects your brain interest.

Sleep EEG or sleep-disadvantaged EEG
a sleep EEG is finished even as you're asleep. it could be used if a routine EEG does no longer supply enough records, or to test for sleep issues.

In a few cases, you may be requested to stay wide awake the night time before the test to assist make sure you can sleep even as it is completed. this is called a snooze-disadvantaged EEG.

Ambulatory EEG
An ambulatory EEG is in which brain pastime is recorded in the course of the day and night time over a length of one or more days. The electrodes might be attached to a small portable EEG recorder that may be clipped onto your garb.

you may maintain with most of your regular day by day sports whilst the recording is being taken, despite the fact that you may want to keep away from getting the gadget wet.

Video telemetry
Video telemetry, also referred to as video EEG, is a unique form of EEG where you are filmed at the same time as an EEG recording is taken. this could assist provide greater data approximately your brain hobby.

The check is normally achieved over a few days at the same time as staying in a cause-built medical institution suite.

The EEG signals are transmitted wirelessly to a laptop. The video is also recorded via the computer and kept beneath everyday surveillance through trained workforce.

What happens after an EEG
when the test is completed, the electrodes can be removed and your scalp can be cleaned. Your hair will possibly nonetheless be a bit sticky and messy afterwards, so you might also want to scrub it when you get home.

you can commonly cross domestic quickly after the check is finished and go back in your regular activities. you may sense worn-out after the test, in particular if you had a nap or sleep-deprived EEG, so that you may additionally need someone to pick you up from health facility.

You commonly will now not get your outcomes on the identical day. The recordings will want to be analysed first and might be despatched to the doctor who requested the take a look at. they are able to talk the effects with you some days or even weeks later.

Are there any dangers or facet consequences?
The EEG procedure is painless, cozy and commonly very secure. No electricity is put into your body whilst it is performed. other than having messy hair and possibly feeling a bit tired, you generally will not experience any facet consequences.
An electrolyte test can help determine whether or not there is an electrolyte imbalance in the body.

Electrolytes are salts and minerals, consisting of sodium, potassium, chloride and bicarbonate, that are located in the blood. they can conduct electric impulses in the body.

The take a look at is from time to time done all through a recurring physical exam, or it is able to be used as a part of a extra comprehensive set of checks.

for instance, your electrolyte stage can be checked if you're prescribed certain medications, such as diuretics or angiotensin-converting enzyme (ACE) inhibitors, which can be often used to deal with high blood stress.

in addition to checking degrees of electrolytes inside the blood, an electrolyte panel (a group of particular blood tests) also can be used to discover whether there is an acid-base imbalance (a normal arterial blood pH range is 7.35 to 7.45).

An electrolyte test also can be used to reveal the effectiveness of remedy for an imbalance that affects the functioning of an organ.

treatment for an electrolyte imbalance will depend on which electrolyte is out of balance and by how a whole lot. for instance, if you have a sodium imbalance you may be counseled to decrease your salt intake (if sodium is just too excessive) or lessen your fluid consumption (if sodium is just too low).


but, you may sense lightheaded and notice a tingling in your lips and palms for a few minutes for the duration of the hyperventilation a part of the check. some humans broaden a slight rash in which the electrodes had been attached.

if you have epilepsy, there's a very small danger you can have a seizure while the take a look at is executed, but you may be intently monitored and help will be accessible in case this occurs.

1 comment:

  1. Thanks for sharing this article here about the electroencephalogram. your article is very informative and I will share it with my other friends as the information is really very useful. Keep sharing your excellent work. Acaweb provides you the best Cost of MRI in Miami.

    ReplyDelete