What Are the Kinds of EEG Examinations?
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An electroencephalogram (EEG) is a chronicling of brain activity. During
this painless test, small sensors are devoted to the scalp to pick up the
electrical signals fashioned by the brain. These signals are logged by a
machine made by EEG Machine Manufacturers
and are looked at by a doctor. The EEG procedure is typically carried out by a
highly trained specialist, named a medical neurophysiologist, during a short
hospital visit.
Why is an EEG Required?
An EEG can be used to help identify and screen several disorders
affecting the brain. It may help recognize the reason for certain indications –
such as seizures (fits) or memory glitches – or find out more about a disorder
you've already been identified with.
The main use of an EEG is to notice and examine epilepsy, a condition
that reasons recurrent seizures. An EEG will benefit your doctor recognize the
kind of epilepsy you have, what may be activating your seizures and how best to
treat you.
Less often, an EEG may be used to examine other glitches, such as:
dementia
head wound and concussion
brain cancers
encephalitis (brain irritation)
sleep complaints, such as sleep apnoea.
How is the test done?
There are numerous different ways EEG detailing can be taken. The medical
neurophysiologist will elucidate the procedure to you and can answer any
questions you have. You'll also be asked whether you accord to treatment for
the numerous parts of the examination to be carried out. This may comprise
video agreement for some EEGs. Before the examination starts, your scalp will
be gutted and about 20 small sensors called electrodes will be attached using a
special adhesive or paste. These are linked by wires to an EEG recording
machine made by EEG Manufacturers.
Routine EEG recordings typically take 20 to 40 minutes, although an
archetypal appointment will last about an hour, counting some preparation time
at the beginning and some time in the end.
Kinds of EEG
Regular EEG
A Regular EEG recording lasts for about 20 to 40 minutes. During the
examination, you'll be requested to rest silently. You will typically be
requested to open or close your eyes from time to time. In most circumstances,
you'll also be requested to respire in and out deeply (named hyperventilation)
for a few minutes. A blinking light may also be used to see if this disturbs
your brain activity.
Sleep EEG or sleep-deprived EEG
A slumber EEG is carried out while you're sleeping. It may be used if a
regular EEG does not give enough evidence, or for trial for sleep complaints.
In some cases, you may be requested to stay wide awake the night before the
examination to help safeguard you can snooze while it's carried out. This is
named a sleep-deprived EEG.
Ambulatory EEG
An ambulatory EEG is where brain activity is logged throughout the day
and night over one or more days. The electrodes will be devoted to a minor
portable EEG recorder that can be trimmed onto your clothing. You can endure
most of your regular daily activities while the footage is being taken,
although you'll need to evade getting the equipment wet.
Video telemetry
Video telemetry, also named video EEG, is a superior kind of EEG where
you're recorded while an EEG recording is taken. This can help offer more
evidence about your brain activity. The examination is typically carried out
over a few days while remaining in a purpose-built hospital complement. The EEG
signals are conveyed wirelessly to a computer. The video is also logged by the
computer and kept under steady investigation by trained staff.
Invasive EEG-telemetry
This EEG is not shared, but it may be used to check if surgery is likely
for some people with more intricate epilepsy. It includes surgery to position
electrodes straight on the brain to find out precisely where the seizures are
coming from.
What occurs after an EEG?
When the examination is ended, the electrodes will be detached and your
scalp will be gutted. Your hair will probably still be a bit tacky and
disordered afterward, so you may want to wash it when you get home. You can
typically go home soon after the examination is over and return to your normal
activities. You might feel weary after the examination, mainly if you had a
sleep or sleep-deprived EEG, so you may want somebody to pick you up from the
hospital. You usually will not get your consequences on the same day. The
recordings will need to be examined first and will be referred to the doctor
who entreated the test. They can deliberate the consequences with you a few
days or weeks later.
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