These four patterns have two basic properties which are examined by doctors and psychologists. There are four types of EEG patterns that can be noticed on a recording: alpha waves, beta waves, theta waves, and delta waves. The electrical impulses in an EEG recording have the appearance of wavy lines with peaks and valleys. Brain damage as a result of a head injury.As an EEG can determine changes in brain activity, this is a useful method for diagnosing brain disorders.īelow are some of the conditions which can be detecting and measured from an EEG: These electrical impulses are displayed as wavy lines on an EEG recording.Ī doctor may advise the use of an EEG to be able to diagnose several conditions. This is how neurons pass messages to each other in order for behaviors, thought, and other conscious or unconscious processes to occur.ĮEGs record the electrical activity for a period of time to be able to indicate the level of activity in the brain. The electrical activity in the brain is known as action potential, or nerve impulses. The electrodes of the EEG analyze the electrical impulses that are being communicated in the brain, which then gets transmitted to a computer which monitors the results. EEG is used to show the presence or absence of specific brain activity in specific areas of the brain, with an accuracy within milliseconds.
The recording shows the electrical activity from small areas of the brain. The electrodes cannot pick up signals for individual neurons. The cells of the brain communicate to each other via electrical impulses, which are picked up by the EEG through small metal discs, called electrodes, which get attached to the scalp. German physiologist Hans Berger was known as the inventor of the EEG back in 1924 where he conducted the first EEG on a human. It produces a chart (an encephalogram) which shows how Which can detect and record minute changes in electrical activity within the brain. The electroencephalogram (EEG) is a neuroimaging test To find out more about the Electroneurodiagnostic Clinic of Carondelet Neurological Institute or to make a referral, please call (520) 873-3333.What is an EEG Test (Electroencephalogram)?īy Olivia Guy-Evans, published June 16, 2021 Problems and neuropathies, such as diabetic neuropathy. Patients who are candidates for EMG/NCV testing include those with carpal tunnel syndrome, ulnar nerve If indicated, muscle testing can be performed to evaluate muscle function in addition to nerve function. Over a nerve to determine nerve function. Nerve testing is performed by placing a recording electrode on the muscle of the limb involved and applying electrical stimulation at prescribed points Electromyography/Nerve Conduction Velocity (EMG/NCV) TestingĮMG/NCV testing evaluates the integrity of the peripheral nerve and the functioning of the nerve. Those that are in status epilepticus (when the brain is in a state of persistent seizure) or are having frequent seizures. Neurologists and neurosurgeons can remotely view the live EEG/video feed to keep a close watch on how you’re doing. Bedside MonitoringĬritically ill patients are EEG/video monitored within the Neurological Intensive Care Center. These systems are equipped with a seizure detection program that automatically marks an event that may be a seizure.
With both types of recording, you can use a push button to mark on the recording when an episode occurs. This testing can take place in the Neurodiagnostics Lab where you’ll be monitored for up to 12 hours on an outpatient basis.Īlternatively, you may be sent home with an ambulatory EEG that records results on a compact flash drive. If you have symptoms that are recurrent, despite having a normal EEG, you may benefit from a prolonged or ambulatory EEG.
It’s also used to identify organic causes of psychiatric conditions and disabilities in children and even to determine irreversible brain death. Doctors use EEG recordings to assist in the diagnosis of various neurologicalĬonditions, including headaches, dizziness, seizure disorders, strokes and degenerative brain disorders. We offer a wide range of electroneurodiagnostic services, including: Electroencephalography (EEG)Īn EEG records the electrical activity of the brain detected by electrodes that are placed on the scalp. The diagnostic services we offer gives crucial information on your health that can be used by your doctor or medical specialists to help inform treatment. Performed using advanced diagnostic equipment, our highly trained technologists work closely with neurologists and neurosurgeons who have specific training and experience in the field of neurosciences. EEGAt the Electroneurodiagnostic Clinic of Carondelet Neurological Institute, we specialize in performing diagnostic tests that provide information about your neurological function to help pinpoint the cause of your symptoms.