EEG Abnormal Waveforms - StatPearls - NCBI Bookshelf
2023年5月1日 · Abnormal waveforms seen on an electroencephalogram (EEG) recording include epileptiform and non-epileptiform abnormalities. In order to identify abnormal waveforms indicative of disease on an EEG, the reader should have a basic understanding of the normal EEG pattern in various physiological states in children and adults.
The Abnormal EEG - Electroencephalography (EEG): An …
Focal slow wave activity on the EEG is indicative of focal cerebral pathology of the underlying brain region. Slowing may be intermittent or persistent, with more persistent or consistently slower activity generally indicating more severe underlying focal cerebral dysfunction. A variety of etiologies for focal cerebral dysfunction may be seen.
Slowing and other Non-Epileptiform Abnormalities - Learning EEG
Outside of classic epileptiform activity, EEG can show a broad array of abnormalities due to underlying focal or generalized cerebral dysfunction. Most common among these is slowing, such as from a tumor or bleed. Slowing is categorized in several ways, including generalized vs focal, continuous vs intermittent, and polymorphic vs monomorphic ...
DOES NOT MEAN THE PATIENT IS ACTUALLY SEIZING DURING THE EEG! The duration of the abnormal wave is 70 microvolts or less. Stands out from the background. On Bipolar Montage, needs to have phase reversa l to b e real . Per Guru Dr. Shah, “If it looks like you would sit on it and it would hurt, it’s probably a spike”. Stands out from background. 2.
The Normal Awake EEG - Learning EEG
This is a normal awake tracing with a PDR of 9 Hz. The key to any EEG interpretation is a consistent approach. Look for a good anterior-posterior gradient, which this tracing shows with faster, lower amplitude beta activity in the frontal regions and slower, higher amplitude alpha activity in the occipital regions.
Epileptiform Electroencephalographic Patterns - Mayo Clinic …
Epileptiform abnormalities in the EEG tracing may be focal or generalized. The main types of focal epileptiform discharges arise from the temporal, frontal, occipital, centroparietal, centrotemporal, and midline regions of the brain.
may I best answer it with my EEG interpretation?-Is this record normal or abnormal?-If abnormal, is the abnormality focal or generalized?-Is the abnormality suggestive of seizures or an alternative diagnosis (eg, encephalopathy)?-Is the abnormality persistent, intermittent or rhythmic? Pitfalls in Interpreting Scalp EEG • Misread/over read
How to Read an EEG - Epilepsy Foundation
Being able to locate the origin of electrical activity ("localization") is critical to being able to interpret the EEG tracings meaningfully. Localizing normal or abnormal brain waves in bipolar montages is usually accomplished by identifying "phase reversal," a deflection of the two channels within a chain pointing to opposite directions.
EEG Abnormal Waveforms - PubMed
2023年5月1日 · Abnormal waveforms seen in an EEG recording include epileptiform and non-epileptiform abnormalities. In order to identify abnormal waveforms in EEG, the reader should have a basic understanding of the normal EEG pattern in …
Overcoming traps and pitfalls leading to misinterpretation of …
2024年5月18日 · Normal EEG variants appear monomorphic often appearing intermittently throughout the EEG tracing. They remain localized in the same brain region, and their morphology is stable repeating the same pattern throughout the entire EEG recording and often appearing in subsequent EEGs.