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Therefore, MEG is more sensitive to superficial cortical activity, which makes it useful for the study of neocortical epilepsy. Finally, MEG is reference-free, while scalp EEG relies on a reference that, when active, makes interpretation of the data difficult.
The clinical value of these findings is the subject of ongoing investigations, but recent researches suggest an acceptable reliability for EEG-fMRI studies and better sensitivity in higher field scanner. [5] Outside the field of epilepsy, EEG-fMRI has been used to study event-related (triggered by external stimuli) brain responses and provided ...
Epilepsy is currently ranked as the third most commonly diagnosed neurological disorder, afflicting approximately 2.5 million people in the United States alone. [13] Epileptic seizures are chronic and unrelated to any immediately treatable causes, such as toxins or infectious diseases, and may vary widely based on etiology, clinical symptoms ...
SPECT scan using Isoflupane labeled with I-123 (also called DaT scan) is useful in differentiating Parkinson's disease from other causes of tremor. [19] SPECT scan is also used in evaluation of drug resistant epilepsy. This uses Tc 99 labeled hexamethyl-propylene amine oxime (Tc 99 HMPAO) or ethyl cysteinate dimer ( Tc 99 ECD) as the tracers ...
The pre-surgical evaluation for epilepsy is designed to locate the "epileptic focus" or the "epileptogenic zone" (the location where the epilepsy originates in the brain) and to determine if/how surgery could affect normal brain function. [8]
Lennox–Gastaut syndrome (LGS) is a complex, rare, and severe childhood-onset epilepsy syndrome. It is characterized by multiple and concurrent seizure types including tonic seizure, cognitive dysfunction, and slow spike waves on electroencephalogram (EEG), which are very abnormal. [1]