Long-term Evalution of Sychronization between Scalp Eeg Signals in Partial Epilepsy
نویسندگان
چکیده
For the anticipation of epileptic seizures synchronization between signals from intracranial recorded EEG has been studied. Here, we present our first findings for scalp EEG. For 3 epilepsy patients 85 hours of scalp EEG were analyzed. After determining the instantaneous phase with the Hilbert transform, the level of synchrony was calculated for all possible electrode pairs within 4 defined groups. This was done for 14 frequency bands of 2Hz between 1 and 50Hz. As well during sleep as in the awake state we found a particular behavior of the synchrony levels in the pathological hemisphere. Furthermore, we found a similar sleep-wake cycle for the two temporal lobe epilepsy patients, not seen in the case of the patient with extra temporal lobe epilepsy. These results show an altered brain dynamics for epilepsy patients, which can give information on the localization of the epilepsy.
منابع مشابه
From Intracerebral EEG Signals to Brain Connectivity: Identification of Epileptogenic Networks in Partial Epilepsy
Epilepsy is a complex neurological disorder characterized by recurring seizures. In 30% of patients, seizures are insufficiently reduced by anti-epileptic drugs. In the case where seizures originate from a relatively circumscribed region of the brain, epilepsy is said to be partial and surgery can be indicated. The success of epilepsy surgery depends on the accurate localization and delineation...
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