Temporal changes of neocortical high-frequency oscillations in epilepsy
نویسندگان
چکیده
منابع مشابه
Temporal changes of neocortical high-frequency oscillations in epilepsy.
High-frequency (100-500 Hz) oscillations (HFOs) recorded from intracranial electrodes are a potential biomarker for epileptogenic brain. HFOs are commonly categorized as ripples (100-250 Hz) or fast ripples (250-500 Hz), and a third class of mixed frequency events has also been identified. We hypothesize that temporal changes in HFOs may identify periods of increased the likelihood of seizure o...
متن کاملData mining neocortical high-frequency oscillations in epilepsy and controls.
Transient high-frequency (100-500 Hz) oscillations of the local field potential have been studied extensively in human mesial temporal lobe. Previous studies report that both ripple (100-250 Hz) and fast ripple (250-500 Hz) oscillations are increased in the seizure-onset zone of patients with mesial temporal lobe epilepsy. Comparatively little is known, however, about their spatial distribution...
متن کاملHigh-frequency oscillations and seizure generation in neocortical epilepsy.
Neocortical seizures are often poorly localized, explosive and widespread at onset, making them poorly amenable to epilepsy surgery in the absence of associated focal brain lesions. We describe, for the first time in an unselected group of patients with neocortical epilepsy, the finding that high-frequency (60-100 Hz) epileptiform oscillations are highly localized in the seizure onset zone, bot...
متن کاملSpatial localization and time-dependant changes of electrographic high frequency oscillations in human temporal lobe epilepsy.
PURPOSE High frequency oscillations (HFOs) >200 Hz are believed to be associated with epileptic processes. The spatial distribution of HFOs and their evolution over time leading up to seizure onset is unknown. Also, recording HFOs through conventional intracranial electrodes is not well established. We therefore wished to determine whether HFOs could be recorded using commercially available dep...
متن کاملUnsupervised classification of high-frequency oscillations in human neocortical epilepsy and control patients.
High-frequency oscillations (HFOs) have been observed in animal and human intracranial recordings during both normal and aberrant brain states. It has been proposed that the relationship between subclasses of these oscillations can be used to identify epileptic brain. Studies of HFOs in epilepsy have been hampered by selection bias arising primarily out of the need to reduce the volume of data ...
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ژورنال
عنوان ژورنال: Journal of Neurophysiology
سال: 2013
ISSN: 0022-3077,1522-1598
DOI: 10.1152/jn.01009.2012