Regional coherence and the transfer of ictal activity during seizure onset in the medial temporal lobe
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Epilepsy as a manifestation of a multistate network of oscillatory systems
2019, Neurobiology of DiseaseCitation Excerpt :These activities are compatible with the behaviour of coupled neuronal network oscillators. Duckrow and Spencer (1992), analyzed intracranial recordings from hippocampal depth electrodes implanted in epilepsy patients being evaluated for possible resective surgery, measuring regional coherence and the transfer of ictal activity. They concluded that “the process of neuronal entrainment during seizure onset involves a transient interaction between brain regions, but the maintenance of this interaction is not required for sustained seizure activity”.
The role of sub-hippocampal versus hippocampal regions in bitemporal lobe epilepsies
2016, Clinical NeurophysiologyDiscriminating preictal and interictal brain states in intracranial EEG by sample entropy and extreme learning machine
2016, Journal of Neuroscience MethodsCortical connectivity in fronto-temporal focal epilepsy from EEG analysis: A study via graph theory
2015, Clinical NeurophysiologyCitation Excerpt :Within this theoretical framework, focal epilepsy is increasingly seen as a ‘network disorder’ (Kramer and Cash, 2012; Richardson, 2012; Engel et al., 2013). During the genesis of partial seizures (particularly temporal lobe seizures), it has been observed that the EEG rhythms from involved brain networks are characterized by increased synchronization culminating at the end with a clinical seizure (Lieb et al., 1987; Duckrow and Spencer, 1992; Gotman and Levtova, 1996; Le Van et al., 1998; Bartolomei et al., 2001, 2004, 2005; Schindler et al., 2007). In contrast, few studies have investigated network properties and functioning during the interictal period.
Interictal network properties in mesial temporal lobe epilepsy: A graph theoretical study from intracerebral recordings
2013, Clinical NeurophysiologyCitation Excerpt :In epilepsy, studies have focused on the characterization of seizure generation and network changes in patient with drug-resistant partial seizures. During the genesis of partial seizures (in particular temporal lobe seizures), it has been observed that involved brain networks are characterized by increased synchronization culminating at the end of the seizure (Gotman and Levtova, 1996, Duckrow and Spencer, 1992; Lieb et al., 1987; Le Van Quyen et al., 1998; Bartolomei et al., 2001, 2004, 2005, 1999; Schindler et al., 2007). In contrast, few studies have investigated network properties and functioning during the interictal period.
Discriminating preictal and interictal states in patients with temporal lobe epilepsy using wavelet analysis of intracerebral EEG
2012, Clinical NeurophysiologyCitation Excerpt :Early work (Viglione and Walsh, 1975) showed a gradual change of EEG patterns in the minutes before seizure onset in a few samples. Further studies were carried out mainly with spectral analysis in an attempt to identify seizure precursors (Wieser and Preictal, 1989; Duckrow and Spencer, 1992; Osorio et al., 1998; Salant et al., 1998). Characteristic changes were found in the seconds preceding onset.