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Electroencephalographic Features (electroencephalographic + feature)

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Medical Sciences100%

Selected Abstracts

Focal Semiologic and Electroencephalographic Features in Patients with Juvenile Myoclonic Epilepsy

EPILEPSIA, Issue 10 2005
Naotaka Usui
Summary:,Purpose: A few reports have described focal electroencephalographic or clinical features or both of juvenile myoclonic epilepsy (JME), but without video-EEG documentation. We examined focal clinical and EEG features in patients with JME who underwent video-EEG monitoring. Methods: Twenty-six patients (nine males and 17 females) who had seizures recorded during video-EEG monitoring were included. Age at seizure onset was 0 to 22 years (mean, 12.3 years), and age at monitoring was 12 to 44 years (mean, 26.5 years). In one patient with left parietooccipital epilepsy, primary generalized tonic,clonic seizures developed after resection of the parietal tumor. Two patients had both temporal lobe epilepsy and JME. Videotaped seizures in each patient were analyzed. Interictal and ictal EEG also were analyzed for any focal features. Results: Focal semiologic features were observed in 12 (46%) of 26 patients. Six patients had focal myoclonic seizures, and two had Figure 4 sign: one with version to the left, and another had left version followed by Figure 4 sign, and left arm clonic seizure. Their ictal EEGs were generalized at onset but with a lateralized evolution over the right hemisphere. The patient who had both JME and left parietooccipital epilepsy, right arm clonic seizure, and Figure 4 sign was seen during a generalized EEG seizure. Interictally, one patient had temporal sharp waves, and another had run of spikes in the right frontal region. Conclusions: Fourteen (54%) of 26 patients with JME exhibited focal semiologic or electroencephalographic features or both. Video-EEG was essential in reaching a correct diagnosis and choosing an appropriate antiepileptic drug regimen. [source]

Ictal Spitting: Clinical and Electroencephalographic Features

EPILEPSIA, Issue 8 2003
Christoph Kellinghaus
Summary: Purpose: To identify clinical and EEG correlates of ictal spitting automatisms and to assess their reliability in indicating the hemisphere of seizure onset. Methods: The epilepsy-monitoring database (1994,2002) of the Cleveland Clinic Foundation (CCF) was searched for patients with a definite history of ictal spitting. All available documents of the patients, particularly their original video and EEG data, were reviewed. Results: Twelve (0.3%) of the ,4,000 patients had a documented history of ictal spitting. In seven of them, 15 seizures with spitting automatisms were recorded. All of them started with an aura or arousal out of sleep. In six of the seven patients (12 of 15 seizures), EEG onset was clearly lateralized to the right, nondominant hemisphere. Spitting occurred at a median time of 21 s after EEG seizure onset. At that time, predominantly fast, high-amplitude theta (5,7 Hz) was seen in the hemisphere of seizure onset, maximum temporal. In all but one of the total 12 patients, the epileptogenic zone was in the temporal lobe. In nine of the 12 patients, seizure onset was in the non,language-dominant hemisphere. Two patients had seizures arising from the language-dominant hemisphere; in another patient, the side of the seizure onset could not be determined. Conclusions: Ictal spitting is an uncommon feature of epileptic seizures. Although the symptomatogenic area is probably outside the temporal lobe, it is most frequently seen in temporal lobe epilepsy of the right, nondominant hemisphere. [source]

Focal Semiologic and Electroencephalographic Features in Patients with Juvenile Myoclonic Epilepsy

EPILEPSIA, Issue 10 2005
Naotaka Usui
Summary:,Purpose: A few reports have described focal electroencephalographic or clinical features or both of juvenile myoclonic epilepsy (JME), but without video-EEG documentation. We examined focal clinical and EEG features in patients with JME who underwent video-EEG monitoring. Methods: Twenty-six patients (nine males and 17 females) who had seizures recorded during video-EEG monitoring were included. Age at seizure onset was 0 to 22 years (mean, 12.3 years), and age at monitoring was 12 to 44 years (mean, 26.5 years). In one patient with left parietooccipital epilepsy, primary generalized tonic,clonic seizures developed after resection of the parietal tumor. Two patients had both temporal lobe epilepsy and JME. Videotaped seizures in each patient were analyzed. Interictal and ictal EEG also were analyzed for any focal features. Results: Focal semiologic features were observed in 12 (46%) of 26 patients. Six patients had focal myoclonic seizures, and two had Figure 4 sign: one with version to the left, and another had left version followed by Figure 4 sign, and left arm clonic seizure. Their ictal EEGs were generalized at onset but with a lateralized evolution over the right hemisphere. The patient who had both JME and left parietooccipital epilepsy, right arm clonic seizure, and Figure 4 sign was seen during a generalized EEG seizure. Interictally, one patient had temporal sharp waves, and another had run of spikes in the right frontal region. Conclusions: Fourteen (54%) of 26 patients with JME exhibited focal semiologic or electroencephalographic features or both. Video-EEG was essential in reaching a correct diagnosis and choosing an appropriate antiepileptic drug regimen. [source]

Focal clinical and electroencephalographic features in patients with juvenile myoclonic epilepsy

ACTA NEUROLOGICA SCANDINAVICA, Issue 2 2010
S. S. Jayalakshmi
Jayalakshmi SS, Srinivasa Rao B, Sailaja S. Focal clinical and electroencephalographic features in patients with juvenile myoclonic epilepsy. Acta Neurol Scand: 2010: 122: 115,123. © 2009 The Authors Journal compilation © 2009 Blackwell Munksgaard. Objective,,, To identify prevalence and factors associated with occurrence of focal clinical and electroencephalogram (EEG) abnormalities in patients with juvenile myoclonic epilepsy (JME). Materials and methods,,, Clinical asymmetries in the seizures and focal EEG abnormalities were analyzed in 266 patients with JME. Results,,, All the patients had myoclonic jerks (MJ) and generalized tonic-clonic seizures (GTCS); 56 (21%) had absence seizures. Asymmetry in clinical seizures was reported in 45 (16.9%) and focal EEG abnormalities were noted in 92 (45.5%) patients. Amplitude asymmetry or focal onset of generalized discharges was noted in 41 (44.6%) and independent focal EEG abnormalities in 30 (32.6%) patients. A statistically significant association was seen with the presence of GTCS and MJ (P = 0.007), a family history of epilepsy (P = 0.001) and drug resistance (P = 0.04) and the occurrence of focal EEG abnormalities. Conclusion,,, Patients with JME showed focal clinical and EEG features. These features should not be misinterpreted as indicative of partial epilepsy. [source]