Sleep related epilepsy in focal cortical dysplasia type 2: Insights from sleep recordings in presurgical evaluation.
Clin Neurophysiol
; 131(3): 609-615, 2020 03.
Article
en En
| MEDLINE
| ID: mdl-31972504
ABSTRACT
OBJECTIVE:
To determine the relationship between seizure onset, sleep stage and focal cortical dysplasia type 2 (FCD2) location in sleep related epilepsy (SRE).METHODS:
We reviewed scalp video-EEG data of 77 patients with SRE among 130 surgically treated patients with histologically confirmed FCD2. Seizure onset was classified as occurring during NREM, REM and after arousal.RESULTS:
Sleep recordings were available for 65 patients (37 males, 7-49 years old). FCD2 was located in frontal lobe in 46 (71%) and in extra-frontal regions in 19, including the temporal lobe in 6. MRI was negative/doubtful in 35 cases. Interictal rhythmic/pseudorhythmic spike rate increased from 31% during waking to 65% during sleep. Seizure onset occurred from NREM in 46 cases (71%), mostly from stage 2, and after arousal in 14 (22%). Seizures occurring from NREM/REM sleep were significantly more frequent in frontal (89%) compared to extra-frontal location (42%), whilst arousal preceded seizure onset more often in extra-frontal (58%) compared to frontal location (7%).CONCLUSIONS:
NREM seizure onset is the most common ictal pattern in SRE due to frontal FCD2 whereas preceding arousal points to extra-frontal regions.SIGNIFICANCE:
Sleep recordings may help for FCD2 localisation and suggest topography dependent impact on sleep related epileptic networks.Palabras clave
Texto completo:
1
Base de datos:
MEDLINE
Asunto principal:
Sueño
/
Lóbulo Temporal
/
Epilepsia
/
Malformaciones del Desarrollo Cortical de Grupo I
/
Lóbulo Frontal
Idioma:
En
Revista:
Clin Neurophysiol
Asunto de la revista:
NEUROLOGIA
/
PSICOFISIOLOGIA
Año:
2020
Tipo del documento:
Article