Sleep EEG and developmental dysphasia: lack of a consistent relationship with paroxysmal EEG activity during sleep.
In order to clarify the relationship between developmental dysphasia and EEG abnormalities, paroxysmal activities during sleep were studied in a series of 24 children with expressive developmental dysphasia (mean age 8 years) and compared to a control group of 39 children (mean age 9 years). The children of both groups were selected excluding cases with prior history of neurological disease or epilepsy. In the control group, 37 children had normal sleep EEG while 2 children had paroxysmal abnormalities. In the dysphasic group, epileptic abnormalities were observed in 9 cases, rare in 4 cases and frequent in 5 cases (density: 2.5 to 66.2% of total sleep time). Nevertheless, paroxysmal abnormalities did not reach the frequency described in the Landau-Kleffner syndrome, and it is unlikely that EEG abnormalities could have produced dysphasia.
Duvelleroy-Hommet
C
C
Service de Neurochirurgie-Neurologie Pédiatriques, Hôpital de Clocheville, France.
Billard
C
C
Lucas
B
B
Gillet
P
P
Barthez
M A
MA
Santini
J J
JJ
Degiovanni
E
E
Henry
F
F
De Toffol
B
B
Autret
A
A
D001037:Aphasia / Q000503:physiopathology*; D001921:Brain / Q000503:physiopathology; D001927:Brain Diseases / Q000175:diagnosis / Q000503:physiopathology; D002648:Child; D002675:Child, Preschool; D003937:Diagnosis, Differential; D004569:Electroencephalography; D004827:Epilepsy / Q000503:physiopathology; D005260:Female; D007839:Functional Laterality; D006801:Humans; D008297:Male; D012894:Sleep Stages; D012895:Sleep, REM; D013577:Syndrome