fMRI/EEG in paroxysmal activity elicited by elimination of central vision and fixation.
Using functional MRI (fMRI) with concurrent EEG monitoring the authors studied cortical activation associated with epileptiform discharges in three patients with fixation-off sensitivity. The EEG paroxysmal activity elicited by eliminating central vision correlated significantly with an increased blood oxygen level-dependent signal in the extrastriate cortex (Brodmann areas 19 and 37). fMRI provides a unique opportunity for localizing precisely the cortical areas generating paroxysmal activity in patients with fixation-off sensitivity.
Iannetti
G D
GD
Department of Neurological Sciences, University of Rome "La Sapienza," Pozzilli, Italy. giandomenico.iannetti@uniroma1.it
Di Bonaventura
C
C
Pantano
P
P
Giallonardo
A T
AT
Romanelli
P L
PL
Bozzao
L
L
Manfredi
M
M
Ricci
G B
GB
D000328:Adult; D002540:Cerebral Cortex / Q000503:physiopathology*; D003941:Diagnostic Techniques, Ophthalmological; D004569:Electroencephalography / Q000379:methods*; D004827:Epilepsy / Q000175:diagnosis / Q000503:physiopathology*; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D014786:Vision Disorders / Q000175:diagnosis / Q000503:physiopathology*; D015357:Vision Disparity / Q000502:physiology*; D014785:Vision, Ocular