MSI /fMRI/ sEEG Flashcards
This FMRI is done during verb generation task vs resting. What does it show?
Broca’s area in left frontal lobe (note that positive right hemisphere findings are not atypical)
What do each of the following correlate in terms of seizure localization
- Anterior temporal horizontal anterior-posterior dipole
- anterior temporal vertical dipole (2)
- posterior vertical dipoles
Anterior temporal horizontal anterior-posterior dipole
- mesial temporal seizure onset (ipsilateral)
Anterior temporal vertical dipole
- anterior temporal onset
- possible medial temporal onset
Posterior vertical dipoles
- lateral or nonlocalized seizure onset.
In patients with MTLE, what do the following MSI findings indicate?
- ATV dipole
- ATH dipole (2)
ATV dipole: epileptic activity in medial basal temporal region (ipsilateral)
ATH dipole:
- temporal pole and adjacent part of lateral temporal cortex
- 50% with TH dipoles exhibit bitemporal spikes and/or seizure onsets