frontotemporal lobe dementia symptomspartial frontal lobe seizuresfrontal lobe absence seizuresnocturnal frontal lobe seizuresfrontal lobe seizure disorderright frontal temporal lobe seizuresfrontal lobe seizures videofrontotemporal lobe dementia stageslobe dementiafrontotemporal lobefrontal lobe complex partial seizuresfrontal lobe seizures eeg