The magnetic field of epileptic spikes agrees with intracranial localizations in complex partial epilepsy.

The magnetoencephalogram (MEG) and electroencephalogram (EEG) were measured during interictal epileptic spikes in nine patients with complex partial seizures. The MEG localization estimates were compared with localizations by intraoperative cortical electrodes, subdural electrodes, stereotaxic depth electrodes, anatomic imaging, postoperative pathologic analysis, and postoperative follow-up. In all patients, MEG localization estimates were in the same lobe as the epileptic focus determined by invasive methods and EEG.

Ocular counterrolling abnormalities in spasmodic torticollis.

Spasmodic torticollis is a focal dystonic movement disorder of unknown origin, long hypothesized to have some vestibular involvement. An examination of otolith function, ocular counterrolling, was performed on eight patients with this disorder. The test consisted of photographing both eyes while the subject underwent rotation in both naso-occipital and earth-horizontal long axes.

PET/dementia: an update.

Positron Emission Tomography (PET) has held considerable promise as an investigative tool in the field of dementia but has yet to fulfill this promise. Review of pertinent problems in PET/dementia studies provides encouraging directions for future research.