[Paradoxical air embolism of intracerebral arteries as a complication of tooth extraction].

The article describes the rare clinical case, demonstrating sudden onset of neurological manifestations (seizures and consequent formation of ischemic stroke foci) in a 29 year-old female patient during tooth extraction (right lower third molar) using the high-speed dental drill. Air injection through damaged tissues caused subcutaneous emphysema in the buccal area that caused air embolism. Presence of asymptomatic congenital heart defect in the patient (atrial septal defect) allowed the bubbles of air to move paradoxically from right to left with consequent embolization of small cerebral arteries.

Long association tracts of the human white matter: an analysis of 18 hemisphere dissections and in vivo HARDI-CSD tractography.

Background: Anatomy of the conduction tracts of the cerebral cortex has been studied for a long time. Invention of diffusion tensor tractography renewed interest in this subject. The objectives of this work were to develop and improve protocols for dissection of the long association tracts of the human brain with studying the features of their segmentation, topography, and variability, compare the obtained data with the MR tractography data, and prepare for further clinical and anatomical studies.