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| Research article summary (published 27 Feb 2002): |
Individual variations in the sulcal anatomy of the basal temporal lobe and its relevance for epilepsy surgery: an anatomical study performed using magnetic resonance imaging.
Full Abstract
OBJECT:
The concept of selective amygdalohippocampectomy is based on pathophysiological insights into the epileptogenicity of the hippocampal region and the definition of the clinical syndrome of mesial temporal lobe epilepsy (TLE). High-resolution magnetic resonance (MR) imaging allows correlation of the site of histologically conspicuous tissue with anatomical structure. The highly variable sulcal pattern of the basal temporal lobe, however, definitely complicates the morphometric analysis of histomorphologically defined subdivisions of the hippocampal region. The goal of this study was to define individual variations in the sulcal anatomy on the basis of preoperative MR images obtained in patients suffering from TLE.
METHODS:
The authors analyzed coronal MR images obtained in 50 patients for the presence of and intrinsic relationships among the rhinal, collateral, and occipitotemporal sulci. The surface relief of consecutive sections of 100 temporal lobes was graphically outlined and the resulting maps were used for visual analysis. The sulci were characterized by measurement of their depth, distance to the temporal horn, and laterality. The anatomical measurements and frequencies of sulcal patterns were assessed for statistical correlation with patients' histories and the lateralization of the seizure focus.
CONCLUSIONS:
Statistical assessment shows that patient sex is a significant factor in sulcal patterns. Anatomical measurements are significantly decreased on the side of the seizure origin, which relates to loss of white matter, a known morphological abnormality associated with TLE. Magnetic resonance imaging allows for accurate preoperative knowledge of individual sulcal patterns and facilitates intraoperative orientation to anatomical landmarks.
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Author information
Author/s: Novak, Klaus (K); Czech, Thomas (T); Prayer, Daniela (D); Dietrich, Wolfgang (W); Serles, Wolfgang (W); Lehr, Stephan (S); Baumgartner, Christoph (C);
Affiliation: Department of Neurosurgery, University of Vienna Medical School, Austria. klaus.novak(-atsign-)akh-wien.ac.at
Journal and publication information
Publication Type: Journal Article
Journal: Journal of neurosurgery (J Neurosurg), published in United States. (Language: eng)
Reference: 2002-Mar; vol 96 (issue 3) : pp 464-73
Dates: Created 2002/03/08; Completed 2002/03/29; Revised 2004/11/17;
PMID: 11883830, status: MEDLINE (last retrieval date: 11/6/2008)
Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.
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