Document Detail

Microvascular anatomy of the medial temporal region: part 1: its application to arteriovenous malformation surgery.
MedLine Citation:
PMID:  20679924     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: The medial temporal region (also called the temporomesial or mediobasal temporal region) is the site of the most complex cortical anatomy.
OBJECTIVE: To investigate the anatomic variability of the arterial supply and venous drainage of each segment of the medial temporal region (MTR), and to discuss and illustrate the implications of the findings for surgery of arteriovenous malformations (AVM) of the MTR.
METHODS: Forty-seven cerebral hemispheres and 10 silicon-injected cadaveric heads were examined using x3 to x40 magnification. Illustrative surgical cases of MTR AVMs were selected.
RESULTS: The anterior choroidal artery (AChA) gave rise to an anterior uncal artery in 83% of hemispheres and a posterior uncal or unco-hippocampal artery in 98%. The plexal segment of the AChA gave off neural branches in 38%. The MCA was the site of origin of anterior uncal, unco-parahippocampal, or anterior parahippocampal arteries in 94% of hemispheres. An anterior uncal artery arose from the internal carotid artery (ICA) in 45% of hemispheres. The posterior cerebral artery (PCA) irrigated the entorhinal area through its anterior parahippocampal or hippocampo-parahippocampal branches in every case. A PCA bifurcation was identified in 89% of hemispheres, typically at the middle segment of the MTR. The most common pattern of bifurcation was by division into posteroinferior temporal and parieto-occipital arterial trunks. The anterior segment of the basal vein had a predominant anterior drainage in 35% of hemispheres, and the middle segment had a predominant inferior drainage in 16%.
CONCLUSION: An understanding of the vascular variability of the MTR is essential for accurate microsurgical resection of MTR AVMs.
Juan C Fernández-Miranda; Evandro de Oliveira; Pablo A Rubino; Hung Tzu Wen; Albert L Rhoton
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Neurosurgery     Volume:  67     ISSN:  1524-4040     ISO Abbreviation:  Neurosurgery     Publication Date:  2010 Sep 
Date Detail:
Created Date:  2010-08-23     Completed Date:  2010-12-13     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7802914     Medline TA:  Neurosurgery     Country:  United States    
Other Details:
Languages:  eng     Pagination:  ons237-76; discussion ons276     Citation Subset:  IM    
Department of Neurological Surgery, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, USA.
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MeSH Terms
Arteriovenous Malformations / pathology,  surgery
Cerebral Arteries / anatomy & histology*
Temporal Lobe / anatomy & histology*,  surgery

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