Document Detail

Limbic lobe embryology and anatomy: dissection and MR of the medial surface of the fetal cerebral hemisphere.
MedLine Citation:
PMID:  8693985     Owner:  NLM     Status:  MEDLINE    
PURPOSE: To facilitate understanding of limbic lobe anatomy by showing embryologic transformations of the medial surface of the cerebral hemisphere. METHODS: Brains from fetal specimens ranging from 13 to 24 weeks of gestational age were dissected. Photographs were made of the medial surface of the cerebral hemisphere. MR images of different fetal specimens of similar age were made for comparison of MR anatomy with dissected material. RESULTS: At 13 weeks, the entire inner limbic arch of the hippocampal formation is visible on the medial surface of the cerebral hemisphere. The hippocampal sulcus extends from frontal lobe to temporal lobe. At 16 weeks, the outer neocortical limbic arch of the subcallosal area, cingulate gyrus, and parahippocampus gyrus is present. Growth of the corpus callosum is associated with reduction in size of the hippocampal formation in the frontal lobe. The sulcus of the corpus callosum is the remnant of the anterior part of the hippocampal sulcus. At 18 weeks, growth of the parahippocampal gyrus begins to conceal the hippocampal formation. The supracallosal gyrus (indusium griseum), hidden from view by the corpus callosum, and the paraterminal gyrus are remnants of the previously larger hippocampal formation. CONCLUSIONS: Analysis of fetal specimens in different developmental stages with dissection and MR provides insight into embryologic transformations responsible for the complex anatomy of the limbic lobe.
E L Kier; R K Fulbright; R A Bronen
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  AJNR. American journal of neuroradiology     Volume:  16     ISSN:  0195-6108     ISO Abbreviation:  AJNR Am J Neuroradiol     Publication Date:  1995 Oct 
Date Detail:
Created Date:  1996-08-23     Completed Date:  1996-08-23     Revised Date:  2008-02-14    
Medline Journal Info:
Nlm Unique ID:  8003708     Medline TA:  AJNR Am J Neuroradiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1847-53     Citation Subset:  IM    
Section of Neuroradiology, Yale University School of Medicine, New Haven, Conn. 06520, USA.
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MeSH Terms
Fetus / anatomy & histology*
Gestational Age
Hippocampus / anatomy & histology,  embryology*
Magnetic Resonance Imaging*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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