Document Detail

Quantitative changes in the fundamental structural pattern of the diencephalon among primates and insectivores.
MedLine Citation:
PMID:  114466     Owner:  NLM     Status:  MEDLINE    
The volumes of the main components of the diencephalon from 10 basal insectivores, 12 prosimians, and 15 simians including man were compared. The comparison of the percentage composition within the diencephalon shows that the thalamus and the subthalamus increase whereas the epithalamus and the hypothalamus decrease in relative size among primates. The allometric analysis reveals that, in spite of a relative reduction, the epithalamus and the hypothalamus are also progressive structures. However, their allometric size increase, being especially accentuated in earlier phyletic phases, is small in comparison to that of the thalamus and the subthalamus. These latter two components are characterized by a continuous phylogenetic growth from the basal insectivores to the simians. The correlation analysis shows that the strongest correlations and, in many cases, that isometric size increase exist between structures which belong to the same functional system. These findings indicate the existence of at least two major developmental gradients in the quantitative development of the diencephalon, a neencephalic and a limbic one.
G Baron
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Folia primatologica; international journal of primatology     Volume:  31     ISSN:  0015-5713     ISO Abbreviation:  Folia Primatol.     Publication Date:  1979  
Date Detail:
Created Date:  1979-12-29     Completed Date:  1979-12-29     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0370723     Medline TA:  Folia Primatol (Basel)     Country:  SWITZERLAND    
Other Details:
Languages:  eng     Pagination:  74-105     Citation Subset:  IM    
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MeSH Terms
Diencephalon / anatomy & histology*
Galago / anatomy & histology
Haplorhini / anatomy & histology
Hypothalamus / anatomy & histology
Insectivora / anatomy & histology*
Lemur / anatomy & histology
Pan troglodytes / anatomy & histology
Papio / anatomy & histology
Primates / anatomy & histology*
Thalamus / anatomy & histology
Tupaiidae / anatomy & histology

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

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