Diencephalon

Puelles, Luis, Martinez-de-la-Torre, Margaret, Ferran, Jose-Luis and Watson, Charles (2012). Diencephalon. In Charles Watson, George Paxinos and Luis Puelles (Ed.), The Mouse Nervous System (pp. 313-336) Australia: Elsevier Inc.. doi:10.1016/B978-0-12-369497-3.10009-3


Author Puelles, Luis
Martinez-de-la-Torre, Margaret
Ferran, Jose-Luis
Watson, Charles
Title of chapter Diencephalon
Title of book The Mouse Nervous System
Place of Publication Australia
Publisher Elsevier Inc.
Publication Year 2012
Sub-type Chapter in reference work, encyclopaedia, manual or handbook
DOI 10.1016/B978-0-12-369497-3.10009-3
Open Access Status
Year available 2012
ISBN 9780123694973
Editor Charles Watson
George Paxinos
Luis Puelles
Chapter number 9
Start page 313
End page 336
Total pages 24
Total chapters 33
Collection year 2012
Language eng
Formatted Abstract/Summary
The diencephalon is one of the three major parts of the forebrain, the other two being the telencephalon and the hypothalamus. It is continuous caudally with the midbrain, and rostrally with the hypothalamus. The developing diencephalon is formed by three segmental units that are clearly defined by gene expression. The three segments of the diencephalon are called prosomere 3, prosomere 2, and prosomere 1, from rostral to caudal. Each of the three prosomeres has alar and basal components, of which the alar parts are most prominent. The alar regions of the three prosomeres are the prethalamus, thalamus, and pretectum respectively; the smaller basal components form an underlying tegmental region in each case. These tegmental components were previously thought to be part of the midbrain. The alar diencephalic region that separates the midbrain from the thalamus has in the past been loosely referred to as the pretectum, a group of nuclei clustered around the posterior commissure. The neuromeric nature of prosomere 1 is difficult to appreciate in adult brains, because of the morphogenetic deformation of its derived structures between the midbrain on one hand, and prosomere 2 structures on the other. The thalamus is the largest part of the diencephalon in mammals. The two halves of the thalamus are partly fused together across the line of the median third ventricle. All sensory pathways, except the olfactory pathway, end in specific nuclei of the thalamus, and each sensory recipient nucleus projects to a specific area of cortex. The embryonic prosomere 3 of the diencephalon gives rise to the nuclei of the prethalamus. The nuclei of the prethalamus form a continuous shell around the rostral, lateral, and ventral topographic margins of the thalamus.
Q-Index Code BX
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Book Chapter
Collection: Queensland Brain Institute Publications
 
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Created: Mon, 27 Oct 2014, 16:12:52 EST by Sylvie Pichelin on behalf of Queensland Brain Institute