Unique Morphological Features of the Proliferative Zones and Postmitotic Compartments of the Neural Epithelium Giving Rise to Striate and Extrastriate Cortex in the Monkey

We examined the development of the occipital lobe in fetal monkeys between embryonic day 37 (E37) and E108 in Nissl-stained and acetylcholine esterase (AChE)-reacted sections. We paid particular attention to features that distinguish the development of presumptive area 17. At E46 the neuroepithelium...

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Published in:	Cerebral cortex (New York, N.Y. 1991) Vol. 12; no. 1; pp. 37 - 53
Main Authors:	Smart, Iain H.M., Dehay, Colette, Giroud, Pascale, Berland, Michel, Kennedy, Henry
Format:	Journal Article
Language:	English
Published:	United States Oxford University Press 01-01-2002 Oxford Publishing Limited (England)
Subjects:	Acetylcholinesterase - metabolism Animals Epithelial Cells - enzymology Epithelial Cells - physiology Epithelium - embryology Epithelium - enzymology Female Immunohistochemistry Macaca fascicularis Mice Mitosis - physiology neuroepithelium Neurons - physiology Neuropeptide Y - metabolism Occipital Lobe - anatomy & histology Occipital Lobe - embryology Occipital Lobe - enzymology Pregnancy Telencephalon - cytology Telencephalon - embryology Visual Cortex - anatomy & histology Visual Cortex - embryology Visual Cortex - enzymology
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Summary:	We examined the development of the occipital lobe in fetal monkeys between embryonic day 37 (E37) and E108 in Nissl-stained and acetylcholine esterase (AChE)-reacted sections. We paid particular attention to features that distinguish the development of presumptive area 17. At E46 the neuroepithelium consists of a ventricular zone and a monolayer cortical plate sandwiched between a thin marginal zone and a minimal presubplate. Between E55 and E65 an augmented subplate emerges and continues to expand up to E94 to become a major compartment of the developing cortex. A mitotic subventricular zone is established by E55. Peaking in depth at E72, it constitutes the principal germinal zone. By E78 an invading fibre tract divides it into an outer radially organized zone and a more conventional inner zone. AChE staining reveals the future area 17/18 border from E86 onwards. Proceeding from presumptive area 17 to area 18 there is a progressive thinning of the radially structured subventricular zone. Comparison of these results with corticogenesis in rodents suggests a number of potentially unique primate features: (i) a minimal preplate stage; (ii) a radially augmented germinal zone not previously described in non-primates; (iii) a fibre tract dividing the subventricular zone into two laminae; (iv) late generation and expansion of the subplate.
Bibliography:	PII:1460-2199 local:0120037 ark:/67375/HXZ-R93KPLC8-2 istex:C0AB4CF7FC8DB234588FCD0E2A8C6F7AADAF0918 Henry Kennedy, Cerveau et Vision, Unité 371 INSERM, 18 Avenue Doyen Lépine, 69675 Bron Cedex, France. Email: kennedy@lyon151.inserm.fr. ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 ObjectType-Article-1 ObjectType-Feature-2 Current address: Faculté de Médecine Lyon-Nord, Hôpital Claude Bernard, Service de Gynécologie et Obstétrique, 69600 Oullins, France Back Current address: Department of Anatomy and Physiology, School of Life Sciences, Old Medical School, The University, Dundee, Scotland DD1 4HN, UK Back
ISSN:	1047-3211 1460-2199 1460-2199
DOI:	10.1093/cercor/12.1.37