Somites in Developing Embryos

1. Front Matter

   Pages i-x

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2. Somitomeres: The Primordial Body Segments

   • Antone G. Jacobson, Stephen Meier

   Pages 1-16

3. The Metameric Organization of the Presomitic Mesoderm and Somite Specification in the Mouse Embryo

   • P. P. L. Tam, R. S. P. Beddington

   Pages 17-36

4. The Epiblast Origin of Avian Somite Cells

   • David S. Packard Jr.

   Pages 37-45

5. Aspects of Somite Formation in the Early Chick Embryo

   • Marjorie A. England

   Pages 47-60

6. The Early Development of the Intermediate Mesoderm in the Chick

   • Heinz Jürgen Jacob, Monika Jacob, Bodo Christ

   Pages 61-68

7. The Effects on Vertebral Development of Removing a Single Somite from A 2-Day Old Chick Embryo

   • K. M. Bagnall, E. J. Sanders, S. J. Higgins, H. Leam, E. Cheung

   Pages 69-78

8. On the Problem of Metamerism in the Head Mesenchyme of Chick Embryos

   • Monika Jacob, Franz Wachtler, Heinz Jürgen Jacob, Bodo Christ

   Pages 79-89

9. The Pattern of Communication Through Gap Junctions During Formation of the Embryonic Axis

   • Anne Warner

   Pages 91-103

10. A Unique Population of Non-Dividing Cells in the Somites

    • Dennis Summerbell, Helen Coetzee, Amata Hornbruch

    Pages 105-117

11. Somitogenesis in the Frog

    • Tom Elsdale, Duncan Davidson

    Pages 119-134

12. Heat Shock Effects in Chick Embryos

    • M. Veini, R. Bellairs

    Pages 135-145

13. Cell Lineage and the Formation and Maintenance of Half Somites

    • Claudio D. Stern, Roger J. Keynes

    Pages 147-159

14. The Tail Bud and Cessation of Segmentation in the Chick Embryo

    • Ruth Bellairs

    Pages 161-178

15. Models of Segmentation

    • Hans Meinhardt

    Pages 179-189

16. A Comparison of the Adhesiveness of Somitic Cells from Chick and Quail Embryos

    • Esmond J. Sanders

    Pages 191-200

17. The Adhesion Recognition Signal of Fibronectin: A Possible Trigger Mechanism for Compaction During Somitogenesis

    • James W. Lash, Kenneth M. Yamada

    Pages 201-208

18. Genetic Modifications of Developmental Acts in Chick and Mouse Somite Development

    • Donald A. Ede, A. O. A. El-Gadi

    Pages 209-224

19. CSAT Antibody Interferes with in Vivo Migration of Somitic Myoblast Precursors into the Body Wall

    • T. Jaffredo, A. F. Horwitz, C. A. Buck, P. M. Rong, F. Dieterlen-Lièvre

    Pages 225-236

20. Somite Chondrogenesis: Extracellular Matrix Production and Intracellular Changes

    • Nagaswami Sri Vasan

    Pages 237-246

Somite development is a unique and important topic; unique because somitic mesoderm is the first tissue to become segmented, important because the somites - once established - exert a profound influence on other seg­ mental structures which form later. Somite development is of interest at a number of levels. In one aspect, demarcation of a specific number of somites and size regulation, it is a particularly intriguing example of embryonic pattern formation, 'especially in vew of its possible relation to homoeobox-controlled segmentation in insects. At another level, somite development has long been studied by compara­ tive anatomists, but only recently has new light been thrown on such sub­ jects as segmentation of the head, proposed in the 18th century by Goethe and now a live issue for developmental biologists. Somit es are simple when they first appear, but very complex structures arise from them. These include the vertebrae and the axial and other muscles and consequently there is a wealth of morphogenetic problems to be explored. Sometimes their morphogenesis is disturbed, by genetic or environ­ mental factors, and there are many clinical conditions which arise as a result.

• adhesion
• antibody
• cells
• development
• embryo
• heat
• influence
• insects
• migration
• morphogenesis
• mouse
• population
• regulation
• structure
• tissue

• University College London, London, England

  Ruth Bellairs

• University of Glasgow, Glasgow, Scotland

  Donald A. Ede

• University of Pennsylvania, Philadelphia, USA

  James W. Lash

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