Chapter

Centralization and Symmetry

Larry W. Swanson

in Brain Architecture

Second edition

Published on behalf of Oxford University Press

Published in print August 2011 | ISBN: 9780195378580
Published online September 2012 | e-ISBN: 9780199965120 | DOI: http://dx.doi.org/10.1093/med/9780195378580.003.1027
Centralization and Symmetry

More Like This

Show all results sharing this subject:

  • Development of the Nervous System

GO

Show Summary Details

Preview

This chapter examines the evolution of the nervous system in bilaterally symmetrical invertebrates, beginning with flatworms that are freely swimming predators. In these animals the nervous system becomes centralized into ganglia, nerves, and plexuses, and the process of cephalization or specialization of the nervous system in the head also begins. A topographic division of the nervous system into central and peripheral components is also apparent. In more highly evolved invertebrates the nervous system may display segments and, except in the head region, the central nervous system lies ventral to the digestive system.

Chapter.  3278 words.  Illustrated.

Subjects: Development of the Nervous System

Full text: subscription required

How to subscribe Recommend to my Librarian

Buy this work at Oxford University Press »

Users without a subscription are not able to see the full content. Please, subscribe or login to access all content.