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Welcome to Sylvius 4 Online

Sylvius 4 Online provides a unique Web-based learning environment for exploring and understanding the structure of the human central nervous system.

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Please Note: The account registration process has recently changed. Online purchase and registration (using an access code) are now available via Oxford Learning Link.

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Sylvius 4 Online is a new, online-only version of Sylvius 4. This version can be used on any computer with an active Internet connection and up-to-date Web browser. Adobe Flash is no longer required. (See System Requirements for details.)

If you had an account for Sylvius 4, you can transfer your account over to this new version for free. This will deactivate your account on the previous version, please make sure to read the details on the transfer page.

If you purchased a textbook that has a Sylvius 4 registration code included with it, you can register that code on the standard registration page as long as it hasn't been previously used to make an account. Likewise, if you bought Sylvius 4 standalone but never registered your code, your code can be used on the same registration page.

Technical Support

For support, please contact us via our support portal. Be sure to include:

  • Your name
  • The name of this site (Sylvius 4 Online)
  • A description of the problem you are having
  • Any additional information you think could be useful.

System Requirements

Sylvius 4 Online is a Web-based program that runs within your Web browser and requires an active Internet connection as well as the following:

  • Desktops/Laptops: Internet Explorer 9 or newer, Firefox 18 or newer, Chrome 25 or newer, Safari 5 or newer. (Latest version of Chrome recommended.)
  • Tablets: 10-inch screen and 1GB of RAM recommended. (If using iPad, iPad 3 or newer recommended.) Older and/or smaller tablets may work, but performance may not be optimal.

Terms of Use

The materials included in this site are protected by copyright. Permission to use these materials is strictly limited to those uses described below; any other use requires written permission of the copyright holder.

Use of these materials is limited to the personal use of the purchaser/licensee who has purchased access to this site/title published by Sinauer Associates, Inc. You may not share your access to this site with others. You may not distribute the materials contained in this site, nor may you publish or print the materials in any way without first receiving written permission from the copyright holder(s). In using this site, you are agreeing to these Terms of Use and acknowledging the copyrights to the materials contained herein.

If you have any questions regarding permitted uses of the materials on this site, please contact Make sure to include the title of this site in your query.