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Anatomy of the Ventricular System

Last Updated: September 30, 2018

The Rhoton Collection: Navigating the Ventricles

The discussion regarding the operative anatomy of the ventricular system is divided into three parts:

  1. Lateral Ventricle Anatomy
  2. Third Ventricle Anatomy
  3. Fourth Ventricle Anatomy


Anatomically, the lateral ventricle can be thought of as a C-shaped capsule encompassing the thalamus and diencephalon. It is partitioned into five segmental divisions, which hold important distinctions during consideration of surgical approaches.

These five divisions are the anterior (frontal) horn, body, atrium (trigone), temporal horn, and occipital horn. For a more detailed description of the lateral ventricular segments, see the discussion in the Principles of Intraventricular Surgery chapter.

An interface exists between the lateral...