Ventricles Sagittal Concepts

Ashley Davidoff MD

Introduction

The vectors of the ventricular System Overlaid on the Brain

The ventricular system is overlaid on a drawing of the brain. Each limb of the horizontal component is situated in a cerebral hemisphere. The angled parts that extend inferiorly represent the temporal horns. The vertical limb includes the third and fourth ventricles

The Deepest Layers of the Inverted C’s

In the diagram that describes the series of inverted “C” the ventricles are the deepest and most midline of the structures In this diagram it is demonstrated as the innermost teal bluue ring. The frontal horns are superior and anterior and the temporal horns are the most inferior and anterior.

The Major Components of the Ventricles

The diagram in the sagital projection reveals the horizontal portion called the lateral ventricle. It is a paired structure.The vertical portion (light green consists of the midline 3rd and 4th ventricle.

Detailed Components

The diagram in the sagital projection reveals the horizontal portion called the lateral ventricle. It is a paired structure, and houses the frontal horn, body, occipital horn and atrium. The vertical portion consists of the paired foramina of Munro, the midline third ventricle, the narro aqueduct of Sylvius, the 4th ventricle the anteriorly placed paired foramina of Luschka, and theposteriorly positioned foramen

The Recesses

The sagital projection reveals the horizontal portion called the lateral ventricle. It is a paired structure, and houses the frontal horn, body, occipital horn and atrium. The vertical portion consists of the paired foramina of Munro, the midline third ventricle, the narrow aqueduct of Sylvius, the 4th ventricle the anteriorly placed paired foramina of Luschka, and the posteriorly positioned foramen of Magendie There are 4 recesses that create an unusual shape to the third ventricle. Anteriorly the chiasmatic (optic) recesslies above the the infundibular recess. Posteriorly the sprapineal recess lies above the pineal recess.

Distribution Bewteen Forebrain Midbrain and Hindbrain

Distribution of the Ventricles

The diagram in the sagital projection reveals the anatomical distribution of the ventriclular components into the forebrain (green), midbrain (orange) and hindbrain (salmon).