tela choroidea

Introduction

A portion of pia mater that covers the ependymal roof, or in the case of the lateral ventricle, the medial wall of a cerebral ventricle.

In the case of the 3rd ventricle, it is a double fold of pia mater enclosing subarachnoid trabeculae, between the fornix above & the epithelial roof of the 3rd ventricle & thalami below. At the lateral margins is a vascular fringe projecting into the choroidal fissure of the lateral ventricles. On its undersurface are several small vascular projections.

The internal cerebral veins pass inferiorly & merge to form the great cerebral vein of Galen with the tela choroidea of the 3rd ventricle.

More general terms

• tela
• pia mater