Choroid line of lateral ventricle

The choroid line of lateral ventricle is the linear attachment of the tela choroidea and choroid plexus along the medial aspect of the thalamic ventricular surface in the body of the lateral ventricle.

It corresponds to the choroidal fissure, which lies between the fornix medially and the thalamus/lamina affixa laterally. Along this line, the tela choroidea carrying the choroid plexus is attached; therefore, the choroid line should not be confused with the choroid plexus itself.

In relation to the lamina affixa, the referenced paper below describes the ventricular surface of the thalamus as triangular: its medial limb is formed by the tela choroidea (choroid line), whereas its lateral limb is formed by the caudato-thalamic groove, containing the stria terminalis and thalamostriate vein.

Thus, in the body of the lateral ventricle, the two useful longitudinal landmarks on the superior thalamic surface are the choroid line medially and the caudato-thalamic groove/stria terminalis laterally, with the lamina affixa lying between them.