Tela chorioidea of the fourth ventricle
Encyclopedia
The tela chorioidea of the fourth ventricle is the name applied to the triangular fold of pia mater
which is carried upward between the cerebellum
and the medulla oblongata
.
It consists of two layers, which are continuous with each other in front, and are more or less adherent throughout:
Pia mater
Pia mater often referred to as simply the pia, is the delicate innermost layer of the meninges, the membranes surrounding the brain and spinal cord. The word finds its roots in Latin, meaning literally "tender mother." The other two meningeal membranes are the dura mater and the arachnoid mater....
which is carried upward between the cerebellum
Cerebellum
The cerebellum is a region of the brain that plays an important role in motor control. It may also be involved in some cognitive functions such as attention and language, and in regulating fear and pleasure responses, but its movement-related functions are the most solidly established...
and the medulla oblongata
Medulla oblongata
The medulla oblongata is the lower half of the brainstem. In discussions of neurology and similar contexts where no ambiguity will result, it is often referred to as simply the medulla...
.
It consists of two layers, which are continuous with each other in front, and are more or less adherent throughout:
- The posterior layer covers the antero-inferior surface of the cerebellum.
- The anterior layer is applied to the structures which form the lower part of the roof of the ventricle, and is continuous inferiorly with the pia mater on the inferior peduncles and closed part of the medulla.