Sagittal midline of the brain - normal anatomy

Series of annotated images of the sagittal midline of the brain in a normal participant.

Image 1: normal sagittal midline demonstrating the central venous vasculature and cisterns.
1. Great cerebral vein of Galen
2. Internal cerebral vein
3. Thalamostriate vein
A. Cistern of the laminae terminalis
B. Chiasmatic cistern
C. Interpeduncular cistern
D. Ambient cistern
E. Quadrigeminal cistern
F. Cerebellopontine cistern
G. Prepontine cistern
H. Lateral cerebellomedullary cistern
I. Cisterna magna

Image 2: normal sagittal midline demonstrating the continuity of the CSF flow channels.

1. Intraventricular foramen of Monroe
2. Posterior floor of the third ventricle formed by the convex superior border of the midbrain
3. Cerebral aqueduct of Sylvius
4. Median aperture of Magendie

​Image 3: normal sagittal midline demonstrating some of the major contours of the brainstem and diencephalon. 

1. Body of the fornix
2. Laminae terminalis
3. Columns of the fornix leading into the mammilary bodies
4. The normal convex border of the midbrain
5. Tegmentum of the midbrain
6. Tectum of the midbrain