Brain's Body Of The Lateral Ventricle, Posterior View

Description

Lateral ventricle anatomy is centered on the body as it courses posteriorly within the cerebral hemisphere toward the atrium (trigone) and the posterior horn. From this posterior viewpoint, the ventricular lumen is appreciated as a continuous cavity, with the body narrowing into the posterior horn while widening at the atrium where the body, posterior horn, and inferior horn converge. Superior and lateral margins correspond to callosal and parietal white matter, while the medial contour aligns with the midline partition formed by septal structures and adjacent periventricular tissue. Spatial relationships are easiest to read here: posterior is toward the occipital pole, superior toward the splenial region, and medial toward the interhemispheric fissure. Ventricular caliber in the body and atrium is a day-to-day clinical metric in hydrocephalus and in the evaluation of cerebral atrophy, and the posterior horn is a common site where occipital horn enlargement is reported on CT and MRI. Intraventricular hemorrhage often layers dependently in the atrium, near the glomus of the choroid plexus, so a posteriorly oriented rendering helps orient the reader to why blood products or debris may accumulate at the trigone rather than in the frontal horn. Landmarks like the transition from body to atrium also matter when planning or teaching ventricular catheter trajectories, where slight shifts can place the catheter tip too posteriorly into the occipital horn or too medially against the septal wall. Scale matters. Neuroanatomy courses, neuroradiology atlases, and neurosurgical teaching files use this illustration to pair ventricular morphology with posterior horn and atrial pathology, including colpocephaly and periventricular leukomalacia in pediatric brain imaging. Anatomical accuracy verified by SciePro's Medical Advisory Board.