see also hearth atrium.

AKA: Trigone

The junction of the temporal horn, the occipital horn, and the lateral ventricle's posterior body is called the atrium. The trigone region is the floor of this area where the temporal and occipital horns unite.

The trigone of the lateral ventricle is a triangular area defined by the temporal horn inferiorly, the occipital horn posteriorly, and the body of the lateral ventricle anteriorly.

Knowledge of the microsurgical anatomy of the atrium of the lateral ventricle and surrounding vital structures and the choice of an appropriate surgical approach will help surgeons perform safe and minimally invasive surgery ¹⁾.

Ventriculomegaly is a brain condition that occurs when the lateral ventricles become dilated. The most common definition uses a width of the atrium of the lateral ventricle of greater than 10 mm.

see Trigone tumor.