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a triangular prominence of the floor of the lateral ventricle at the transition between occipital and temporal horn, continuous rostrally with the collateral eminence and, like it, caused by the deep penetration of the collateral sulcus from the ventral surface of the temporal lobe.
Synonym(s): trigonum collaterale [TA], trigone of lateral ventricle, trigonum ventriculi, ventricular trigone
Farlex Partner Medical Dictionary © Farlex 2012
The angle between the diverging inferior and posterior horns of the lateral ventricle.
See also: trigone
Medical Dictionary, © 2009 Farlex and Partners