part of part of ventral thalamus diencephalic white matter ansa lenticularis http://upload.wikimedia.org/wikipedia/commons/9/94/DA-loops_in_PD.jpg ansa lenticularis in thalamo Wikipedia:Ansa_lenticularis SCTID:37467007 NLXANAT:1010011 HBA:9237 DHBA:10571 ventral peduncle of lateral forebrain bundle ansa lenticularis in thalamus BAMS:al UBERON:0009641 neuronames:444 FMA:62070 The ansa lenticularis (ansa lentiformis in older texts) is a part of the brain, making up the superior layer of the substantia innominata of Meynert. Its fibers, derived from the medullary lamina of the lentiform nucleus, pass medially to end in the thalamus and subthalamic region, while others are said to end in the tegmentum and red nucleus. It is classified by NeuroNames as part of the subthalamus.