The image shows dopaminergic pathways of the human brain in normal condition (left) and Parkinsons Disease (right). Red Arrows indicate suppression of the target, blue arrows indicate stimulation of target structure. (Lenticular fasciculus visible but not labeled, as red line from GPi to THA.)
The lenticular fasciculus is a tract connecting the globus pallidus to the Thalamic fasciculus. The thalamic fasciculus (composed of the lenticular fasciculus and ansa lenticularis) runs into the Thalamus. It is sometimes considered synonymous with "field H2 of Forel".