Fields of forel
The fields of Forel are areas in a deep part of the brain known as the diencephalon. They are below the thalamus and consists of three defined, white matter areas of the subthalamus. These three regions are also named "H fields".
The first, field H1, is the thalamic fasciculus, a horizontal white matter tract composed of the ansa lenticularis, lenticular fasciculus, and cerebellothalamic tracts between the subthalamus and the thalamus. These fibers are projections to the ventral anterior and ventral lateral thalamus from the basal ganglia (globus pallidus) and the cerebellum. H1 is separated from H2 by the zona incerta.