What is the major outflow of the basal ganglia?
The major outflow of the basal ganglia projects from the medial globus pallidus as a fiber bundle known as the lenticular fasciculus (Forel’s field H2).
Another bundle from the medial globus pallidus loops around the internal capsule as the ansa lenticularis. It then merges in Forel’s field H with the lenticular fasciculus and with fibers from the dentatorubrothalamic tract.
These fibers then continue as the thalamic fasciculus (Forel’s field H1) and synapse in the thalamic nuclei: centromedian, ventral lateral, and ventral anterior.
These thalamic nuclei then relay information up to the motor cortex.
