Subthalamus definition- the ventral part of the thalamus


Subthalamus is the part of the diencephalon which is wedged laterally between the thalamus and the hypothalamus.


Subthalamus is important for regulating movements produced by skeletal muscles.

It is, not surprisingly, interconnected with other structures important in movement, such as the basal ganglia and substantia nigra.


The bulk of the subthalamus is made up of the subthalamic nucleus and another gray matter component is the zona incerta. There are also several fiber bundles in the subthalamus. They are the: subthalamic fasciculus, lenticular fasciculus, and ansa lenticularis


Subthalamus definition may also be given as - a transition zone in the anterior part of the diencephalon interposed between the thalamus, hypothalamus, and tegmentum of the mesencephalon. Components of the subthalamus include the subthalamic nucleus, zona incerta, nucleus of field H, and the nucleus of ansa lenticularis. The latter contains the entopedencular nucleus.