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The subthalamus or ventral thalamus is a part of the diencephalon. [1] Its most prominent structure is the subthalamic nucleus . The subthalamus connects to the globus pallidus , a subcortical nucleus of the basal ganglia .
In terms of anatomy, it is the major part of the subthalamus. As suggested by its name, the subthalamic nucleus is located ventral to the thalamus. It is also dorsal to the substantia nigra and medial to the internal capsule.
The fields of Forel is a complex region in the posterior subthalamus, consisting of a concentrated collection of bundles of fibers. [1] The tracts formed include the thalamic fasciculus that includes the ansa lenticularis and lenticular fasciculus, cerebellothalamic tracts, and pallidothalamic tracts. Other included fibers connect to other ...
3.1.5 Subthalamus (HPA axis) 3.1.6 Pituitary gland (HPA axis) 3.2 Telencephalon (cerebrum) Cerebral hemispheres. ... "Brain Anatomy and How the Brain Works".
The thalamic fasciculus is a component of the subthalamus (ventral thalamus). It is synonymous with field H 1 of Forel.Fibers from the lenticular fasciculus (field H 2 of Forel), are joined by fibers from the ansa lenticularis – different parts of the internal globus pallidus, before they enter the ventral anterior nucleus of the thalamus to form the thalamic fasciculus.
Anatomy [ edit ] The thalamus is a paired structure of gray matter about four centimetres long, located in the forebrain which is superior to the midbrain , near the center of the brain with nerve fibers projecting out to the cerebral cortex in all directions.
The subthalamic fasciculus is a bi-directional nerve tract that interconnects the lateral globus pallidus and subthalamic nucleus as part of the indirect pathway.The pallidal efferents are GABAergic, but also contain enkephalin.
In terms of anatomy, the basal ganglia are divided into four distinct structures, depending on how superior or rostral they are (in other words depending on how close to the top of the head they are): Two of them, the striatum and the pallidum, are relatively large; the other two, the substantia nigra and the subthalamic nucleus, are smaller.