Editing Subthalamic nucleus (section)

{{short description|Small lens-shaped nucleus in the brain}}
{{cs1 config|name-list-style=vanc|display-authors=6}}
{{Infobox brain
| Name            = Subthalamic nucleus
| Latin           = nucleus subthalamicus
| Image           = Basal-ganglia-coronal-sections-large.png
| Caption         = Coronal slices of human brain showing the [[basal ganglia]] ([[external globus pallidus]] (GPe) and [[internal globus pallidus]] (GPi)), '''subthalamic nucleus''' (STN) and [[substantia nigra]] (SN).
| Image2          = DA-loops in PD.svg
| Caption2        = DA-loops in [[Parkinson's disease]]
| Acronym         = STN
| IsPartOf        = [[Subthalamus]] (physically); [[basal ganglia]] (functionally)
| Components      =
| Artery          =
| Vein            =
}}
The '''subthalamic nucleus''' ('''STN''') is a small lens-shaped [[Nucleus (neuroanatomy)|nucleus]] in the [[brain]] where it is, from a functional point of view, part of the [[basal ganglia]] system. In terms of anatomy, it is the major part of the [[subthalamus]]. As suggested by its name, the subthalamic nucleus is located [[Anatomical terms of location|ventral]] to the [[thalamus]]. It is also dorsal to the [[substantia nigra]] and medial to the [[internal capsule]].