Warning: all items and those of a medical nature and/or pharmaceutical and/or legal published on Wikipedia (and in any part of TerritorioScuola Enhanced Wiki Alpha) must always be carefully checked before any use.
It is a bidirectional connection between the GP and the subthalamic nucleus, including (1) fibers running from the GPe to the subthalamic nucleus, and (2) fibers running from the STN back to the GP.1
^DeJong, Russell N.; Campbell, William; Haerer, Armin F. (2005). DeJong's the neurologic examination: incorporating the fundamentals of neuroanatomy and neurophysiology. Hagerstwon, MD: Lippincott Williams & Wilkins. p. 340. ISBN0-7817-2767-7.