Gracilis nucleus
The nucleus gracilis (syn. Goll core , after Friedrich Goll ) is a collection of nerve cells ( core area ) in the medulla oblongata at the caudal end of the diamond pit . Visible from the outside, a hill protrudes through the core of the posterior wall of the medulla oblongata, which is known as the tuberculum gracile . The nucleus gracilis belongs to the so-called lemniscale system (posterior strand tract), a conduction pathway for sensitive perception in mammals . Like the nucleus cuneatus , it is therefore also known as the dorsal core . Embryonal formed the core area of the wing panel migrating neuroblasts of the brain system.
It draws its afferents from the gracilis fasciculus . In the gracilis nucleus, these are synaptically switched to the second neuron. The efferents run as the bulbothalamic tract to the posterolateral nucleus of the thalamus . They cross in the medulla oblongata - more precisely in the intersection of loops (Decussatio lemniscorum) - as the external arcuate fibers on the other side of the body and then run as the medial lemniscus into the diencephalon .
literature
- Theodor H. Schiebler, Horst-W. Korf: Anatomy: histology, history of development, macroscopic and microscopic anatomy, topography . Springer, 10th edition 2007, ISBN 9783798517707 , p. 815.
- Martin Trepel: Neuroanatomy . Urban & Fischer, 3rd edition 2003, ISBN 3437412973 , p. 124.
- Hans Frick, Helmut Leonhardt, Dietrich Starck: Spezial Anatomie Georg Thieme Verlag, 1992, ISBN 978-3133569040 , p. 283 ff.