Nucleus cuneatus
The nucleus cuneatus (syn. Burdach core , after Friedrich Burdach ) 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 nucleus on the posterior wall of the medulla oblongata, which is known as the tuberculum cuneatum . The nucleus cuneatus belongs to what is known as the lemniscal system (posterior strand tract), a pathway for sensitive perception in mammals . Like the nucleus gracilis , it is therefore also referred to as the dorsal core . The core area arises in the embryonic form from neuroblasts of the brain anlage migrating from the wing plate .
It gets its afferents from the fasciculus cuneatus . In the nucleus cuneatus 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 .
The nucleus cuneatus has an additional smaller core area attached, which is called the nucleus cuneatus accessorius . This core area forwards part of the afferents from the cuneatus fasciculus via the cuneocereballar tract to the cerebellum .
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.