Nucleus dorsalis nervi vagi

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The nucleus dorsalis nervi vagi is marked here with 9. Its fibers can be seen leaving the medulla oblongata at the exit of the vagus nerve.

The nucleus dorsalis nervi vagi is one of four cranial nerve nuclei of the tenth cranial nerve, the vagus nerve , in the brain stem . It represents an important parasympathetic core area .

Location and microscopic structure

The core area lies in the medulla oblongata and borders there medially on the nucleus nervi hypoglossi and laterally on the nucleus tractus solitarii , with which it is also functionally linked. It also borders dorsally on the fourth ventricle and on the longitudinal fasciculus dorsalis (also called Schütz bundle), with which there is also a functional connection. Ventrally, it usually touches part of the solitary tract .

The nucleus is made up of motor neurons that are slightly smaller than those in the neighboring hypoglossal nucleus. In contrast to these, their axons do not directly reach the region to be innervated, but are switched to another neuron in ganglia .

function

As a parasympathetic nucleus, the nucleus dorsalis nervi vagi is general visceromotor . He is responsible for the parasymatic influence of the chest and abdominal organs up to the Cannon-Böhm point . The core area is controlled by afferents from the nucleus tractus solitarii and the hypothalamus , which reach it via the fasciculus longitudinalis dorsalis .

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  • Martin Trepel: Neuroanatomy . Elsevier, Munich 2012. ISBN 978-3-437-41299-8
  • Werner Kahle, Michael Frotscher: Pocket Atlas Anatomy Vol. 3: Nervous system and sensory organs . Thieme, Stuttgart 2009. ISBN 978-3-13-492210-3