Nucleus nervi abducentis

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Scheme of the cranial nerve nuclei, No. 6 is the abducent nucleus

The abducens nucleus (Syn. Motor nucleus of vagus abducentis , abducens nucleus ) is an existing on both sides of the core area ( nucleus ) in the pontine tegmentum from which the Abducens ( cranial nerve VI) proceeds. Together with the nucleus nervi oculomotorii , the Edinger-Westphal nucleus, and the nucleus nervi trochlearis, it belongs to the ocular muscle nuclei that are connected to one another via the medial longitudinal bundle ( Fasciculus longitudinalis medialis ).

The nucleus nervi abducentis is located in the brain stem in the area of ​​the diamond pit at the floor of the fourth cerebral ventricle . Together with the inner knee of the facial nerve , it arches the rostral floor of the rhombus pit slightly forward ( colliculus facialis ).

The cholinergic efferents of the nucleus nervi abducentis run at the base of the brainstem as the abducens nerve to the ipsilateral rectus lateralis muscle . In addition, there are crossing glutameric neurons to the nucleus nervi abducentis on the opposite side, which rise contralaterally to the nucleus nervi oculomotorii and end monosynaptically at the nerve cells for the muscle rectus medialis . Finally, there are projections to the flocculus of the cerebellum .

The nucleus nervi abducentis receives afferents from the formatio reticularis and the vestibular nuclei . Vestibulo-ocular reflexes are conveyed via the latter .

See also

literature

  • Peter P. Urban: Diseases of the brain stem: Clinic - Diagnostics - Therapy . Schattauer Verlag 2008, ISBN 978-3-7945-2478-5 , pp. 9-10.