Corpus: Edinger-Westphal nucleus
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from Latin: nucleus - nucleus, oculus - eye
Synonyms: Edinger-Westphal nucleus, Edinger-Westphal nucleus, nucleus accessorius nervi oculomotorii
English:
Definition[Bearbeiten]
The nucleus oculomotorius accessorius is an accessory nucleus of the III. cranial nerve (oculomotor nerve) in the mesencephalon, from which the preganglionic parasympathetic fibres run to the eye.
Anatomy[Bearbeiten]
The paired nucleus oculomotorius accessorius lies anterolateral to the aqueductus cerebri in the rostral area of the midbrain, approximately at the level of the superior colliculi. It is the most rostrally located parasympathetic nucleus.
Function[Bearbeiten]
The nucleus oculomotorius accessorius controls pupil constriction (miosis) via the sphincter pupillae muscle, as well as accommodation of the lens by the ciliary muscle.