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The Edinger–Westphal nucleus (accessory oculomotor nucleus) is the parasympathetic pre-ganglionic nucleus that innervates the iris sphincter muscle and the ciliary muscle. Alternatively, the Edinger–Westphal nucleus is a term often used to refer to the adjacent population of non-preganglionic neurons that do not project to the ciliary ganglion, but rather project to the spinal cord, dorsal raphe nucleus, lateral septal nuclei, lateral hypothalamic area and the central nucleus of the amygdala, among other regions 〔.〕 Unlike the classical preganglionic Edinger–Westphal neurons that contain choline acetyltransferase, neurons of the non-preganglionic Edinger–Westphal nucleus contain various neuropeptides, such as Urocortin and cocaine- and amphetamine-regulated transcript. Previously, it had been proposed to rename this group of non-preganglionic, neuropeptide-containing neurons to perioculomotor subgriseal neuronal stream, abbreviated ''pIIISG''. However, more recently, a final nomenclature has been determined. Preganglionic oculomotor neurons within the Edinger–Westphal nucleus shall be referred to as the ''EWpg'', and the neuropeptide-containing neurons shall be known as the centrally-projecting Edinger Westphal nucleus, or ''EWcp''.〔 ==Location== The paired nuclei are posterior to the main motor nucleus (oculomotor nucleus) and anterolateral to the cerebral aqueduct in the rostral midbrain at the level of the superior colliculus. It is the most rostral of the parasympathetic nuclei in the brain stem. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Edinger–Westphal nucleus」の詳細全文を読む スポンサード リンク
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