Locus Coeruleus - ț̢
Bluish region in the superior angle of the fourth ventricle floor, corresponding to melanin-like pigmented nerve cells which lie lateral to the ponto-mesencephalic central gray (griseum centrale). It is also known as nucleus pigmentosus pontis.
Synonyms : Locus Caeruleus, Locus Ceruleus, Nucleus Pigmentosus Pontis, Pontis, Nucleus Pigmentosus