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Fig. 4. Immunohistochemical staining of NPR-A in eel brain counterstained with
Haematoxylin (left) and corresponding cross-sectional planes (right). (A)
Immunoreactive signal in capillaries of whole brain area as represented by the
olfactory bulb (OB). (B) Immunoreactive neurons in reticular formation (RF),
(C) glossopharyngeal-vagal motor complex (GVC), and (D) area postrema (AP) and
commissural nucleus of Cajal (NCC) in the medulla oblongata. Approximate areas
photographed are indicated by broken squares drawn in cross sectional planes.
Regions indicated by arrowheads are magnified and shown in the boxed areas at
the bottom of each photograph. Scale bar, 50 µm (magnified view, 30 µm).
Locations of cross sectional planes are shown in
Fig. 1. NSO, spino-occipital
motor nucleus; IV, fourth ventricle.