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Fig. 1. Depicts the major CRH-ir cells groups and CRH-ir pathways in a sagittal
section of the brain of tilapia (original data in Pepels et al.,
2002a,
2004). Each circle represents
approximately 25 CRH-ir cells. The hypophysiotropic CRH-ir neurons located in
the nucleus preopticus (npo), nucleus recessus lateralis (nrl) and nucleus
lateralis tuberis (nlt) project into the pituitary (pit). The largest CRH-ir
cell group is found in the lateral part of the ventral telencephalon (Vl) and
projects mainly into the anterior subdivision of the lateral part of the
dorsal telencephalon (Dla). CRH-ir terminals have also been found locally in
Vl. Many blood capillaries are found in close proximity of the CRH-ir cells in
Vl and a collecting vein is located in the sulcus of Vl
(Pepels et al., 2004). In the
vagal lobe (LX) CRH-ir terminals are present.