The hypothalamic inferior lobes of 5 species of teleost fishes receive a prominent innervation by calcitonin gene-related peptide (CGRP)-like immunoreactive fibres. At electron microscopic level these contain immunostained dense-cored vesicles, and make synaptic connections with subependymal neurons surrounding the lateral recess. A proportion of the fibres may ascend from gustatory brainstem areas, consistent with a role for the inferior lobes as relay centres for integration of feeding and agressive behaviour.
- Calcitonin gene-related peptide
- Electron microscopy
- Inferior lobe
- Teleost fish