Biomaterial Database

Monoaminergic systems of the hypothalamus of ten amphibian species: a histofluorescence study. 1988

J Lamas, and C Rodicio, and H Caruncho, and R Anadon

Departamento de Biologia Fundamental, Facultad de Biologia, Universidad de Santiago de Compostela, Spain.

The morphological features and distribution of monoamine (MA) containing neurons in the hypothalamus of ten amphibian species have been studied using two histofluorescence methods. Three hypothalamic MA containing nuclei were demonstrated in all species: preoptic recess organ (PRO), paraventricular organ (PVO) and nucleus infundibularis dorsalis (NID), all three composed of liquor-contacting (LC) and accompanying MA neurons. The PRO, more developed in anuran species, shows LC neurons of variable morphology among species which are arranged in layers bordering the preoptic recess. In anurans the PRO extends into the walls of the unpair telencephalic ventricle. The PVO, well developed in all amphibians studied, has bipolar LC neurons with sometimes branched apical dendrites and basal axons. The NID is fairly well developed and better delimited from the PVO in urodeles than in anurans. MA containing fibres of the hypothalamus are specially abundant in the lateral forebrain bundle and the lateral area of the PVO.

UI	MeSH Term	Description	Entries
D007031	Hypothalamus	Ventral part of the DIENCEPHALON extending from the region of the OPTIC CHIASM to the caudal border of the MAMMILLARY BODIES and forming the inferior and lateral walls of the THIRD VENTRICLE.	Lamina Terminalis,Preoptico-Hypothalamic Area,Area, Preoptico-Hypothalamic,Areas, Preoptico-Hypothalamic,Preoptico Hypothalamic Area,Preoptico-Hypothalamic Areas
D009412	Nerve Fibers	Slender processes of NEURONS, including the AXONS and their glial envelopes (MYELIN SHEATH). Nerve fibers conduct nerve impulses to and from the CENTRAL NERVOUS SYSTEM.	Cerebellar Mossy Fibers,Mossy Fibers, Cerebellar,Cerebellar Mossy Fiber,Mossy Fiber, Cerebellar,Nerve Fiber
D002395	Catecholamines	A general class of ortho-dihydroxyphenylalkylamines derived from TYROSINE.	Catecholamine,Sympathin,Sympathins
D006651	Histocytochemistry	Study of intracellular distribution of chemicals, reaction sites, enzymes, etc., by means of staining reactions, radioactive isotope uptake, selective metal distribution in electron microscopy, or other methods.	Cytochemistry
D000663	Amphibians	VERTEBRATES belonging to the class amphibia such as frogs, toads, newts and salamanders that live in a semiaquatic environment.	Amphibia,Amphibian
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D013045	Species Specificity	The restriction of a characteristic behavior, anatomical structure or physical system, such as immune response; metabolic response, or gene or gene variant to the members of one species. It refers to that property which differentiates one species from another but it is also used for phylogenetic levels higher or lower than the species.	Species Specificities,Specificities, Species,Specificity, Species