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Distribution of monoamine‐containing neurons in the brain stem of the frog, Rana temporaria
Author(s) -
Parent A.
Publication year - 1973
Publication title -
journal of morphology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.652
H-Index - 74
eISSN - 1097-4687
pISSN - 0362-2525
DOI - 10.1002/jmor.1051390105
Subject(s) - rana , tegmentum , biology , catecholamine , anatomy , midbrain , medulla oblongata , lateral recess , monoamine neurotransmitter , bullfrog , central nervous system , neuroscience , serotonin , endocrinology , biochemistry , receptor , lumbar
The distribution of monoamine (catecholamine and 5‐hydroxytryptamine)‐containing nerve cell bodies in the brain stem and hypothalmus of the frog ( Rana temporaria ) was investigated with the help of the histofluorescence technique of Falck and Hillarp ('62). At the level of the hypothalmus of this amphibian brain, catecholamine‐containing nerve cell bodies are found mainly within three areas of the periventricular gray substance, namely the peroptic recess organ, the paraventricular organ and the lateral recess region. On the other hand, most of the 5‐hydroxytryptamine (serotonin)‐containing nerve cell bodies of the brain stem of Rana temporaria appear to be concentrated within the midbrain tegmentum. This huge mesencephalic nerve cell collection can be subdivided into medial and lateral groups. More caudally, at the level of the isthmic tegmentum, another group of 5‐hydroxytryptamine‐containing perikarya located close to the midline, within the so‐called raphae region, is clearly outlined. The latter group of neurons extends caudally as far as the level of the medulla oblongata. In addition, a small group of catecholamine‐containing nerve cell bodies is also found in the ventromedial portion of the rostral midbrain tegmentum, whereas a few other catecholamine type neurons are scattered throughout the lower brain stem of the frog and more especially near the ependymal wall of the fourth ventricle. As a whole, the 5‐hydroxytryptamine‐containing neuronal systems of the brain stem of Rana temporaria are much more elaborated than the catecholamine neuronal systems of the same structure.