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Terminal Degeneration in the Lateral Septum of the Rat after Suprachiasmatic Nucleus Lesion
Author(s) -
Ogata Ryo,
Ikari Koichi,
Matsushima Michihito
Publication year - 1982
Publication title -
psychiatry and clinical neurosciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.609
H-Index - 74
eISSN - 1440-1819
pISSN - 1323-1316
DOI - 10.1111/j.1440-1819.1982.tb00267.x
Subject(s) - terminal (telecommunication) , suprachiasmatic nucleus , degeneration (medical) , lesion , neuroscience , nucleus , neuronal degeneration , anatomy , biology , medicine , hypothalamus , pathology , computer science , telecommunications , disease
Nerve terminals in the lateral septum were studied by electron microscopy in the rat after lesions of the suprachiasmatic nuclei (SCN). The results were as follows: 1) The electron‐lucent degenerations showed a reduction in the number of vesicles and the swelling of terminals and/or vesicles. These degenerating terminals predominated at two days of survival period. The electron‐dense degenerations which showed a darkening and shrinkage of the terminals mainly appeared at four days of survival period. 2) Most of the degenerating terminals contained large core vesicles of a diameter in the range of 800–1500 A. 3) The percentage of the degenerating terminals to all the terminals on the electron micrographs was about 7%. 4) The F‐type synapses were not found in the lateral septum of the normal and SCN lesion rats. These data confirmed the existence of the projection which reached the lateral septum from the SCN and suggested to us that these synapses were so‐called peptidergic synapses.