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Ultrastructural Study of Ascending Projections to the Lateral Mammillary Nucleus of the Rat by Tetsu Hayakawa; Katuya Zyo is a Neuroscience article available to read on EtoBox.

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We examined the synaptic organization of ascending projections from the pars ventralis of the dorsal tegmental nucleus of Gudden (TDV) and the laterodorsal tegmental nucleus to the lateral mammillary nucleus (LM). The LM neuropil consists of terminals containing pleomorphic synaptic vesicles and forming symmetric synaptic contact, and terminals containing round synaptic vesicles and forming asymmetric synaptic contact. They make up 63% and 37%, respectively, of all axodendritic terminals. All axosomatic terminals contain pleomorphic vesicles and make symmetric contact. Following injection of WGA-HRP into the TDV, many anterogradely labeled terminals and retrogradely labeled cells are found in the LM. Labeled terminals contact mainly proximal (more than 2 gm diameter) and intermediate (1-2 gm diameter) dendrites. Serial ultrathin sections of the LM show that 55% of axosomatic terminals are labeled anterogradely. Following injection of WGA-HRP into the laterodorsal tegmental nucleus, many anterogradely labeled terminals are found in the LM, but no retrogradely labeled cells are present. Labeled terminals contact mainly distal (less than 1 gm diameter) and intermediate dendrites as we

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Author

Tetsu Hayakawa; Katuya Zyo

Publisher

Springer; Springer-Verlag; Springer Verlag; J.F. Bergmann; Springer Science and Business Media LLC; Society for Mining, Metallurgy and Exploration Inc. (ISSN 0340-2061)

Published

1992

Language

EN

Field

Neuroscience (Life Sciences)