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Neurochemistry of the mammillary body

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BRAIN STRUCTURE & FUNCTION
卷 228, 期 6, 页码 1379-1398

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SPRINGER HEIDELBERG
DOI: 10.1007/s00429-023-02673-4

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Mammillary body; Neuropeptides; Neurotransmitters; Rat

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This paper aims to review the distribution of various substances in the mammillary body (MB) of rats and describe their possible physiological roles, in order to enhance understanding of the MB functions and its complex relations with other structures of the extended hippocampal system.
The mammillary body (MB) is a component of the extended hippocampal system and many studies have shown that its functions are vital for mnemonic processes. Together with other subcortical structures, such as the anterior thalamic nuclei and tegmental nuclei of Gudden, the MB plays a crucial role in the processing of spatial and working memory, as well as navigation in rats. The aim of this paper is to review the distribution of various substances in the MB of the rat, with a description of their possible physiological roles. The following groups of substances are reviewed: (1) classical neurotransmitters (glutamate and other excitatory transmitters, gamma-aminobutyric acid, acetylcholine, serotonin, and dopamine), (2) neuropeptides (enkephalins, substance P, cocaine- and amphetamine-regulated transcript, neurotensin, neuropeptide Y, somatostatin, orexins, and galanin), and (3) other substances (calcium-binding proteins and calcium sensor proteins). This detailed description of the chemical parcellation may facilitate a better understanding of the MB functions and its complex relations with other structures of the extended hippocampal system.

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