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  • Title: Light and electron microscopical localisation of 5-HT-immunoreactive boutons in the rat trigeminal motor nucleus.
    Author: Saha S, Appenteng K, Batten TF.
    Journal: Brain Res; 1991 Sep 13; 559(1):145-8. PubMed ID: 1782554.
    Abstract:
    We have used pre-embedding EM immunohistochemical methods to obtain quantitative data on the frequency and post-synaptic targets of 5-hydroxytryptamine-immunoreactive (5-HT-IR) boutons within the rat V motor nucleus. Thirteen percent (69/531) of all synaptic contacts in the motor nucleus involved 5-HT-IR boutons. Seventy-four percent of 5-HT-IR boutons made axo-dendritic contacts, 20% axo-somatic contacts, and 6% axo-axonic contacts. We conclude that a significant fraction of boutons in the motor nucleus are 5-HT-IR and most contribute to postsynaptic rather than presynaptic effects on trigeminal motoneurones.
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