By N.E. Lazarov
The publication summarizes our present realizing of the ultrastructure and synaptic association of the mesencephalic trigeminal nucleus (MTN) within the cat in addition to the neurochemistry of its neuronal population.
specific emphasis is given to the survey of synaptic connections and the potential physiological involvement of MTN inputs within the transmission of proprioceptive info. utilizing immunocytochemistry and in situ hybridization
histochemistry we've got pointed out specified neuronal, partially chemically coded MTN subpopulations - huge glutamatergic and smaller GABAergic neurons. We additionally convey that MTN obtain catecholaminergic and peptidergic innervation.
the degrees of transmitter elements differ in keeping with the environmental stipulations hence implying the neurochemical plasticity of MTN neurons.
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The ebook summarizes our present figuring out of the ultrastructure and synaptic association of the mesencephalic trigeminal nucleus (MTN) within the cat in addition to the neurochemistry of its neuronal inhabitants. specific emphasis is given to the survey of synaptic connections and the potential physiological involvement of MTN inputs within the transmission of proprioceptive details.
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Additional info for The Mesencephalic Trigeminal Nucleus in the Cat
15. Electron micrograph showing two G-boutons (G) making synaptic contacts (arrows) with small and large dendrites (D) in the MTN of the cat. The endings contain a mixture of round, oval, and flattened agranular vesicles of the small type as well as a few large, granular vesicles (arrowheads). These synapses often show a symmetrical synaptic density. (Reproduced from Lazarov 1996, with the permission of Swets and Zeitlinger) x30,000 Table 4. Proportional distribution and ultrastructural characteristics of synaptic boutons in the cat MTN.
These boutons are packed with numerous pleomorphic electron-lucent synaptic vesicles and also contain a dense-cored vesicle. The dendrite contacted by these boutons also receives an asymmetric synapse from a non-immunoreactive terminal (asterisk). (Reproduced from Lazarov and Chouchkov 1996, with the permission of Wiley-Liss, a division of John Wiley and Sons) x20,OOO (NADPH-d) activity. 1996). The NADPH-d positive neurons are identified by formazan deposits filling the cell bodies and processes, and their absence in the cell nuclei.
Le, locus coeruleus. x 100 47 Fig. 62. Immuno-EM micrograph showing part of a PV-LI MIN perikaryon (M) with a proximal dendrite (D). PV-positive product is seen to be distributed diffusely in the cytoplasm of the MIN soma. x20,OOO Fig. 63. CB-LI in a large neuronal cell body and some dendritic profiles in the cat MIN. Immunoreactivity is observed throughout the cytoplasm. x3,OOO diffusely localized in the cytoplasm (Fig. 62). Electron-dense reaction product coding for CB is deposited throughout the cytoplasm of the immunopositive soma in MTN cells and their processes (Fig.