| Cell type (class) | Nomenclature (Acronym) |
Definition | Relation of non-LTS neuron |
| Annotation | Reference |
Collator |
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| motor neuroendocrine magnocellular neuron | Swanson (Swanson) | Collator note: the large-sized neurons that project to the pituitary gland. | partial correspondence | | Neurons in the PVN lacking detectable LTS potentials (non-LTS neurons) were typically neurophysin-positive and larger than cells of the other two categories. This size characteristic held for the single non-LTS neuron that did not stain positively for neurophysin, its soma diameter (longest axis = 25 micrometers ) being well within the range of other non-LTS cells measured in this study. Most of the non-LTS neurons, including the one not labeled for neurophysin, were recorded in the area generally
described by Swanson and Kuypers ('80) as the posterior magnocellular subdivision and compartmentalized by Armstrong et al. ('80) as the medial and lateral magnocellular subdivisions of the PVN. | Hoffman N.W, Tasker J.G. & Dudek F.E. | Mihail Bota |
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| motor neuroendocrine parvicellular neuron | Swanson (Swanson) | The cell bodies and fiber systems associated with the synthesis and release of hypophysiotropic hormones are referred to collectively as the parvocellular neurosecretory system. | partially corresponds | | Our data suggest that parvocellular neurosecretry neurones in the PVN form a relatively homogeneous electrophysiological group that can be identified on the basis of the lack of expression of both transient outward rectification and an LTS. | Luther J.A., Daftary S.S., Boudaba C., Gould G.C., Halmos K.CS. & Taker J.G. | Mihail Bota |
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| type I PVN neuron | Tasker and Dudek (TD) | Preliminary morphological analysis indicated that type I neurones had relatively large soma diameters (20-30 micrometers, long axis) and only two to three sparsely branched, primary dendrites with dendritic spines (Fig. 13A)....Type I neurones were situated inside the PVN and had electrophysiological properties which were very similar to those of magnocellular neurones of the SON. They had linear I-V relations to very hyperpolarized membrane potentials, much like SON neurones (Mason, 1983; Bourque & Renaud, 1985a). Type I neurones often displayed, in response to depolarizing pulses, a delayed onset to spike firing caused by a hyperpolarizing 'notch' in the membrane potential, as well as a delayed return to baseline of the membrane potential following hyperpolarizing pulses; these properties closely resembled those associated with a putative A-current described in SON magnocellular neurones (Randle, Bourque & Renaud, 1986a; Bourque, 1988). The bursting characteristics of some type I cells were similar to the phasic firing behaviour described for vasopressinergic magnocellular neurones in vivo and in vitro (see Poulain & Wakerley, 1982; Dudek, Tasker & Wuarin, 1989). | synonim | | Non-LTS neurons conformed to the previous type-I classification (Tasker and Dudek, '91), since they lacked low-threshold potentials, had linear I-V relations and showed evidence for a pronounced A current (Fig. 1). | Hoffman N.W, Tasker J.G. & Dudek F.E. | Mihail Bota |
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