| Cell type (class) | Nomenclature (Acronym) |
Definition | Relation of BNSTALG Type II neuron |
| Annotation | Reference |
Collator |
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| BNSTAL-5HT neuron | Hammack et al. (Hammack) | In agreement with McDonald (1983), neurons of the BNSTAL had a characteristic oval soma (approximately 22 X 15 micrometers) from which emanated two to four primary spine-sparse dendrites. The length of the primary dendrites ranged from 126
to 50 micrometers. Unfortunately, full morphometric reconstruction on several of the recovered cells was not possible due to the loss of some of the dendritic arbor during tissue processing. Collator note: the distribution of these neurons are shown in a single figure (Fig.1 page 586). It was assumed that BNSTAL of Levita et al. may correspond with the rostral levels of BSTal and BSTad of Swanson-1998 (Atlas Levels 16-17). It is possible that BSTov is also included in the BNSTAL of Levita et al., but no indication of this was found in the text. | partial correspondence | | Collator note: see Figure 8 page 1796. Each physiological type BNSTALG is related to several types of the electro-chemical 5HT types. | Guo J.-D., Hammack S.E., Hazra R., Levita L.& Rainnie D.G. | Mihail Bota |
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| BNSTAL-5HT (HYP) neuron | Hammack et al. (Hammack) | Collator note: neuron type defined on the physiological response when serotonin is applied in BNSTALG tissue.5-HT(Hyp) always has a hyper-polarization response. The distribution of this neuron type (population) is assumed to be within the boundaries of BNSTAL as defined in Levita et al. 2004. | partial correspondence | | Collator note: see Figure 8 page 1796. Each physiological type BNSTALG is related to several types of the electro-chemical 5HT types. | Guo J.-D., Hammack S.E., Hazra R., Levita L.& Rainnie D.G. | Mihail Bota |
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| BNSTAL-5HT (HYP-DEP) neuron | Hammack et al. (Hammack) | Collator note: neuron type defined on the physiological response when serotonin is applied in BNSTALG tissue.5-HT(Hyp-Dep) has two components, that is, a membrane hyperpolarization immediately followed by a depolarization deflection. The distribution of this neuron type (population) is assumed to be within the boundaries of BNSTAL as defined in Levita et al. 2004. | partial correspondence | | Collator note: see Figure 8 page 1796. Each physiological type BNSTALG is related to several types of the electro-chemical 5HT types. | Guo J.-D., Hammack S.E., Hazra R., Levita L.& Rainnie D.G. | Mihail Bota |
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| BNSTAL-5HT(DEP) neuron | Hammack et al. (Hammack) | Collator note: neuron type defined on the physiological response when serotonin is applied in BNSTALG tissue.5-HT(Dep) always has a depolarization response. The distribution of this neuron type (population) is assumed to be within the boundaries of BNSTAL as defined in Levita et al. 2004. | partial correspondence | | Collator note: see Figure 8 page 1796. Each physiological type BNSTALG is related to several types of the electro-chemical 5HT types. | Guo J.-D., Hammack S.E., Hazra R., Levita L.& Rainnie D.G. | Mihail Bota |
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| spiny bipolar neuron | Larriva-Sahd (Larriva-Sahd) | The most frequent neuronal type found in the Ju is a spiny bipolar cell that accounts for about 78% of the impregnated neurons (Figs. 2, neurons a and e; 3A, neuron b; 4C; 5A). In sagittal sections, the dendritic arborization of these neurons corresponds to that of typical bipolar neurons; the paired primary dendrites run in opposite directions, generating narrow dendritic fields, as defined by Peters (1984) and Peters and Jones (1984), that extend through the dorsoventral extent of the Ju. The somata and proximal dendrites of bipolar neurons tend to be located within the middle one-third of the Ju, as depicted in horizontal sections (Fig. 2, inset). These bipolar neurons correspond to the cell type “restricted to the confines of this small region,” described by
McDonald (1983), and appear to represent the main projection cell of the nucleus (see below). The somata of these neurons are most frequently oval, with smooth contours; however, some somata display irregular indentations and a few spine-like protrusions (Fig. 3A). Two or three primary dendrites run vertically in opposite directions from the soma. An additional primary dendrite can originate from the caudal aspect of the soma. | partial correspondence | | Collator note: Type II neurons appear to be distributed over several anterior BST regions. We chose "overlap" relationship, because no systematic study was made to unequivocally map this neuron-type over the possible morphological types. Moreover, the bipolar neurons can be further subdivided in several subtypes, depending on the route of their axons. See also Larriva-Sahd, 2004. | Hammack S.E., Mania E. & Rainnie D.G. | Mihail Bota |
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| superficial spiny neuron | Larriva-Sahd (Larriva-Sahd) | The lateral part of the shell of the Ov contains a distinct layer of spiny neurons (Fig. 7A). Somata of SSNs are ovoid or triangular, measuring 18–25 micrometers in the longest axis. Primary dendrites have two or three short branches that run divergently.
Within 10–40 micrometers, primary branches ramify, supplying long (i.e., secondary) dendrites that, in turn, provide occasional short terminal dendrites. Secondary and tertiary dendrites display varicosities and are covered by numerous spines. Frequently, terminal dendrites ascending dorsally terminate as a series of two to four spherical or elliptical swellings measuring 2–5 micrometers wide, united by narrow dendritic bridges, similar to those described by Sotelo and Palay (1968) in neurons from the lateral vestibular nucleus. The lenticular dendritic fields of SSN lie in the lateral part of the shell of the Ov. Hence, SSNs are best depicted from sagittal sections through the lateral part of the Ov (Fig. 7A). The axon of the SSN originates from the soma or at the base of a primary dendrite, without modifying its contour. Characteristically, the axon follows an undulating trajectory, providing short collaterals to the neuropil adjacent to the neuron’s own dendritic field. The main synaptic targets of SNN appear to be spiny
projection neurons (Table 2), adjacent interneurons, and distal dendritic processes of neurons lying in the core of the Ov. | partial correspondence | | Collator note: Type II neurons appear to be distributed over several anterior BST regions. We chose "overlap" relationship, because no systematic study was made to unequivocally map this neuron-type over the possible morphological types. See also Larriva-Sahd, 2006 | Hammack S.E., Mania E. & Rainnie D.G. | Mihail Bota |
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