Parabrachial Nucleus Medial Division
abbreviation: PBm
Abbreviation
PBm
Species
Rat
Description of part
PBm is composed of a population of neurons which are heterogeneous with respect to size and morphology (see Fig. 5). Average cell diameters range from 8 to 19 micrometers. Morphologically, 3 cell types can be defined (Fig. 4B). A population of small lightly-staining round cells, about 12 micrometers mean average diameter, are found primarily in the caudal two-thirds of the nucleus. These are readily distinguished from a smaller population of a larger, more darkly-staining fusiform or multipolar cells, about 17 micrometers in mean average diameter, which tend to lie in a horizontal orientation. These neurons are also found in the caudal two-thirds of the nucleus, but are concentrated along the ventrolateral border of PBm. Finally, a medium-sized population of polygonal neurons, about 14 micrometers in mean average diameter, is found scattered throughout the rostral two-thirds of PBm. These cells are further distinguished by possessing a more prominent nucleolus than the other neurons of PBm.
Part type
gray matter
Nomenclature
Moga-Fulwiler-Saper
Endorsement
The approach used by the collator Mihail Bota is not endorsed by the author of the nomenclature.
