Summary
Generally speaking, the pontomesencephalic region which surrounds the brachia conjunctiva cannot be subdivided into well-outlined nuclei. The only exceptions to the rule are the nuclei lemnisci lateralis and trigeminalis principalis, the colliculus inferior and, with certain reservations, the locus coeruleus and the griseum centrale. No objective justification can be invoked to reject the encompassing term “tegmentum”. However, for purposes of precise description and localization, a parcellating nomenclature, mostly based on topographical relationships, has been proposed. Thus, the peribrachial diffuse tegmental regions include: (a) the tegmentum peribrachiale caudale, (b) the tegmentum cuneiforme, (c) the tegmentum suprabrachiale, (d) the tegmentum entobrachiale, and (e) the locus coeruleus. Other neighbour areas, less closely related to the brachium, have also been located and designated. Amongst the fiber systems which may contain afferent or efferent connexions for the locus coeruleus, the following have been identified and described: (a) the brachium conjunctivum, (b) Probst's bundle, (c) the fasciculus longitudinalis lateralis, (d) the fasciculus entobrachialis, and (e) the fasciculus tegmento-thalamicus.
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Ramon-Moliner, E., Dansereau, J.A. The peribrachial region of cat. Cell Tissue Res. 149, 173–190 (1974). https://doi.org/10.1007/BF00222272
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DOI: https://doi.org/10.1007/BF00222272