What rhymes with solitary nucleus?
soli·ta·ry nu·cle·us

In the human brain, the solitary nucleus is a series of nuclei forming a vertical column of grey matter embedded in the medulla oblongata. Through the center of the NTS runs the solitary tract, a white bundle of nerve fibers, including fibers from the facial, glossopharyngeal and vagus nerves that synapse on neurons of the NTS. The NTS projects to, among other regions, the reticular formation, parasympathetic preganglionic neurons, hypothalamus and thalamus, forming circuits that contribute to autonomic regulation. Cells within the NTS are arranged according to function; for instance, cells involved in taste are located in the higher, more forward part, while those regulating cardio-respiratory processes are found in the lower, more posterior part.

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