Uberon definition : The raphe obscurus projects to the cerebellar lobes VI and VII and to crus II along
with the nucleus raphe pontis . This so called obscure nucleus has also been implicated
in the modulation of the hypoglossal nerve. It has been observed that the ablation
of this nucleus causes a change in the firing pattern in the XII nerve . In addition,
the raphe obscurus mediates expiration via the inhibitory effect of serotonin and
depresses periodic synaptic potentials . It has also been shown that this nucleus
stimulates gastrointestinal motor function; microinjections of 5-HT into the n.r.
obscurus increase gastric movement . [WP,unvetted].;
The raphe obscurus projects to the cerebellar lobes VI and VII and to crus II along
with the nucleus raphe pontis . This so called obscure nucleus has also been implicated
in the modulation of the hypoglossal nerve. It has been observed that the ablation
of this nucleus causes a change in the firing pattern in the XII nerve . In addition,
the raphe obscurus mediates expiration via the inhibitory effect of serotonin and
depresses periodic synaptic potentials . It has also been shown that this nucleus
stimulates gastrointestinal motor function; microinjections of 5-HT into the n.r.
obscurus increase gastric movement . [WP,unvetted].