subfornical organ(redirected from intercolumnar tubercle)
sub·for·ni·cal or·gan (SFO),
the intercolumnar tubercle. One of the circumventricular organs., SFO has fenestrated capillaries and is outside the blood-brain barrier. It is thought to be a chemoreceptor zone involved in cardiovascular regulation.
Synonym(s): organum subfornicale [TA]
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