part of
area postrema
A small, elevated area in the lateral wall of the inferior recess of the fourth ventricle; one of the few loci in the brain where the blood-brain barrier is lacking; a chemoreceptor area associated with vomiting. A tongue-shaped structure in the caudal region of the fourth ventricle of the brain.
BTO:0003425
BrendaTissueOBO
fourth ventricle
circumventricular organ