area postrema

Function

• it contains among other things chemoreceptors associated with vomiting

Structure

• the area postrema is a small, elevated area in the lateral wall of the inferior recess of the 4th ventricle
• it is one of the few CNS structures with fenestrated endothelium, thus representing a break in the blood-brain barrier

More general terms

• circumventricular organ
• brainstem structure

Component of

• medulla oblongata

Components

• chemoreceptor trigger zone (CTZ)