microinjections of 5'-n-ethylcarboxamidoadenosine ( neca ) , an adenosine analog , were made into the medial region of the caudal nucleus tractus solitarius ( nts ) at the level of the caudal tip of the area postrema , an area of the nts in which there is known to be a functional co-existence of cardiovascular and respiratory-related neuronal elements .
C0050789
n-ethylcarboxamidoadenosine
C0001443
adenosine