within midbrain/caudal brainstem regions , the area ventralis-tsai sends afferents to hy and ep and multiple projections upon the latter in addition to the pn site originate in ipsilateral : zona perinervus oculomotorius , the lateral and medial mesencephalic reticular formation , n. tegmenti pedunculo-pontinus pars compacta and bilateral : zona peri-fasciculus longitudinalis medialis , substantia grisea centralis , n. locus coeruleus , n. annularis , n. linearis caudalis .
C0025462
midbrain
C0006121
brainstem