Term: midbrain ventral region
Name: midbrain
Synonyms: mesencephalon
Definition: The brain region between the forebrain anteriorly and the hindbrain posteriorly, including the tectum dorsally and the midbrain tegmentum ventrally.
Ontology: Anatomy Ontology [ZFA:0000128]

Name: ventral region
Synonyms:
Definition: Anatomical region ventrally located on the body or body part.
Ontology: Spatial Ontology [BSPO:0000084]