| 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 side |
|---|---|
| Synonyms: | ventral |
| Definition: | An anatomical region that is the entire part of an anatomical structure ventral to a horizontal plane and bounded on one side by the same horizontal plane. |
| Ontology: | Spatial Ontology [BSPO:0000068] |