| Name: | midbrain hindbrain boundary | 
|---|---|
| Synonyms: | isthmus, mhb, midbrain-hindbrain boundary | 
| Definition: | The boundary between the mesencephalon and the rhombencephalon. | 
| Ontology: | Anatomy Ontology [ZFA:0000042] | 
| Name: | proliferative region | 
|---|---|
| Synonyms: | cell cycle, cell division, proliferation | 
| Definition: | Anatomical cluster which consists of rapidly dividing cells. | 
| Ontology: | Anatomy Ontology [ZFA:0000098] |