| 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: | anatomical region | 
|---|---|
| Synonyms: | |
| Definition: | A 3D region in space without well-defined compartmental boundaries; for example, the dorsal region of an ectoderm. | 
| Ontology: | Spatial Ontology [BSPO:0000070] |