| Phenotype: | hindbrain has fewer parts of type T interneuron, abnormal |
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| Note: | This statement combines anatomy and/or ontology terms with phenotype quality terms to create a complete phenotype (EQ) statement. For detailed information on individual terms, click the hyperlinked term name. |
| Name: | hindbrain |
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| Synonyms: | rhombencephalon |
| Definition: | The most posterior of the three principal regions of the brain. In mammals and birds the hindbrain is divided into a rostral metencephalon and a caudal myelencephalon. In zebrafish, with the exception of the cerebellum, the ventral remainder of the metencephalon can be separated only arbitrarily from the more caudal myelencephalic portion of the medulla oblongata and thus these are not distinguished here. From Neuroanatomy of the Zebrafish Brain. |
| Ontology: | Anatomy Ontology [ZFA:0000029] |
| Name: | has fewer parts of type |
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| Synonyms: | decreased number of, has decreased number of, has fewer physical parts of type |
| Definition: | The bearer of this quality has_part < n AND has_part > 0 of the indicated entity type, where n is the normal amount for a comparable organism. Note that the bearer of the quality is the whole, not the part. Formally: If a bearer entity e has fewer parts of type X at time t, then the number of instances x of X at t such that x part_of e is < n, where n is either the normal number for comparable entities, or n is stated explicitly. |
| Ontology: | Phenotypic Quality Ontology [PATO:0002001] |
| Name: | T interneuron |
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| Synonyms: | cranial relay neuron, T shaped reticular neuron, t-interneuron |
| Definition: | TARGET DEFINITION: Hindbrain interneurons that are part of the reticular formation. The T interneurons receive synaptic input from the Mauthner neuron, from unidentified axons in the mlf, and perhaps from trigeminal sensory fibers. . The axon is T-shaped the proximal segment courses to the midline of the brain and near the midline bifurcates to form an ascending rostral segment and a descending caudal segment. The rostral and caudal segments join the dorsal component of the MLF. The T interneurons are located caudal to CaD and appear to be bilaterally paired. They project to cranial and pectoral motor nuclei. |
| Ontology: | Anatomy Ontology [ZFA:0005815] |