| Phenotype: | primary motor neuron axon extension increased process quality, 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: | primary motor neuron |
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| Synonyms: | primary motoneuron |
| Definition: | Motor neurons that arise during the first day of development. Primary motoneurons have larger diameter cell bodies and axons than secondary motoneurons and are positioned more dorsally and medially than secondary motoneurons. Primary motoneurons are present in a single bilateral pair of clusters in each spinal segment and innervate axial muscle fibers in the corresponding pair of myotomes. Axons make a conspicuous loop around the Mauthner axon before entering the ventral root. |
| Ontology: | Anatomy Ontology [ZFA:0009244] |
| Name: | axon extension |
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| Synonyms: | axon extension involved in development |
| Definition: | Long distance growth of a single axon process involved in cellular development. |
| Ontology: | GO: Biological Process [GO:0048675] QuickGO AmiGO |
| Name: | increased process quality |
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| Synonyms: | |
| Definition: | A quality of a process that has a value that is increased compared to normal or average. |
| Ontology: | Phenotypic Quality Ontology [PATO:0002304] |