Term: primary motor neuron axonogenesis
Note: This page represents a term created by the combination ("post-composition") of two ontology terms. For more information on the individual terms, click the hyperlinked name.
Name: primary motor neuron
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: axonogenesis
Synonyms: axon growth, axon morphogenesis, neuron long process generation
Definition: De novo generation of a long process of a neuron, including the terminal branched region. Refers to the morphogenesis or creation of shape or form of the developing axon, which carries efferent (outgoing) action potentials from the cell body towards target cells.
Ontology: GO: Biological Process [GO:0007409]   QuickGO   AmiGO