| Term: | spiral neuron axon terminus |
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| 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: | spiral neuron |
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| Synonyms: | |
| Definition: | Spiral neurons are excitatory interneurons located in rhombomere 3 and have contralateral projections that cross the midline forming commissures in rhombomere 3. After crossing the midline the two commissures fuse and project caudally synapsing with the Mauthner neuron. As they enter the axon cap, spiral fiber neurons lose their myelin and wrap around the axon hillock in a stereotyped spiral, where they make both electrical and glutamatergic synapses on the M cell axon close to the M-cell soma and with one another. Spiral neurons produced biphasic excitatory postsynaptic potentials (EPSPs) in the contralateral M-cell with a short latency. |
| Ontology: | Anatomy Ontology [ZFA:0005874] |
| Name: | axon terminus |
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| Synonyms: | axon terminal, axon terminal specialization, motor endplate, nerve ending |
| Definition: | Terminal inflated portion of the axon, containing the specialized apparatus necessary to release neurotransmitters. The axon terminus is considered to be the whole region of thickening and the terminal button is a specialized region of it. |
| Ontology: | GO: Cellular Component [GO:0043679] QuickGO AmiGO |