| Name: | optic chiasm |
|---|---|
| Synonyms: | chiasma opticum, optic commissure |
| Definition: | Decussation of cranial nerve II axons whereby the retinal axons cross the midline, projecting contralaterally through the optic tract. |
| Ontology: | Anatomy Ontology [ZFA:0000556] |
| Name: | myelin sheath |
|---|---|
| Synonyms: | astrocyte sheath, oligodendrocyte myelin sheath, Schwann cell myelin sheath |
| Definition: | An electrically insulating fatty layer that surrounds the axons of many neurons. It is an outgrowth of glial cells: Schwann cells supply the myelin for peripheral neurons while oligodendrocytes supply it to those of the central nervous system. |
| Ontology: | GO: Cellular Component [GO:0043209] QuickGO AmiGO |