Posterior external arcuate fibers
You don't need to be Editor-In-Chief to add or edit content to WikiDoc. You can begin to add to or edit text on this WikiDoc page by clicking on the edit button at the top of this page. Next enter or edit the information that you would like to appear here. Once you are done editing, scroll down and click the Save page button at the bottom of the page.
| Posterior external arcuate fibers | |
|---|---|
 | |
| Diagram showing the course of the arcuate fibers. (Testut.) 1. Medulla oblongata anterior surface. 2. Anterior median fissure. 3. Fourth ventricle. 4. Inferior olivary nucleus, with the accessory olivary nuclei. 5. Gracile nucleus. 6. Cuneate nucleus. 7. Trigeminal. 8. Inferior peduncles, seen from in front. 9. Posterior external arcuate fibers. 10. Anterior external arcuate fibers. 11. Internal arcuate fibers. 12. Peduncle of inferior olivary nucleus. 13. Nucleus arcuatus. 14. Vagus. 15. Hypoglossal. | |
 | |
| Section of the medulla oblongata at about the middle of the olive. (Arcuate fibers labeled at center right.) | |
| Latin | fibrae arcuatae externae posteriores |
| Gray's | subject #187 783 |
| Dorlands/Elsevier | f_05/12361829 |
The posterior external arcuate fibers (dorsal external arcuate fibers) take origin in the gracile and cuneate nuclei; they pass to the inferior peduncle of the same side.
It is uncertain whether fibers are continued directly from the gracile and cuneate fasciculi into the inferior peduncle.
The term "cuneocerebellar tract" is sometimes used to collectively refer to the posterior external arcuate fibers.[1]
Contents |
See also
References
Additional images
 Dissection of brain-stem. Lateral view. |
 Deep dissection of brain-stem. Lateral view. |
 Dissection of brain-stem. Dorsal view. |
External links
- NeuroNames hier-793 - dorsal external arcuate fibers
- NeuroNames hier-800 - cuneocerebellar tract
This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.
