Internal arcuate fibers

Internal arcuate fibers

Infobox Anatomy
Name = PAGENAME
Latin = fibrae arcuatae internae
GraySubject = 187
GrayPage = 782


Caption = 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.


Caption2 = Section of the medulla oblongata at about the middle of the olive. (Arcuate fibers labeled at center right.)
System =
Precursor =
MeshName =
MeshNumber =
DorlandsPre = f_05
DorlandsSuf = 12361842

Internal arcuate fibers are the axons of second-order neurons contained within the gracile and cuneate nuclei of the medulla oblongata.

These fibers cross (decussate) from one side of the medulla to the other to form the medial lemniscus.

Part of the dorsal column-medial lemniscus system (second neuron), the internal arcuate fibers are important for relaying the sensation of fine touch and proprioception to the thalamus and ultimately to the cerebral cortex.

External links

*
* [http://www.indiana.edu/~pietsch/v414output07.html Photo] at indiana.edu


Wikimedia Foundation. 2010.

Игры ⚽ Поможем решить контрольную работу

Look at other dictionaries:

  • Arcuate fibers — can refer to: * Internal arcuate fibers * Anterior external arcuate fibers * Posterior external arcuate fibers …   Wikipedia

  • 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 …   Wikipedia

  • Anterior external arcuate fibers — Infobox Anatomy Name = PAGENAME Latin = fibrae arcuatae externae anteriores GraySubject = 187 GrayPage = 782 Caption = Diagram showing the course of the arcuate fibers. (Testut.) 1. Medulla oblongata anterior surface. 2. Anterior median fissure.… …   Wikipedia

  • arcuate fibers internal — fibrae arcuatae internae …   Medical dictionary

  • Corticopontine fibers — Brain: Corticopontine fibers Coronal section through mid brain. 1. Corpora quadrigemina. 2. Cerebral aqueduct. 3. Central gray stratum. 4. Interpeduncular space. 5. Sulcus lateralis. 6. Substantia nigra. 7. Red nucleus of …   Wikipedia

  • Pontocerebellar fibers — Brain: Pontocerebellar fibers Scheme showing the connections of the several parts of the brain. Latin fibrae pontocerebellares NeuroNames …   Wikipedia

  • Arcuate line of rectus sheath — Linea semicircularis redirects here. It is not to be confused with Linea semilunaris. Arcuate line of rectus sheath The interfoveolar ligament, seen from in front. (Linea semicircularis labeled at center top.) Latin …   Wikipedia

  • Abdominal internal oblique muscle — Muscles of the trunk …   Wikipedia

  • Fiber — The parts of plants that cannot be digested, namely complex carbohydrates. Also known as bulk or roughage. Complex carbohydrates from plants are rich in starch and fiber. Examples of plants that provide complex carbohydrates (fiber) are fresh… …   Medical dictionary

  • Olivocerebellar tract — Brain: Olivocerebellar tract Transverse section of medulla oblongata below the middle of the olive. (Cerebello olivary fibers visible at center right.) Latin t. olivocerebellaris NeuroNames …   Wikipedia

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”