interpeduncular fossa
{{Short description|Brain segment}}
{{Infobox brain
| Name = Interpeduncular fossa
| Latin = fossa interpeduncularis
| Image = Gray724.png
| Caption = Base of brain
| Image2 = Cn3nucleus-en.svg
| Caption2 = Section through superior colliculus showing path of oculomotor nerve (interpeduncular fossa not labeled, but visible at bottom center)
| IsPartOf =
| Components =
| Artery =
| Vein =
| Acronym =
}}
The interpeduncular fossa is a deep depression of the ventral surface of the midbrain between the two cerebal crura.{{Citation |last=Basinger |first=Hayden |title=Neuroanatomy, Brainstem |date=2022 |url=http://www.ncbi.nlm.nih.gov/books/NBK544297/ |work=StatPearls |place=Treasure Island (FL) |publisher=StatPearls Publishing |pmid=31335017 |access-date=2022-08-08 |last2=Hogg |first2=Jeffery P.}}{{Cite web |title=fossa interpeduncularis |url=https://medical-dictionary.thefreedictionary.com/fossa+interpeduncularis |access-date=2022-08-08 |website=TheFreeDictionary.com}}{{Cite book |url=https://www.worldcat.org/oclc/1201341621 |title=Gray's anatomy : the anatomical basis of clinical practice |date=2021 |others=Susan Standring |isbn=978-0-7020-7707-4 |edition=42nd |location=[New York] |pages=456–459 |oclc=1201341621}} It has been found in humans and macaques, but not in rats or mice, showing that this is a relatively new evolutionary region.{{Cite web |title=BrainInfo |url=http://braininfo.rprc.washington.edu/centraldirectory.aspx?ID=489 |access-date=2019-04-03 |website=braininfo.rprc.washington.edu}}
Structure
The interpeduncular fossa is a somewhat rhomboid-shaped area of the base of the brain.{{Cite web |title=Interpeduncular fossa |url=https://www.imaios.com/en/e-Anatomy/Anatomical-Parts/Interpeduncular-fossa |access-date=2019-04-03 |website=IMAIOS |language=en}}
= Features =
The lateral wall of the interpeduncular fossa bears a groove - the oculomotor sulcus - from which{{Cite web |title=sulcus of the oculomotor nerve |url=https://medical-dictionary.thefreedictionary.com/sulcus+of+the+oculomotor+nerve |access-date=2022-08-08 |website=TheFreeDictionary.com}} rootlets of the oculomotor nerve emerge from the substance of the brainstem and aggregate into a single fascicle.
= Anatomical relations =
The ventral tegmental area lies at the depth of the interpeduncular fossa.
==== Boundaries ====
The interpeduncular fossa is in front by the optic chiasma, behind by the antero-superior surface of the pons, antero-laterally by the converging optic tracts, and postero-laterally by the diverging cerebral peduncles.
The floor of interpeduncular fossa, from behind forward,{{Citation needed|date=August 2022}} are the posterior perforated substance, corpora mamillaria, tuber cinereum, infundibulum, and pituitary gland.{{Citation needed|date=August 2022}}
== Contents ==
Contents of interpeduncular fossa include oculomotor nerve, and circle of Willis.{{Citation needed|date=August 2022}}
The basal veins pass alongside the interpeduncular fossa before joining the great cerebral vein.{{Cite book |url=https://www.worldcat.org/oclc/1201341621 |title=Gray's anatomy : the anatomical basis of clinical practice |date=2021 |page=422|others=Susan Standring |isbn=978-0-7020-7707-4 |edition=42nd |location=[New York] |pages= |oclc=1201341621}}
Clinical significance
The most common locations for neurocutaneous melanosis have occurred along the interpeduncular fossa, ventral brainstem, upper cervical cord, and ventral lumbosacral cord.{{cite book |doi=10.1016/B978-0-444-62702-5.00007-X |pmid=26564074 |chapter=Neurocutaneous melanosis |title=Neurocutaneous Syndromes |volume=132 |pages=111–7 |series=Handbook of Clinical Neurology |year=2015 |last1=Islam |first1=Monica P. |isbn=978-0-444-62702-5 }}
See also
Additional images
File:Human brainstem anterior view 2 description.JPG|Human brainstem anterior view
File:Slide7dd.JPG|Interpeduncular fossa. Cerebrum. Deep dissection. Inferior dissection.
References
{{Gray's}}
External links
- [https://web.archive.org/web/20060903053329/http://www.med.umich.edu/lrc/coursepages/M1/anatomy/html/atlas/n1a8p1.html Diagram at UMich.edu]
{{Mesencephalon}}
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