The interpeduncular fossa is a deep depression[1] of the ventral surface of the midbrain[2]: 456 between the two crura cerebri.[2]: 456 [3]
Interpeduncular fossa | |
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Details | |
Identifiers | |
Latin | fossa interpeduncularis |
NeuroNames | 489 |
Anatomical terms of neuroanatomy [edit on Wikidata] |
It has been found in humans and macaques, but not in rats or mice, showing that this is a relatively new evolutionary region.[4]
The interpeduncular fossa is a somewhat rhomboid-shaped area of the base of the brain.[5]
The lateral wall of the interpeduncular fossa bears a groove - the oculomotor sulcus - from which[6] rootlets of the oculomotor nerve emerge from the substance of the brainstem[6][2]: 456 and aggregate into a single fascicle.[2]: 456
The ventral tegmental area lies at the depth of the interpeduncular fossa.[2]: 459
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.[5]
The floor of interpeduncular fossa, from behind forward,[citation needed] are the posterior perforated substance,[1] corpora mamillaria, tuber cinereum, infundibulum, and pituitary gland.[citation needed]
Contents of interpeduncular fossa include oculomotor nerve, and circle of Willis.[citation needed]
The basal veins pass alongside the interpeduncular fossa before joining the great cerebral vein.[2]: 422
The most common locations for neurocutaneous melanosis have occurred along the interpeduncular fossa, ventral brainstem, upper cervical cord, and ventral lumbosacral cord.[7]
This article incorporates text in the public domain from page 816 of the 20th edition of Gray's Anatomy (1918)
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