Interpeduncular fossa

Interpeduncular fossa
Base of brain
Section through superior colliculus showing path of oculomotor nerve (interpeduncular fossa not labeled, but visible at bottom center)
Details
Identifiers
Latin	fossa interpeduncularis
NeuroNames	489
Anatomical terms of neuroanatomy [ edit on Wikidata]

The interpeduncular fossa is a deep depression of the ventral surface of the midbrain between the two cerebal crura. ^{[1] [2] [3]} It has been found in humans and macaques, but not in rats or mice, showing that this is a relatively new evolutionary region. ^[4]

Structure

The interpeduncular fossa is a somewhat rhomboid-shaped area of the base of the brain. ^[5]

Features

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 and aggregate into a single fascicle. ^{[3] [6]}

Anatomical relations

The ventral tegmental area lies at the depth of the interpeduncular fossa. ^[3]

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. ^[5]

The floor of interpeduncular fossa, from behind forward,^{[ citation needed ]} are the posterior perforated substance, ^[2] corpora mamillaria, tuber cinereum, infundibulum, and pituitary gland.^{[ citation needed ]}

Contents

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. ^[7]

Clinical significance

The most common locations for neurocutaneous melanosis have occurred along the interpeduncular fossa, ventral brainstem, upper cervical cord, and ventral lumbosacral cord. ^[8]

See also

• Interpeduncular cistern
• Cerebral peduncles

Additional images

• 
  Human brainstem anterior view
• 
  Interpeduncular fossa. Cerebrum. Deep dissection. Inferior dissection.

References

This article incorporates text in the public domain from page 816 of the 20th edition of Gray's Anatomy (1918)

1. Basinger, Hayden; Hogg, Jeffery P. (2022), "Neuroanatomy, Brainstem", StatPearls, Treasure Island (FL): StatPearls Publishing, PMID   31335017 , retrieved 2022-08-08
2. "fossa interpeduncularis". TheFreeDictionary.com. Retrieved 2022-08-08.
3. Gray's anatomy : the anatomical basis of clinical practice. Susan Standring (42nd ed.). [New York]. 2021. pp. 456–459. ISBN   978-0-7020-7707-4. OCLC   1201341621.
4. "BrainInfo". braininfo.rprc.washington.edu. Retrieved 2019-04-03.
5. "Interpeduncular fossa". IMAIOS. Retrieved 2019-04-03.
6. "sulcus of the oculomotor nerve". TheFreeDictionary.com. Retrieved 2022-08-08.
7. Gray's anatomy : the anatomical basis of clinical practice. Susan Standring (42nd ed.). [New York]. 2021. p. 422. ISBN   978-0-7020-7707-4. OCLC   1201341621.
8. Islam, Monica P. (2015). "Neurocutaneous melanosis". Neurocutaneous Syndromes. Handbook of Clinical Neurology. Vol. 132. pp. 111–7. doi:10.1016/B978-0-444-62702-5.00007-X. ISBN   978-0-444-62702-5. PMID   26564074.

External links

• Diagram at UMich.edu