Interpeduncular fossa

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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
Latinfossa interpeduncularis
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Anatomical terms of neuroanatomy
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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

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

Features

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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

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

Boundaries

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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

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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

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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

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Additional images

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References

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

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