Interpeduncular fossa
Brain segment
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Through Pituitary gland
Structure
The interpeduncular fossa is a somewhat rhomboid-shaped area of the base of the brain.
Features
The lateral wall of the interpeduncular fossa bears a groove - the oculomotor sulcus - from which 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 bounded 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 posterior to anterior, are the posterior perforated substance, corpora mamillaria, tuber cinereum, infundibulum, and pituitary gland.
Contents
Contents of interpeduncular fossa include oculomotor nerve, and circle of Willis.
The basal veins pass alongside the interpeduncular fossa before joining the great cerebral vein.
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Clinical significance
The most common locations for neurocutaneous melanosis have occurred along the interpeduncular fossa, ventral brainstem, upper cervical cord, and ventral lumbosacral cord.