Interpeduncular fossa
Brain segment From Wikipedia, the free encyclopedia
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]
| 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 | |
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
Additional images
Human brainstem anterior view
Interpeduncular fossa. Cerebrum. Deep dissection. Inferior dissection.
References
External links
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