Hippocampal sulcus

Last revised by Francis Deng on 30 Jun 2019

Citation, DOI, disclosures and article data

Citation:

Deng F, Hippocampal sulcus. Reference article, Radiopaedia.org (Accessed on 23 Apr 2024) https://doi.org/10.53347/rID-69149

DOI:

https://doi.org/10.53347/rID-69149

Permalink:

https://radiopaedia.org/articles/69149

rID:

69149

Article created:

30 Jun 2019, Francis Deng ◉

Disclosures:

At the time the article was created Francis Deng had no recorded disclosures.

View Francis Deng's current disclosures

Last revised:

30 Jun 2019, Francis Deng ◉

Disclosures:

At the time the article was last revised Francis Deng had no recorded disclosures.

View Francis Deng's current disclosures

Revisions:

1 time, by 1 contributor - see full revision history and disclosures

Systems:

Central Nervous System

Sections:

Anatomy

Synonyms:

Hippocampal fissure

The hippocampal sulcus, or hippocampal fissure, is a sulcus within the hippocampal formation that separates the dentate gyrus from the subiculum.

The hippocampal sulcus is the inferior lateral extension of the transverse fissure (of Bichat), which in turn communicates with the ambient cistern. It is a shallow groove on the medial surface of the hippocampus, between the dentate gyrus and subiculum, inferior to the fimbria and fimbriodentate sulcus ¹.

Development

During embryonic development, the hippocampal sulcus appears as a shallow indentation around the 10^thweek of gestation ¹. The hippocampus develops and folds around the hippocampal sulcus between the 13^thand 16^th weeks of gestation ². By the 21^st week of gestation, all but the most medial/superficial part of the hippocampal sulcus is obliterated due to fusion of the cornus ammonis and dentate gyrus, resembling the adult hippocampal formation ^1,2.

Related pathology

hippocampal sulcus remnant cyst: failure of obliteration of the embryonic hippocampal sulcus
Alzheimer disease: hippocampal sulcus enlargement due to medial temporal lobe atrophy ^1,3