hippocampal sulcus

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

Gross anatomy

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 .

Development

During embryonic development, the hippocampal sulcus appears as a shallow indentation around the 10week of gestation . The hippocampus develops and folds around the hippocampal sulcus between the 13and 16 weeks of gestation . By the 21 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 .

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

Siehe auch:

• Hippocampus
• hippocampale Sulcusreste