Band of Giacomini

Last revised by Henry Knipe on 1 Feb 2020

The band of Giacomini, also known as the tail of the dentate gyrus or limbus Giacomini, is the anteromedial continuation of the dentate gyrus, which in turn is part of the hippocampal formation, along with the hippocampus, subicular complex and entorhinal cortex. It is an important anatomical landmark of the inferior surface of the uncus, separating in into the intralimbic gyrus posteriorly, and anterior uncinate gyrus anteriorly 1,2

Gross anatomy

The band of Giacomini is a visible segment of the dentate gyrus, in contrast to most of the dentate gyrus which is not exposed on the brain surface 1. It is the anteromedial continuation, underlying the head of the hippocampus, of the margo denticulatus which relates to the hippocampal body 3

Posterior to the band of Giacomini, the uncal apex is formed by CA3 and CA4, and covered by the alveus. The fimbria is attached to its extremity 1.

History and etymology

It is named after Carlo Giacomini (1840-1898), later Professor of Anatomy at the University of Turin, Italy. The vein of Giacomini and Giacomini vertebrae are also named for this Italian anatomist and neuroscientist 4.

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