Transverse fissure

Last revised by Dr Henry Knipe on 01 Jun 2020

The transverse fissure (of Bichat) is the cerebral fissure that extends laterally from the ambient cistern towards the hippocampus.

The transverse fissure is the lateral extension of the ambient cistern that connects with the choroidal fissure superolaterally and hippocampal fissure inferolaterally. These three fissures are collectively known as the perihippocampal fissures 1. The transverse fissure separates the thalamus superiorly from the parahippocampal gyrus inferiorly 2

Some sources also describe an even more medial part of the transverse fissure that separates the thalamus from the fornix and corpus callosum 3.

The structure is named after French anatomist Marie-François Xavier Bichat 4.

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