Fimbria of the hippocampus

Template:Infobox Brain Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Overview

With regard to the brain, the fimbria is a prominent band of white matter along the medial edge of the hippocampus.

Structure

The fimbria is an accumulation of myelinated axons (mostly efferent) that first collect on the ventricular surface of the hippocampus as the alveus (a thin layer resembling an inverted trough).

Relations

Near the splenium the fimbria separates from the hippocampus as the crus of the fornix.

Additional images

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  Diagram of hippocampus

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  Section of brain showing upper surface of temporal lobe.

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  Scheme of rhinencephalon.

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  Posterior and inferior cornua of left lateral ventricle exposed from the side.

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  Inferior and posterior cornua, viewed from above.

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  Diagram of the fornix.

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  The fornix and corpus callosum from below.