Fimbria of the hippocampus

From Wikipedia, the free encyclopedia

Brain: Fimbria of the hippocampus
Coronal section of inferior horn of lateral ventricle. (Fimbria labeled at center left.)
Latin	fimbria hippocampi
Gray's	subject #189 840
NeuroNames	hier-169
Dorlands/Elsevier	f_07/12364986

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

[edit] 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).

[edit] Relations

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

[edit] Additional images

Diagram of hippocampus	Section of brain showing upper surface of temporal lobe.	Scheme of rhinencephalon.	Posterior and inferior cornua of left lateral ventricle exposed from the side.
Inferior and posterior cornua, viewed from above.	Diagram of the fornix.	The fornix and corpus callosum from below.

v • d • e Human brain: Limbic system Diencephalon Hypothalamus · Mammillary body Telencephalon: limbic lobe Archicortex: Hippocampal formation (Hippocampus, Alveus of the hippocampus, Subiculum, Perforant path, Fimbria, Dentate gyrus) · Paraterminal gyrus · Supracallosal gyrus Cingulate gyrus · Parahippocampal gyrus · Uncus Telencephalon: other Amygdala · Nucleus accumbens · Orbitofrontal cortex septum: Septum pellucidum, Septal nuclei