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The calcar avis, (calcarine spur) previously known as the hippocampus minor, [1] is an involution of the wall of the lateral ventricle's posterior cornu produced by the calcarine fissure. [ 2 ] It is sometimes visible on ultrasonogram [ 3 ] and can resemble a clot .
Lateral ventricles and horns The lateral ventricles connected to the third ventricle by the interventricular foramina. Each lateral ventricle takes the form of an elongated curve, with an additional anterior-facing continuation emerging inferiorly from a point near the posterior end of the curve; the junction is known as the trigone of the lateral ventricle.
The ventricles contained within the rhombencephalon become the fourth ventricle, and the ventricles contained within the mesencephalon become the aqueduct of Sylvius. Separating the anterior horns of the lateral ventricles is the septum pellucidum : a thin, triangular, vertical membrane which runs as a sheet from the corpus callosum down to the ...
The lateral ventricles sit on either side of the septum. The septum pellucidum consists of two layers or laminae of both white and gray matter. [1] During fetal development, there is a space between the two laminae called the cave of septum pellucidum that, in ninety percent of cases, disappears during infancy.
This view shows the right ventricle from base to apex and is a useful view to estimate RV systolic function. TAPSE (= tricuspid annular plane systolic excursion) is also measured in this view with M-mode through the lateral tricuspid annulus. Structures: Inferior septum and anterior lateral segments of the left ventricle; Right ventricle; Left ...
The septum pellucidum is a thin, laminated translucent vertical membrane in the midline of the brain separating the anterior horns of the right and left lateral ventricles. It lies posterior to the corpus callosum. Persistence of the cave of septum pellucidum after infancy has been loosely associated with neural maldevelopment and several ...
[5] [6] In the choroid fissure of the lateral ventricles, the tela choroidea is a lateral extension of the tela choroidea from the third ventricle. [7] In the third ventricle, the tela choroidea forms the roof of the ventricle. Two vascular fringes from the lower fold invaginate the roof and form the choroid plexus.
The germinal matrix is the site of proliferating neuronal and glial precursors in the developing brain, which is located above the caudate nucleus, in the floor of the lateral ventricle, and caudothalamic groove. The germinal matrix contains a rich network of fragile thin-walled blood vessels.