An angiographic study of the temporal horn.

The anatomy of the posterior cerebral artery (PCA) and its branches is described. On the vertebral angiogram, displacement of these vessels is a sign of corresponding displacement of the temporal horn, which in turn is an indication of a mass involving the temporal lobe, diencephalon, or midbrain. Specific angiographic criteria for localization of the temporal horn include (a) the position of the lateral choroid artery (LCA) as it runs within the choroidal fissure; (b) the temporal branches of the PCA as they cross the parahippocampal gyrus and pass into the collateral sulcus; and (c) the crural and ambient segments of the PCA as they pass around the midbrain.

Choice of the plane of incidence for computed tomography of the cerebral cortex.

A study has been carried out to determine how different planes of incidence may influence the computed tomographic projection of the different parts of the cerebral cortex. Knowledge of the patterns displayed with the different incidences should help in the identification of the various cortical (as well as high ventricular) structures.