This investigation describes the variability in location of functionally important persylvian landmarks and of the calcarine sulcus within the Talairach stereotaxic grid, a system frequently used for cortical localization in functional images. Twenty healthy volunteers (40 hemispheres) had MR imaging under stereotaxic conditions. Outlines of the following structures were directly identified on ...

bstract—Developments in functional neuroimaging in noral human subjects, such as functional magnetic resonance maging (fMRI), have permitted the mapping of several visual reas of the human brain and have already provided proviional identification of some of the visual areas that were first escribed in nonhuman primates. However, the lack of a etailed description of the sulcal patterns of the hu...

A stereotaxic atlas of the pig brain has been established. It consists of 60 frontal and 18 sagittal drawings illustrating Nissl stained sections. A stereotaxic apparatus adapted for the Pig was used to determine the brain coordinates. Radiographic techniques were applied to verify the correct position of the central nervous structures in the apparatus. The zero horizontal plane contains the li...

RESULTS: Microcalcifications were detected radiographically in 146 of 361 (40%) cores. If calcifications were present on specimen radiographs, histologic detection of these calcifications was made in 114 of 146 (78%) specimens, and diagnosis was made in 118 of 146 (81%). If calcifications were not present on specimen radiographs, histologic detection was obtamed in 27 of 215 (13%) specimens and...

A technique is described which combines computed tomography-based stereotaxic localization and CO2 laser ablation of certain intracranial lesions with a high degree of accuracy. In 24 patients operated on with this technique, total ablation of the lesion was achieved in 19 and incomplete ablation in the other five. Though not perfect, this method is a new approach to intracranial lesions that p...

MOST groups working on avian brains use head holders adapted to their needs from conventions available ones such as the Kopf and Wells stereotaxic devices. One example is the so-called Revzin-adaptor described by Karten and Hodos [l]. An advantage of their modification is the more accurate placement of the head in an exactly defined angle to the vertical, but this hinders free access to the lat...

A stereotaxic apparatus and technique for its implantation in diencephalic nuclei of Atlantic salmon parr of 20 to 30 g body weight is described. An atlas of nuclei in the diencephalon is also presented.