1999.90

The 1999.90 about this object, including provenance, 1999.90, may not be currently accurate. If you notice a mistake or have additional information about this object, please email collectionsdata clevelandart.

Object: Some of the earliest successful frame-based stereotactic interventions directed toward the thalamus and basal ganglia depended on identifying the anterior commissure AC and posterior commissure PC in a sagittal ventriculogram and defining the intercommissural line that connects them in the midsagittal plane. The AC-PC line became the essential landmark for the localization of neuroanatomical targets in the basal ganglia and diencephalon and for relating them to stereotactic atlases. The goal of the present article is to present the authors' technique. Methods: The technique described uses MR sequences that minimize geometric distortion and registration error, thereby maximizing accuracy in AC-PC line determinations from axially displayed MR data. The technique is based on the authors' experience with the Leksell G-frame but can be generalized to other MR imaging-based stereotactic systems. This methodology has been used in a series of 62 stereotactic procedures in 47 adults 55 pallidotomies and seven thalamotomies with preliminary results that compare favorably with results reported when using microelectrode recordings. The measurements of the AC-PC line reported here also compare favorably with those based on ventriculography and computerized tomography scanning.

1999.90

They report the use of functional f MR imaging and magnetic source MS imaging for preoperative mapping of eloquent cortex in difficult cases of brain tumor resection such as those in which there are large expansive masses or in which reoperations are required and the anatomy is distorted from prior treatments. To correlate methods of preoperative and intraoperative mapping localization directly, the authors have developed techniques of importing preoperative MS and fMR imaging data into an image-guided frameless stereotactic computer workstation. The data appear as a seamless overlay on the same preoperative volumetric MR imaging dataset used for stereotactic guidance during the operation. Intraoperatively identified functional locations mapped by cortical stimulation are recorded as digitally registered points. This approach should prove useful in assessing the accuracy and reliability of various preoperative functional brain mapping techniques. Magn Reson Med —, Magn Reson Imaging —, J Neurosurg —, Stereotact Funct Neurosurg —, Neurology —, Radiology —, Third International Hans Berger Congress. Erlangen: Druchhaus Mayer Verlag, , pp 72—

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Due to rights restrictions, this image cannot be enlarged, viewed at full screen, or downloaded. As part of the Met's Open Access policy , you can freely copy, modify and distribute this image, even for commercial purposes. This artwork is meant to be viewed from right to left. Scroll left to view more. Use your arrow keys to navigate the tabs below, and your tab key to choose an item. Period: pre-Angkor period. Date: 8th—early 9th century.

Due to rights restrictions, this image cannot be enlarged, viewed at full screen, or downloaded. As part of the Met's Open Access policy , you can freely copy, modify and distribute this image, even for commercial purposes. This artwork is meant to be viewed from right to left. Scroll left to view more. Use your arrow keys to navigate the tabs below, and your tab key to choose an item. Period: pre-Angkor period. Date: 8th—early 9th century. Culture: Thailand. Medium: Bronze inlaid with obsidian? Dimensions: H.

1999.90

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Restricted access. AJNR —, false. J Neurosurg —, J Neurosurg 88 : — , Sartorius CJ, Berger MS: Rapid termination of intraoperative stimulation-evoked seizures with application of cold Ringer's lactate to the cortex. Did You Know? McDonald Articles by Spencer B. Orrison Articles by M. Article Information. Int J Neuroradiol 1: —, If you notice a mistake or have additional information about this object, please email collectionsdata clevelandart. Location: not on view. John L. Advanced Search Help.

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The Met's Libraries and Research Centers provide unparalleled resources for research and welcome an international community of students and scholars. Resources for Research The Met's Libraries and Research Centers provide unparalleled resources for research and welcome an international community of students and scholars. Volume Issue 3 Mar in Journal of Neurosurgery. Peter Heilbrun Similar articles in PubMed. Medium: Bronze inlaid with obsidian? Someone carefully removed it from its folding apparatus and converted it into a hanging scroll for occasional enjoyment in an alcove. Neurosurgery 31 : 59 — 72 , Uematsu S, Lesser R, Fisher RS, et al: Motor and sensory cortex in humans: topography studied with chronic subdural stimulation. Additional Views. J Neurosurg 62—68, Int J Neuroradiol 1: —, Sign in to annotate. Download, Print and Share Download. Contact us The information about this object, including provenance, may not be currently accurate. Peter Heilbrun Similar articles in Google Scholar. Open Access.