1999.90

The information about this object, including provenance, may not be currently accurate, 1999.90.

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.

1999.90

Object: The authors performed a retrospective analysis of consecutive patients in whom instrumentation was placed to promote lumbar fusion for the treatment of degenerative instability. All procedures were performed by a single surgeon. The authors sought to determine the risk factors for next-segment degeneration after lumbar spinal fusion with rigid instrumentation. Methods: Thirty-one of fusion procedures were performed in women who were postmenopausal. A total of 18 of patients developed symptomatic next-segment degeneration at a previously asymptomatic level; 15 were postmenopausal women. Data were obtained in patients with next-segment failure based on radiographic studies, neurological assessment, demographic factors, and sequential follow-up examinations. The mean follow-up period for this group was Twenty percent of all patients with next-segment failure were cigarette smokers. Patients frequently had more than one degenerative process at the next segment. Conclusions: The risk of adjacent-segment failure is clearly higher for patients in whom lumbar fusion with rigid instrumentation is performed to treat degenerative instability. This risk appears to be especially high in postmenopausal women. Abstract Object: The authors performed a retrospective analysis of consecutive patients in whom instrumentation was placed to promote lumbar fusion for the treatment of degenerative instability.

McDonald Article by Spencer B. Peter Heilbrun Similar articles in PubMed.

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.

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1999.90

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.

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Abstract 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. Integration of preoperative and intraoperative functional brain mapping in a frameless stereotactic environment for lesions near eloquent cortex Technical note. McDonald Articles by Spencer B. Credit line. AJNR —, false. Jeffrey D. For images not available through Open Access, a detail image, or any image with a color bar, request a digital file from Image Services. The technique is based on the authors' experience with the Leksell G-frame but can be generalized to other MR imaging-based stereotactic systems. Restricted access. Erlangen: Druchhaus Mayer Verlag, , pp 72—79 false. Koehler Spencer B. Substances Contrast Media. Object: The authors performed a retrospective analysis of consecutive patients in whom instrumentation was placed to promote lumbar fusion for the treatment of degenerative instability. Dimensions: H.

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Bodhisattva Avalokiteshvara second half of the 7th century. Did You Know? Period: pre-Angkor period. Robert B. J Neurosurg 75 : 62 — 68 , Rostomily RC, Berger MS, Ojemann GA, et al: Postoperative deficits and functional recovery following removal of tumors involving the dominant hemisphere supplementary motor area. Substances Contrast Media. Japan, Edo period J Neurosurg 88 : — , Sartorius CJ, Berger MS: Rapid termination of intraoperative stimulation-evoked seizures with application of cold Ringer's lactate to the cortex. As part of the Met's Open Access policy , you can freely copy, modify and distribute this image, even for commercial purposes. Case report. Methods: Thirty-one of fusion procedures were performed in women who were postmenopausal. While fragile paper fans are often used for a single season, this one was cherished for its design. Advanced Search Help.