The neural correlates of specific executive dysfunctions in Parkinson's disease.

Several functional neuroimaging studies in patients with Parkinson's disease (PD) have suggested that changes in the fronto-parietal-striatal networks are associated with deficits in executive functioning. However, executive functions (EF) are multifaceted and include three dissociable components: working memory, response inhibition, and task-switching. This study investigated which component of executive functioning is most strongly associated with fronto-parietal-striatal efficiency in PD.

(99m)TC-octreotide scintigraphy and somatostatin receptor subtype expression in juvenile nasopharyngeal angiofibromas.

Background: The main goal of the study was the analysis of somatostatin receptor (SSTR) expression on juvenile nasopharyngeal angiofibroma (JNA) cells and a subsequent analysis of the utility of SST analog-based scintigraphy in JNA diagnostics.

Methods: Nine JNA cases were analyzed. All tissue samples were analyzed for the expression of SSTRs.

MR examinations in the diagnostics of disorders in the cervical segment of the vertebral canal.

MR imaging technology has made it possible to detect and characterize a number of pathological changes in the vicinity of the vertebral canal a noninvasive manner. The method is characterized by high sensitivity and specificity. It has two basic advantages in comparison to computer-assisted X-ray tomography (CT):
- the ability to image the structure of the vertebral canal directly along planes selected by the operator.

The evaluation of articular cartilage in magnetic resonance imaging.

MR imaging is now the method of choice in the evaluation of articular cartilage, revealing its structure and thickness, as well as any changes occurring within the cartilage in all joint surfaces and bones, and in the soft tissues of the joints. The present study describes a method for examining cartilage and examples of pathological images.

Radioisotope examination in the evaluation of complications followed the implantation of joint prostheses.

Advances in orthopedic reconstructive and reparative techniques have resulted in a new population of patients suffering complications from these surgical procedures. Radionuclide examinations play an important role in the diagnosis of various types of complications following prosthesis implantation. Orthopedists can now choose from among several different radiopharmaceutic media: diphosphonates, gallium or labeled leukocyte.