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Parietal Lobe

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2641. Converging levels of analysis in the cognitive neuroscience of visual attention. Full Text available with Trip Pro

systems competition is integrated such that the same, selected object tends to become dominant throughout. The behavioural studies reviewed concern divided attention within and between modalities. They implicate within-modality competition as one main restriction on concurrent stimulus identification. In contrast to the conventional association of lateral attentional focus with parietal lobe function, the lesion studies show attentional bias to be a widespread consequence of unilateral cortical damage (...) . Although the clinical syndrome of unilateral neglect may indeed be associated with parietal lesions, this probably reflects an assortment of further deficits accompanying a simple attentional imbalance. The functional imaging studies show joint involvement of lateral prefrontal and occipital cortex in lateral attentional focus and competition. The single unit studies suggest how competition in several regions of extrastriate cortex is biased by advance priming of neurons responsive to current

1998 Philosophical Transactions of the Royal Society B: Biological Sciences

2642. Effect of radiotherapy on brain glucose metabolism in patients operated on for low grade astrocytoma Full Text available with Trip Pro

Effect of radiotherapy on brain glucose metabolism in patients operated on for low grade astrocytoma To assess the effect of postoperative radiotherapy on brain glucose metabolism (CMRGlu) of operated patients with low grade astrocytomas.PET and 18F-fluorodeoxyglucose was used to measure absolute CMRGlu in patients with fibrillary astrocytoma (WHO II) of the frontal lobe, who did (n=7) or did not (n=12) receive radiotherapy subsequent to first debulking tumour resection. In addition (...) "). Superimposed, absolute CMRGlu in the contralateral frontal, parietal, occipital cortex as well as in the white matter was on average 17% lower in patients receiving radiotherapy than in patients who did not.The data discriminate a tumour effect from a radiotherapy effect, and support the view of adverse effects of radiotherapy on brain not directly involved by tumour.

1999 Journal of neurology, neurosurgery, and psychiatry

2643. Category differences in brain activation studies: where do they come from? Full Text available with Trip Pro

by activation of the left temporal lobe in a posterior region associated with name retrieval in several previous studies. This lexical effect was common to all meaningful stimuli and no category-specific effects were observed for naming relative to reading. Nevertheless, category differences were found when naming and reading were considered together. Stimuli with greater visual complexity (animals, faces and maps) enhanced activation in the left extrastriate cortex. Furthermore, map recognition, which (...) requires greater spatio-topographical processing, also activated the right occipito-parietal and parahippocampal cortices. These effects in the visuo-spatial regions emphasize inevitable differences in the perceptual properties of pictorial stimuli. In the semantic temporal regions, famous faces and objects enhanced activation in the left antero-lateral and postero-lateral cortices, respectively. In addition, we showed that the same posterior left temporal region is also activated by body parts. We

2000 Proceedings of the Royal Society B: Biological Sciences

2644. Survey for the Presence and Distribution of Human Herpesvirus 8 in Healthy Brain Full Text available with Trip Pro

Survey for the Presence and Distribution of Human Herpesvirus 8 in Healthy Brain Brain tissues from both sides of the cerebellum and frontal, temporal, parietal, and occipital lobes were collected postmortem from 30 patients for human herpesvirus 8 (HHV-8) detection by PCR. Overall, 42 of 300 (14.0%) samples were positive, with similar rates for each position. Nineteen patients (63.3%) were positive and showed a significant increase in positivity with age (P = 0.007). The results indicate

2000 Journal of clinical microbiology

2645. Reversible posterior leukencephalopathy syndrome induced by granulocyte stimulating factor filgrastim Full Text available with Trip Pro

Antipsychotic Agents 0 Diuretics 0 Recombinant Proteins 143011-72-7 Granulocyte Colony-Stimulating Factor PVI5M0M1GW Filgrastim IM Anticonvulsants therapeutic use Antipsychotic Agents therapeutic use Blindness, Cortical etiology Confusion etiology Diuretics therapeutic use Drug Therapy, Combination Female Filgrastim Granulocyte Colony-Stimulating Factor adverse effects Humans Magnetic Resonance Imaging Middle Aged Neurotoxicity Syndromes diagnosis drug therapy etiology Occipital Lobe pathology Parietal Lobe

2000 Journal of neurology, neurosurgery, and psychiatry

2646. Coccidioidomycosis of the brain, mimicking en plaque meningioma Full Text available with Trip Pro

Neurosurg Psychiatry 2985191R 0022-3050 0 Antifungal Agents 8VZV102JFY Fluconazole IM J Neurol Neurosurg Psychiatry. 2003 Aug;74(8):1165 Komotar J R [corrected to Komotar R J] Adult Antifungal Agents therapeutic use Brain microbiology pathology Coccidioidomycosis drug therapy microbiology pathology Diagnosis, Differential Female Fluconazole therapeutic use Humans Magnetic Resonance Imaging Meningeal Neoplasms pathology Meningioma pathology Occipital Lobe microbiology pathology Parietal Lobe microbiology

2003 Journal of neurology, neurosurgery, and psychiatry

2647. Magnetoencephalography in the study of human somatosensory cortical processing. Full Text available with Trip Pro

of different body parts. The SII cortex is activated bilaterally and it also receives, besides tactile input, nociceptive afference. Somatically evoked MEG signals may also be detected from the posterior parietal cortex, central mesial cortex and the frontal lobe. The serial versus parallel processing in the cortical somatosensory network is still under debate.

1999 Philosophical Transactions of the Royal Society B: Biological Sciences

2648. A paradoxical improvement of misreaching in optic ataxia: new evidence for two separate neural systems for visual localization. Full Text available with Trip Pro

A paradoxical improvement of misreaching in optic ataxia: new evidence for two separate neural systems for visual localization. We tested a patient (A. T.) with bilateral brain damage to the parietal lobes, whose resulting 'optic ataxia' causes her to make large pointing errors when asked to locate single light emitting diodes presented in her visual field. We report here that, unlike normal individuals, A. T.'s pointing accuracy improved when she was required to wait for 5 s before responding (...) . This counter-intuitive result is interpreted as reflecting the very brief time-scale on which visuomotor control systems in the superior parietal lobe operate. When an immediate response was required, A. T.'s damaged visuomotor system caused her to make large errors; but when a delay was required, a different, more flexible, visuospatial coding system--presumably relatively intact in her brain--came into play, resulting in much more accurate responses. The data are consistent with a dual processing theory

1999 Proceedings of the Royal Society B: Biological Sciences

2649. How does the cortex construct color? Full Text available with Trip Pro

0027-8424 IM Proc Natl Acad Sci U S A. 1999 Nov 23;96(24):14124-9 10570209 Cerebral Cortex physiology Color Perception physiology Humans Magnetic Resonance Imaging Occipital Lobe physiology Parietal Lobe physiology 1999 11 26 1999 11 26 0 1 1999 11 26 0 0 ppublish 10570116 PMC33934 Behav Brain Res. 1992 Sep 28;50(1-2):115-26 1449639 Nat Neurosci. 1999 Aug;2(8):753-8 10412066 Acta Psychol (Amst). 1997 Oct;97(1):25-35 9448512 Neuroscience. 1983 Aug;9(4):767-81 6621878 Exp Brain Res. 1998 Nov;123(1-2

1999 Proceedings of the National Academy of Sciences of the United States of America

2650. Lung folding simulating peripheral pulmonary neoplasm (Blesovsky's syndrome). Full Text available with Trip Pro

Lung folding simulating peripheral pulmonary neoplasm (Blesovsky's syndrome). Six cases are reported in whom the diagnosis of benign pleural thickening with lung folding simulating peripheral pulmonary neoplasm was made. Three patients presented with chest pain, two were asymptomatic, and the abnormality was a chance finding in one patient with asthma. The radiographs in all cases showed similar appearances--a peripheral opacity appearing to lie within the lung, usually the lower lobe (...) , and characteristic curvilinear shadows extending from the opacity to the hilum. At thoracotomy, predominantly visceral pleural thickening had caused the underlying lung to fold. Hyaline plaques were present on the parietal pleura elsewhere and pleural adhesions were usually absent. Adequate removal of the thickened visceral pleura in five patients allowed the folded lung to re-expand, with reversion of the chest radiograph to normal. One patient in whom the underlying lung folding was not appreciated

1980 Thorax

2651. Magnetic Resonance Imaging of Calculus Problem Solving

cognition between non-frontal neural structures, such as left parietal lobe, and frontal neural structures involved in mechanistic plans, actions and mental sets. The data collected will consist of behavioral measures of cognitive performance and corresponding fMRI images. The data that we collect in this protocol will be of value in identifying a set of neural regions and distributed networks mediating the forms of knowledge representation stored in the prefrontal cortex. We will also use the data (...) obtained in these studies to constrain theories of frontal lobe function and to provide evidence for the role of specific frontal cortex sectors in specific cognitive functions. Study Design Go to Layout table for study information Study Type : Observational Enrollment : 60 participants Official Title: Functional Neuroimaging of Calculus Problem Solving Study Start Date : May 2003 Study Completion Date : March 2005 Groups and Cohorts Go to Outcome Measures Go to Eligibility Criteria Go to Information

2003 Clinical Trials

2652. Use of Transcranial Magnetic Stimulation (TMS) and Magnetic Resonance Imaging (MRI) to Study Visual Attention

Magnetic Stimulation Parietal Lobe fMRI Cognition Perception Cortical Stimulation Spatial Attention (...) . Functional brain imaging studies also suggest that these attentional filtering mechanisms are mediated by top-down feedback signals arising in higher-order areas in frontal and parietal cortex. However, it is not clear from these studies whether these frontal and parietal brain regions are functionally significant in attentional control of behavior. Transcranial magnetic stimulation (TMS) applied over a particular cortical region can interfere with cognitive processing in that region, thereby creating

2000 Clinical Trials

2653. Comparison of Externally and Self-Initiated Movements

2005 Keywords provided by National Institutes of Health Clinical Center (CC): Voluntary Movement Functional MRI Sensorimotor Integration Superior Parietal Lobe Supplementary Motor Area Normal Control HV Healthy Volunteer

2001 Clinical Trials

2654. Abnormal Angular Gyrus Asymmetry in Schizophrenia Full Text available with Trip Pro

Abnormal Angular Gyrus Asymmetry in Schizophrenia Few studies have evaluated the parietal lobe in schizophrenia despite the fact that it has an important role in attention, memory, and language-all functions that have been reported to be abnormal in schizophrenia. The inferior parietal lobule, in particular, is of interest because it is not only part of the heteromodal association cortex but also is part of the semantic-lexical network, which also includes the planum temporale. Both (...) the inferior parietal lobule, particularly the angular gyrus of the inferior parietal lobule, and the planum temporale are brain regions that play a critical role as biological substrates of language and thought. The authors compared volume and asymmetry measures of the individual gyri of the parietal lobe by means of magnetic resonance imaging (MRI) scans.MRI scans with a 1. 5-Tesla magnet were obtained from 15 male chronic schizophrenic and 15 comparison subjects matched for age, gender, and parental

2000 The American Journal of Psychiatry

2655. A review of MRI findings in schizophrenia Full Text available with Trip Pro

, there was moderate evidence for parietal lobe abnormalities (60% of studies reviewed), particularly of the inferior parietal lobule which includes both supramarginal and angular gyri. Additionally, there was strong to moderate evidence for subcortical abnormalities (i.e. cavum septi pellucidi-92% of studies reviewed, basal ganglia-68% of studies reviewed, corpus callosum-63% of studies reviewed, and thalamus-42% of studies reviewed), but more equivocal evidence for cerebellar abnormalities (31% of studies (...) involvement of medial temporal lobe structures (74% of studies reviewed), which include the amygdala, hippocampus, and parahippocampal gyrus, and neocortical temporal lobe regions (superior temporal gyrus) (100% of studies reviewed). When gray and white matter of superior temporal gyrus was combined, 67% of studies reported abnormalities. There was also moderate evidence for frontal lobe abnormalities (59% of studies reviewed), particularly prefrontal gray matter and orbitofrontal regions. Similarly

2001 Schizophrenia Research

2656. Chemotherapy Followed by Radiation Therapy in Treating Adults With Supratentorial Glioma

DISEASE CHARACTERISTICS: Histologically confirmed supratentorial * grade I/II glioma, including: Diffuse fibrillary astrocytoma No pilocytic astrocytoma No mixed tumor with ependymoma elements * Supratentorial sites include: Frontal, temporal, parietal, or occipital lobes Thalamus, basal ganglia, or midbrain Lateral or third ventricles Pons, medulla, or optic chiasm tumors allowed only if secondary to eligible tumor More than 1 separate tumor allowed Diagnosis based on surgical biopsy or subtotal

1999 Clinical Trials

2657. MR Imaging and Histopathologic Findings of A Case of Cerebral Ganglioneurocytoma Full Text available with Trip Pro

MR Imaging and Histopathologic Findings of A Case of Cerebral Ganglioneurocytoma We report a case of ganglioneurocytoma manifesting as a complex partial seizure in a young adult male. MR images depicted a well-marginated cystic mass with a heterogeneous solid portion abutting the dura in the parietal lobe. The solid portion showed minimal heterogeneous enhancement, and pressure erosion of the overlying calvarium had occurred. Following gross total resection, the clinical outcome

2002 Korean Journal of Radiology

2658. An Autosomal Recessive Form of Bilateral Frontoparietal Polymicrogyria Maps to Chromosome 16q12.2-21 Full Text available with Trip Pro

the responsible gene. We studied two consanguineous Palestinian pedigrees with an autosomal recessive form of bilateral frontoparietal polymicrogyria (BFPP), using linkage analysis. Five affected children had moderate-to-severe mental retardation, developmental delay, and esotropia, and four of the five affected children developed seizures. Brain magnetic-resonance imaging revealed polymicrogyria that was most prominent in the frontal and parietal lobes but involved other cortical areas as well. A genomewide

2002 American Journal of Human Genetics

2659. Prediction of unidentified human genes on the basis of sequence similarity to novel cDNAs from cynomolgus monkey brain Full Text available with Trip Pro

Prediction of unidentified human genes on the basis of sequence similarity to novel cDNAs from cynomolgus monkey brain The complete assignment of the protein-coding regions of the human genome is a major challenge for genome biology today. We have already isolated many hitherto unknown full-length cDNAs as orthologs of unidentified human genes from cDNA libraries of the cynomolgus monkey (Macaca fascicularis) brain (parietal lobe and cerebellum). In this study, we used cDNA libraries of three (...) other parts of the brain (frontal lobe, temporal lobe and medulla oblongata) to isolate novel full-length cDNAs.The entire sequences of novel cDNAs of the cynomolgus monkey were determined, and the orthologous human cDNA sequences were predicted from the human genome sequence. We predicted 29 novel human genes with putative coding regions sharing an open reading frame with the cynomolgus monkey, and we confirmed the expression of 21 pairs of genes by the reverse transcription-coupled polymerase

2001 Genome Biology

2660. [Seizure prevention using carbamazepine following severe brain injuries]. (Abstract)

in total, but not regarding late seizures per se. Brain lesions with a high risk of post-traumatic seizures were situated in the parietal and temporal areas and included acute subdural haematomas in all locations, temporal lobe contusions, parietal epidural haematomas accompanied by other lesions and the deep stages of coma. Brain stem contusions were accompanied by a rather low probability of seizures. The above mentioned types and locations of brain lesions with the exception of brain stem contusions

1983 Neurochirurgia Controlled trial quality: uncertain

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