Search Results - (Author, Cooperation:L. Nyberg)

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  1. 1
    D. P. Hibar ; J. L. Stein ; M. E. Renteria ; A. Arias-Vasquez ; S. Desrivieres ; N. Jahanshad ; R. Toro ; K. Wittfeld ; L. Abramovic ; M. Andersson ; B. S. Aribisala ; N. J. Armstrong ; M. Bernard ; M. M. Bohlken ; M. P. Boks ; J. Bralten ; A. A. Brown ; M. M. Chakravarty ; Q. Chen ; C. R. Ching ; G. Cuellar-Partida ; A. den Braber ; S. Giddaluru ; A. L. Goldman ; O. Grimm ; T. Guadalupe ; J. Hass ; G. Woldehawariat ; A. J. Holmes ; M. Hoogman ; D. Janowitz ; T. Jia ; S. Kim ; M. Klein ; B. Kraemer ; P. H. Lee ; L. M. Olde Loohuis ; M. Luciano ; C. Macare ; K. A. Mather ; M. Mattheisen ; Y. Milaneschi ; K. Nho ; M. Papmeyer ; A. Ramasamy ; S. L. Risacher ; R. Roiz-Santianez ; E. J. Rose ; A. Salami ; P. G. Samann ; L. Schmaal ; A. J. Schork ; J. Shin ; L. T. Strike ; A. Teumer ; M. M. van Donkelaar ; K. R. van Eijk ; R. K. Walters ; L. T. Westlye ; C. D. Whelan ; A. M. Winkler ; M. P. Zwiers ; S. Alhusaini ; L. Athanasiu ; S. Ehrlich ; M. M. Hakobjan ; C. B. Hartberg ; U. K. Haukvik ; A. J. Heister ; D. Hoehn ; D. Kasperaviciute ; D. C. Liewald ; L. M. Lopez ; R. R. Makkinje ; M. Matarin ; M. A. Naber ; D. R. McKay ; M. Needham ; A. C. Nugent ; B. Putz ; N. A. Royle ; L. Shen ; E. Sprooten ; D. Trabzuni ; S. S. van der Marel ; K. J. van Hulzen ; E. Walton ; C. Wolf ; L. Almasy ; D. Ames ; S. Arepalli ; A. A. Assareh ; M. E. Bastin ; H. Brodaty ; K. B. Bulayeva ; M. A. Carless ; S. Cichon ; A. Corvin ; J. E. Curran ; M. Czisch ; G. I. de Zubicaray ; A. Dillman ; R. Duggirala ; T. D. Dyer ; S. Erk ; I. O. Fedko ; L. Ferrucci ; T. M. Foroud ; P. T. Fox ; M. Fukunaga ; J. R. Gibbs ; H. H. Goring ; R. C. Green ; S. Guelfi ; N. K. Hansell ; C. A. Hartman ; K. Hegenscheid ; A. Heinz ; D. G. Hernandez ; D. J. Heslenfeld ; P. J. Hoekstra ; F. Holsboer ; G. Homuth ; J. J. Hottenga ; M. Ikeda ; C. R. Jack, Jr. ; M. Jenkinson ; R. Johnson ; R. Kanai ; M. Keil ; J. W. Kent, Jr. ; P. Kochunov ; J. B. Kwok ; S. M. Lawrie ; X. Liu ; D. L. Longo ; K. L. McMahon ; E. Meisenzahl ; I. Melle ; S. Mohnke ; G. W. Montgomery ; J. C. Mostert ; T. W. Muhleisen ; M. A. Nalls ; T. E. Nichols ; L. G. Nilsson ; M. M. Nothen ; K. Ohi ; R. L. Olvera ; R. Perez-Iglesias ; G. B. Pike ; S. G. Potkin ; I. Reinvang ; S. Reppermund ; M. Rietschel ; N. Romanczuk-Seiferth ; G. D. Rosen ; D. Rujescu ; K. Schnell ; P. R. Schofield ; C. Smith ; V. M. Steen ; J. E. Sussmann ; A. Thalamuthu ; A. W. Toga ; B. J. Traynor ; J. Troncoso ; J. A. Turner ; M. C. Valdes Hernandez ; D. van 't Ent ; M. van der Brug ; N. J. van der Wee ; M. J. van Tol ; D. J. Veltman ; T. H. Wassink ; E. Westman ; R. H. Zielke ; A. B. Zonderman ; D. G. Ashbrook ; R. Hager ; L. Lu ; F. J. McMahon ; D. W. Morris ; R. W. Williams ; H. G. Brunner ; R. L. Buckner ; J. K. Buitelaar ; W. Cahn ; V. D. Calhoun ; G. L. Cavalleri ; B. Crespo-Facorro ; A. M. Dale ; G. E. Davies ; N. Delanty ; C. Depondt ; S. Djurovic ; W. C. Drevets ; T. Espeseth ; R. L. Gollub ; B. C. Ho ; W. Hoffmann ; N. Hosten ; R. S. Kahn ; S. Le Hellard ; A. Meyer-Lindenberg ; B. Muller-Myhsok ; M. Nauck ; L. Nyberg ; M. Pandolfo ; B. W. Penninx ; J. L. Roffman ; S. M. Sisodiya ; J. W. Smoller ; H. van Bokhoven ; N. E. van Haren ; H. Volzke ; H. Walter ; M. W. Weiner ; W. Wen ; T. White ; I. Agartz ; O. A. Andreassen ; J. Blangero ; D. I. Boomsma ; R. M. Brouwer ; D. M. Cannon ; M. R. Cookson ; E. J. de Geus ; I. J. Deary ; G. Donohoe ; G. Fernandez ; S. E. Fisher ; C. Francks ; D. C. Glahn ; H. J. Grabe ; O. Gruber ; J. Hardy ; R. Hashimoto ; H. E. Hulshoff Pol ; E. G. Jonsson ; I. Kloszewska ; S. Lovestone ; V. S. Mattay ; P. Mecocci ; C. McDonald ; A. M. McIntosh ; R. A. Ophoff ; T. Paus ; Z. Pausova ; M. Ryten ; P. S. Sachdev ; A. J. Saykin ; A. Simmons ; A. Singleton ; H. Soininen ; J. M. Wardlaw ; M. E. Weale ; D. R. Weinberger ; H. H. Adams ; L. J. Launer ; S. Seiler ; R. Schmidt ; G. Chauhan ; C. L. Satizabal ; J. T. Becker ; L. Yanek ; S. J. van der Lee ; M. Ebling ; B. Fischl ; W. T. Longstreth, Jr. ; D. Greve ; H. Schmidt ; P. Nyquist ; L. N. Vinke ; C. M. van Duijn ; L. Xue ; B. Mazoyer ; J. C. Bis ; V. Gudnason ; S. Seshadri ; M. A. Ikram ; N. G. Martin ; M. J. Wright ; G. Schumann ; B. Franke ; P. M. Thompson ; S. E. Medland
    Nature Publishing Group (NPG)
    Published 2015
    Staff View
    Publication Date:
    2015-01-22
    Publisher:
    Nature Publishing Group (NPG)
    Print ISSN:
    0028-0836
    Electronic ISSN:
    1476-4687
    Topics:
    Biology
    Chemistry and Pharmacology
    Medicine
    Natural Sciences in General
    Physics
    Keywords:
    Adolescent ; Adult ; Aged ; Aged, 80 and over ; Aging/genetics ; Apoptosis/genetics ; Brain/*anatomy & histology ; Caudate Nucleus/anatomy & histology ; Child ; Female ; Gene Expression Regulation, Developmental/genetics ; Genetic Loci/genetics ; Genetic Variation/*genetics ; *Genome-Wide Association Study ; Hippocampus/anatomy & histology ; Humans ; Magnetic Resonance Imaging ; Male ; Membrane Proteins/genetics ; Middle Aged ; Organ Size/genetics ; Putamen/anatomy & histology ; Sex Characteristics ; Skull/anatomy & histology ; Young Adult
    Published by:
    Latest Papers from Table of Contents or Articles in Press
  2. 2
    L. Backman ; L. Nyberg ; A. Soveri ; J. Johansson ; M. Andersson ; E. Dahlin ; A. S. Neely ; J. Virta ; M. Laine ; J. O. Rinne
    American Association for the Advancement of Science (AAAS)
    Published 2011
    Staff View
    Publication Date:
    2011-08-06
    Publisher:
    American Association for the Advancement of Science (AAAS)
    Print ISSN:
    0036-8075
    Electronic ISSN:
    1095-9203
    Topics:
    Biology
    Chemistry and Pharmacology
    Computer Science
    Medicine
    Natural Sciences in General
    Physics
    Keywords:
    Adult ; Corpus Striatum/*metabolism/radionuclide imaging ; Dopamine/*metabolism ; Humans ; *Learning ; Male ; *Memory, Short-Term ; Positron-Emission Tomography ; Raclopride/metabolism ; Receptors, Dopamine D2/*metabolism ; Young Adult
    Published by:
    Latest Papers from Table of Contents or Articles in Press
  3. 3
    Berlin, L. ; Bohlin, G. ; Nyberg, L. ; Janols, L.-O.

    Oxford, UK : Blackwell Science Ltd
    Published 2003
    Staff View
    ISSN:
    1365-2214
    Source:
    Blackwell Publishing Journal Backfiles 1879-2005
    Topics:
    Medicine
    Psychology
    Notes:
    Objective  To study sustained performance and its relation to regulation of effort among four different groups of children: two clinical subgroups of children diagnosed with attention-deficit hyperactivity disorder (ADHD) – one with and one without comorbid oppositional defiant disorder (ODD); a control sample of children without a diagnosis of ADHD but with parental reports of hyperactivity; and a normal control sample.Methods  Sustained performance was studied (n= 64) using a choice reaction time task with long interstimulus intervals, and hyperactive behaviour and regulation of effort was rated throughout the task.Results  The clinical sample differed from the normal controls regarding all measures of overall, but not initial, performance. When studying performance over time, the ADHD group was shown to differ from the normal controls with regard to omissions, mean reaction time and regulation of effort. No significant differences were found between the ADHD children with or without comorbid ODD. The non-clinical hyperactive children differed from the normal controls with regard to reaction time, initially and overall, and regulation of effort overall.Conclusions  Deficits in sustained performance among ADHD children appear to be evident when long interstimulus intervals are used, and these deficits are related to poor regulation of effort. Further, the observed differences between ADHD children and normal controls do not appear to be a result of comorbid conduct problems. The non-clinical hyperactive children were more similar to the control group than to the ADHD group.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  4. 4
    Nyberg, L. ; Mclntosh, A. R. ; Houle, S. ; Nilsson, L.-G. ; Tulving, E.

    [s.l.] : Nature Publishing Group
    Published 1996
    Staff View
    ISSN:
    1476-4687
    Source:
    Nature Archives 1869 - 2009
    Topics:
    Biology
    Chemistry and Pharmacology
    Medicine
    Natural Sciences in General
    Physics
    Notes:
    [Auszug] The experiment included four conditions in which regional cerebral blood flow (rCBF) was estimated from PET counts8: visual recognition of words following meaning based encoding; visual recognition of words following perceptual encoding; visual recognition of non-studied words; and a baseline ...
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  5. 5
    Nyberg, L. ; Viotti, S.

    Amsterdam : Elsevier
    Staff View
    ISSN:
    0047-2727
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Economics
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  6. 6
    Roos, P. ; Nyberg, L. ; Wide, L. ; Gemzell, C.

    Amsterdam : Elsevier
    Staff View
    ISSN:
    0005-2795
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Biology
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  7. 7
    Nyberg, L. ; Viotti, S.

    Amsterdam : Elsevier
    Staff View
    ISSN:
    0022-1996
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Economics
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  8. 8
    Nyberg, L. ; Jones, I.

    Amsterdam : Elsevier
    Staff View
    ISSN:
    0022-4731
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Biology
    Chemistry and Pharmacology
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  9. 9
    Staff View
    ISSN:
    0022-4731
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Biology
    Chemistry and Pharmacology
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  10. 10
    Nyberg, L. ; Nilsson, L.-G. ; Backman, L.

    Amsterdam : Elsevier
    Staff View
    ISSN:
    0001-6918
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Psychology
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  11. 11
    Nyberg, L. ; Dahlberg, E.

    Amsterdam : Elsevier
    Staff View
    ISSN:
    0304-4165
    Keywords:
    (Mouse skeletal muscle) ; ACTH ; Glucocorticoid receptor ; Hormone binding
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Biology
    Chemistry and Pharmacology
    Medicine
    Physics
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  12. 12
    Staff View
    ISSN:
    1433-2965
    Keywords:
    Key words: Cerebrovascular disorders – Complications – Fractures – Immobilization – Osteoporosis – Redistribution
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Medicine
    Notes:
    Abstract: Fractures are a common and serious complication after stroke and the risk of hip fractures among stroke patients is 2 to 4 times greater than among other elderly people. The aim of this study was to investigate prospectively the change in bone mineral density (BMD) after severe stroke and to study the association between motor impairment, disability and the development of hemiosteoporosis. The study comprised 24 stroke patients, with no persistent paresis from previous strokes or previous osteoporotic fractures, included 1 month after stroke onset. BMD, motor function, ambulation and activities of daily living (ADL) were assessed at 1, 4, 7 and 12 months after stroke onset. At inclusion, the patients’ BMD was normal for their age. During the study, there was a significant loss of BMD in the total body (−2.0%; p〈0.05), but not in the head or spine. BMD differed significantly between the paretic and the non-paretic arm at inclusion (−4.8%; p〈0.001). Decrease in BMD was most pronounced in the affected humerus (−17.4%; p〈0.001) and proximal femur (−12.2%; p〈0.01). BMD decreased significantly in both lower extremities during follow-up, but the losses were more pronounced on the paretic side (p〈0.01). In the nonaffected ultradistal radius there was a significant increase in BMD from inclusion to the end of the study (+5.8%; p〈0.01). There was no pattern in the bone losses correlating with presumptive risk factors for hemiosteoporosis such as motor function, ability to perform ADL or ambulation. Two patients had fractures at follow-up, both on the paretic side. Loss of bone mineral density in the paretic extremities is thus pronounced and progressive during the first year after stroke, indicating that loss of BMD is probably an important risk factor for post-stroke fractures. Surprisingly, BMD in the nonaffected arm increased significantly during the first year after stroke, most likely due to increased physical activity, and perhaps a redistribution of bone minerals from the paretic extremities.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  13. 13
    Staff View
    ISSN:
    1433-2965
    Keywords:
    Key words: Accidental falls; Cerebrovascular disorders; Complications; Fractures; Osteoporosis
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Medicine
    Notes:
    Abstract. Fractures are a serious complication after stroke. Among patients with femoral neck fractures, a large subgroup have had a previous stroke. This study aimed to investigate the incidence of fractures after stroke. Included in the study were 1139 patients consecutively admitted for acute stroke. Fractures occurring from stroke onset until the end of the study or death were registered retrospectively. Hip fracture incidence was compared with corresponding rates from the general population. Patients were followed up for a total of 4132 patient-years (median 2.9 years). There were 154 fractures in 120 patients and median time between the onset of stroke and the first fracture was 24 months. Women had significantly more fractures than men (χ2 = 15.6; p 〈 0.001). In patients with paresis most of the fractures affected the paretic side (χ2 = 22.5; p 〈 0.001) and 84% of the fractures were cause by falls. Hip fracture was the most frequent fracture and the incidence was 2–4 times higher in stroke patients compared with the reference population. Fractures are thus a common complication after stroke. They are usually caused by falls and affect the paretic side. It is necessary to focus on the prevention of post-stroke fractures, including the prevention of both falls and osteoporosis.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  14. 14
    Andersson, K. -E. ; Nyberg, L. ; Dencker, H. ; Göthlin, J.
    Springer
    Published 1975
    Staff View
    ISSN:
    1432-1041
    Keywords:
    Digoxin ; portal venous sampling ; absorption rate ; oral administration ; intrasigmoid administration
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Chemistry and Pharmacology
    Medicine
    Notes:
    Summary The absorption of digoxin has been studied in fasting patients undergoing transumbilical, portal catheterization for diagnostic purposes. A purely aqueous solution was administered orally in 4 patients and in the sigmoid colon in 2 patients. Blood samples were taken simultaneously from the portal and a peripheral vein. Plasma digoxin concentrations were determined by radioimmunoassay. Digoxin appeared early in the blood after oral administration; the average peak of porto-peripheral concentration differences was at 18 min. After intrasigmoid administration, absorption was slower, and no distinct peaks were found. Calculation of the mean amounts absorbed showed that half the dose had been absorbed via the portal vein during 2 hours in the oral study and during 6 hours in the intrasigmoid test. Approximately 2/3 of the dose had been absorbed during 6 hours after oral dosing. The absorption rate was estimated taking into account the decreasing amount of drug left to be absorbed at different times. After oral administration, the mean peak rate was found to correspond to an absorption half-time of 0.78 h, which was more than 20 times faster than the rate after 6 h. The mean peak rate after intrasigmoid administration appeared to be about 1/3 of that after oral dosing. Physiological factors that might account for these differences in absorption rate are discussed.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  15. 15
    Staff View
    ISSN:
    1432-1041
    Keywords:
    Terbutaline ; Bambuterol ; Cerebrospinal fluid ; plasma ; human ; adverse effects®
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Chemistry and Pharmacology
    Medicine
    Notes:
    Summary Concentrations in cerebrospinal fluid (CSF) and plasma of bambuterol and its active metabolite, the β2-adrenoceptor agonist terbutaline, were measured in man after four once-daily doses of 30 mg bambuterol hydrochloride (Bambec®). Nine patients scheduled for orthopaedic surgery under spinal anaesthesia completed the study. The concentrations of both substances were much lower in CSF than in plasma, the ratio CSF/plasma being 0.09 for bambuterol and 0.19 for terbutaline, at apparent steady state. While the rank order of the ratios was expected from the fractions of unbound bambuterol and terbutaline in plasma, their absolute values were only about 1/6 (bambuterol) and 1/4 (terbutaline) of those predicted from diffusion equilibria between plasma and CSF. Thus, the rates of transport of bambuterol and terbutaline from plasma into the central nervous system appear to be slow relative to transport out of the system, e.g. by outflow of CSF. The findings are in agreement with animal experiments and suggest that bambuterol and terbutaline are less likely than lipophilic β2-adrenoceptor agonists to interact with central receptors.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  16. 16
    Wettrell, G. ; Andersson, K. -E. ; Nyberg, L.
    Springer
    Published 1976
    Staff View
    ISSN:
    1432-1041
    Keywords:
    Digoxin ; exchange transfusion ; pharmacokinetics ; neonates ; 86Rb assay
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Chemistry and Pharmacology
    Medicine
    Notes:
    Summary By means of an86Rb-uptake inhibition assay, changes in the plasma concentration of digoxin and the amount of the glycoside removed during exchange transfusion have been studied in two newborns. For comparison, the exchange procedure was simulated by a computer on the basis of a two-compartment open model and available pharmacokinetic constants. A rapid decrease in plasma digoxin concentration during exchange transfusion was found when the glycoside was administered intravenously or intramuscularly within 60 min before the procedure. The amount of digoxin removed by the exchange was less than 6 per cent of the given dose. Computer simulation of the procedure also showed removal of only a minor amount of digoxin. It is concluded that the decrease in plasma concentration and the removal of only a small amount of glycoside by the exchange transfusion can be attributed mainly to extensive tissue distribution of digoxin. The results imply that replacement of digoxin after an exchange transfusion seems unnecessary.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  17. 17
    Nyberg, L. ; Wettrell, G.
    Springer
    Published 1980
    Staff View
    ISSN:
    1432-1041
    Keywords:
    digoxin ; neonates ; infants ; pharmacokinetics ; dosage schedules
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Chemistry and Pharmacology
    Medicine
    Notes:
    Summary As a therapeutic principle, a disease should be treated with the lowest effective dose of a drug. Accumulating information indicates that satisfactory contractile response of the myocardium is produced in young paediatric patients by doses of digoxin below existing recommendations. In addition, toxicity appears to be more frequent in neonates and infants treated with digoxin than previously thought. Therefore, dose calculations have been performed, based on pharmacokinetic parameters, with the aim of reaching and maintaining an average serum concentration of the glycoside of 2 nmol/l. This level is common in infants (〉1 month of age) during digoxin maintenance therapy and its adequacy is well supported by experience from adult cardiac patients. The calculations show that although current dosage schedules maintain the desired digoxin serum level in infants, they are often excessive for digitalization purposes. In neonates, the prevailing schemes do not sufficiently consider the immature state of the eliminating organs. Overdigitalization could therefore easily occur and continue in these patients, particularly in the premature newborns. This is in agreement with toxicity reports in the literature. The calculated doses should be less hazardous by being better adapted to the eliminating capacity of the various paediatric age-groups.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  18. 18
    Staff View
    ISSN:
    1573-2568
    Keywords:
    alkaline sphingomyelinase ; intestine ; bile ; human beings ; species differences
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Medicine
    Notes:
    Abstract The alkaline sphingomyelinase (SMase) was first found in rat intestinal brush border. The important roles of this enzyme in digestion of sphingomyelin and in mucosal cell proliferation have been suggested. In the present work, the distribution of the alkaline SMase in the tissues of human beings and animals have been studied. By assaying the enzyme activity in human biopsy samples, we found that the alkaline SMase activity was absent in the stomach, increased in the duodenum, present at high levels in the small intestine, and slightly declined in the colon and rectum. High activities were found similarly in the intestinal contents of the healthy adults and infants. The activities were also found in the intestinal mucosa of rats, normal and germ-free mice, and hamsters with the same distribution pattern as in humans, but not in the intestinal mucosa of guinea pigs. Apart from the intestinal tract, a SMase activity preferring alkaline pH was identified in human and guinea pig bile, but not in the bile of rat, pig, sheep, and cow. No activity was found in either pancreatic tissue or pancreatic juice in all species tested, and none was detected in human urine and milk. In conclusion, alkaline SMase exists predominantly in the digestive system with considerable tissue and species differences.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses