Reliability analysis of time series force plate data of community dwelling older adults

Frequency-based analysis of body sway has been used to distinguish between healthy young, healthy elderly adults and elderly adults with Huntingtons disease. Our aim was to assess the reliability of spectral-based outcomes of the centre of pressure (CoP) kinematics in order to determine if these outcomes could be tested for their capability to distinguish between elderly fallers and non-fallers in a future study. We have studied balance for 30 community dwelling healthy older adults 60 years or older. Four test conditions were used. Three successive trials were performed for each condition. CoP kinematics were estimated with a force platform with three strain gauges set in a triangular position. The frequency content of these signals was estimated. Intrasession correlation coefficients (ICC's) were then calculated for all test conditions. The reliability of the selected parameters varied between low and high (ICC 0.652-0.939). The ICC's for the narrow stance tests were higher compared to tests with normal standing conditions (0.771-0.94) to (0.652-0.865). The highest value was obtained in the high frequency band (0.939). These measures should be viewed with caution when screening geriatric patients because their reliability cannot always be assumed

Sleepiness and fatigue in multiple sclerosis - same same but different? A systematic review on the Epworth Sleepiness Scale as an assessment tool

Objectives: Fatigue is a frequent and distressing symptom in patients with multiple sclerosis (MS). In contrast, sleepiness, characterized by difficulties to stay awake and alert during the day, seems to be less prevalent in MS; however exact studies are lacking. In addition, there is a semantic confusion of the concepts of “fatigue” and “sleepiness”, which are often used interchangeably. Methods: We conducted a systematic review of studies using the Epworth Sleepiness Scale (ESS) for the assessment of daytime sleepiness in patients with MS. Results: The summarized results of 48 studies demonstrate that sleepiness, as indicated by elevated ESS scores, is less prevalent and less severe than fatigue but is present in a significant proportion of patients with MS. In most cross-sectional and longitudinal studies, there was a moderate association between ESS scores and various fatigue rating scales. Longitudinal studies on the effect of wakefulness- promoting agents failed to show a consistent improvement of sleepiness or fatigue as compared to placebo. It has also been shown that daytime sleepiness is frequently associated with comorbid sleep disorders that are often underrecognized and undertreated in MS. Conclusions: Sleepiness and potential sleep disorders may also precipitate and perpetuate fatigue in patients with MS and should be part of the differential diagnostic assessment. To support an appropriate decision-making process, we propose an algorithm for the evaluation of sleepiness as compared to fatigue in patients with MS. Disclosure: Nothing to disclose

Self-assessment of quality of life and aging of Alzheimer development risk adults

ABSTRACT: middle-age adult carriers and non-carriers of mutation E280A in gene Presenilin 1 for Early Onset Familial Alzheimer’s Disease and of elderly adults in Antioquia-Colombia. Study conducted from January 2005 to June 2007. Methodology: descriptive transversal study in which 162 asymptomatic people at risk of developing Alzheimer’s disease as a genetic consequence or as a consequence of the process of aging. They were subdivided into three groups: 27 carriers of the mutation, 39 non-carriers and 96 elderly adults. The study was conducted at the Neuroscience Group in Medellín (Antioquia) and at a gerontology center in Envigado (Antioquia) named Atardecer. Social-demographic characteristics were analyzed and quality of life and overall aging selfassessment tests were applied, which included the World Health Organization Quality of Life, and the Nürnberg -Self-Evaluation-List respectively. Statistic Analysis: The groups were described and they were compared to the variables of the study using Kruskall Wallis non-parametric ANOVA and Mann-Whitney’s U-test. Results: the mean scores of the instruments to assess quality of life and overall aging of three groups of participants were above 50 points and below 55 points respectively. Conclusions: elderly adults assessed themselves as having a lower quality of life than carriers and non-carriers, especially in the physical health area, and in their perception of aging, in spite of carriers’ conditions, although in general the scores were good in all the groups.RESUMEN: Describir la autovaloración de calidad de vida y del envejecimiento de tres grupos: adultos portadores y no portadores de la mutación E280A en el gen de la Presenilina 1 para Enfermedad de Alzheimer Familiar Precoz, y adultos mayores, en Antioquia-Colombia, estudio realizado entre enero de 2005 y junio de 2007. Metodología: estudio descriptivo transversal donde participaron 162 personas asintomáticas en riesgo de desarrollar Enfermedad de Alzheimer como consecuencia genética o del proceso de envejecimiento, quienes se subdividieron en tres grupos: 27 portadores, 39 no portadores y 96 adultos mayores. Investigación realizada en el Grupo de Neurociencias de la Universidad de Antioquia (Medellín) y en el Centro Gerontológico Atardecer (Envigado). Se analizaron las características sociodemográficas, y se aplicaron pruebas para la autovaloración de la calidad de vida global del envejecimiento: World Health Organization Quality of Life y la Nürnberg -Self-Evaluation-List respectivamente. Análisis estadístico: Se describieron los grupos y se compararon frente a las variables de estudio utilizando el análisis de varianza no paramétrico de Kruskall Wallis y la prueba U de Mann-Whitney. Resultados: las calificaciones medias de los instrumentos para la autovaloración de calidad de vida y global del envejecimiento en los tres grupos de participantes, fueron superiores a 50 puntos e inferiores a 55 puntos respectivamente. Conclusiones: los adultos mayores se autovaloran con menor calidad de vida que los portadores y los no portadores, especialmente en el área de salud física, al igual que en la percepción del envejecimiento, a pesar de las condiciones de los portadores, aunque, en general, todos los grupos las puntuaron bien

Cerebrospinal fluid findings in adults with acute Lyme neuroborreliosis

Presence of BB-specific antibodies in the cerebrospinal fluid (CSF) with evidence of their intrathecal production in conjunction with the white cell count in the CSF and typical clinical symptoms is the traditional diagnostic gold standard of Lyme neuroborreliosis (LNB). Few data are available on the CSF lactate concentration in European adults with the diagnosis of acute LNB. The objective of the study was to investigate the CSF changes during acute LNB. Routine CSF parameters [leukocyte count, protein, lactate and albumin concentrations, CSF/serum quotients of albumin (QAlb), IgG, IgA and IgM, and oligoclonal IgG bands] and the Borrelia burgdorferi (BB)-specific antibody index were retrospectively studied in relation to the clinical presentation in patients diagnosed with acute LNB. A total of 118 patients with LNB were categorized into the following groups according to their symptoms at presentation; group 1: polyradiculoneuritis (Bannwarth’s syndrome), group 2: isolated facial palsy and group 3: predominantly meningitic course of the disease. In addition to the CSF of patients with acute LNB, CSF of 19 patients with viral meningitis (VM) and 3 with neurolues (NL) were analyzed. There were 97 patients classified with definite LNB, and 21 as probable LNB. Neck stiffness and fever were reported by 15.3% of patients. Most of these patients were younger than 50 years. Polyradiculoneuritis was frequently found in patients older than 50 years. Lymphopleocytosis was found in all patients. Only 5 patients had a CSF lactate ≥3.5 mmol/l, and the mean CSF lactate level was not elevated (2.1 ± 0.6 mmol/l). The patients with definite LNB had significantly higher lactate levels than patients with probable LNB. Elevated lactate levels were accompanied by fever and headache. In the Reiber nomograms, intrathecal immunoglobulin synthesis was found for IgM in 70.2% followed by IgG in 19.5%. Isoelectric focussing detected an intrathecal IgG synthesis in 83 patients (70.3%). Elevated BB AIs in the CSF were found in 97 patients (82.2%). Patients with VM showed lower CSF protein concentration and CSF/serum quotients of albumin than LNB patients. In acute LNB, all patients had elevated cerebrospinal fluid (CSF) leukocyte counts. In contrast to infections by other bacteria, CSF lactate was lower than 3.5 mmol/l in all but 5 patients. The CSF findings did not differ between polyradiculoneuritis, facial palsy, and meningitis. The CSF in LNB patients strongly differed from CSF in VM patients with respect to protein concentration and the CSF/serum albumin quotient

Mechanical stability of the CMS strip tracker measured with a laser alignment system

Peer reviewe

Search for black holes and other new phenomena in high-multiplicity final states in proton-proton collisions at root s=13 TeV

Peer reviewe

Search for Dark Matter and Supersymmetry with a Compressed Mass Spectrum in the Vector Boson Fusion Topology in Proton-Proton Collisions at root s=8 TeV

Peer reviewe

Multiplicity and rapidity dependence of strange hadron production in pp, pPb, and PbPb collisions at the LHC

Peer reviewe

Search for heavy resonances decaying to two Higgs bosons in final states containing four b quarks

A search is presented for narrow heavy resonances X decaying into pairs of Higgs bosons (H) in proton-proton collisions collected by the CMS experiment at the LHC at root s = 8 TeV. The data correspond to an integrated luminosity of 19.7 fb(-1). The search considers HH resonances with masses between 1 and 3 TeV, having final states of two b quark pairs. Each Higgs boson is produced with large momentum, and the hadronization products of the pair of b quarks can usually be reconstructed as single large jets. The background from multijet and t (t) over bar events is significantly reduced by applying requirements related to the flavor of the jet, its mass, and its substructure. The signal would be identified as a peak on top of the dijet invariant mass spectrum of the remaining background events. No evidence is observed for such a signal. Upper limits obtained at 95 confidence level for the product of the production cross section and branching fraction sigma(gg -> X) B(X -> HH -> b (b) over barb (b) over bar) range from 10 to 1.5 fb for the mass of X from 1.15 to 2.0 TeV, significantly extending previous searches. For a warped extra dimension theory with amass scale Lambda(R) = 1 TeV, the data exclude radion scalar masses between 1.15 and 1.55 TeV