Tag: nevin manimala

Front Neurosci. 2023 Aug 29;17:1227767. doi: 10.3389/fnins.2023.1227767. eCollection 2023.

ABSTRACT

BACKGROUND: Attention deficit and hyperactivity disorder (ADHD) is a neurodevelopmental disorder characterized by core symptoms of inattention, and/or impulsivity and hyperactivity. In order to understand the basis for this multifaceted disorder, the investigation of sensory processing aberrancies recently reaches more interest. For example, during the processing of auditory stimuli comparable low sensory thresholds account for symptoms like higher distractibility and auditory hypersensitivity in patients with ADHD. It has further been shown that deficiencies not only exist on an intramodal, but also on a multimodal level. There is evidence that the visual cortex shows more activation during a focused auditory task in adults with ADHD than in healthy controls. This crossmodal activation is interpreted as the reallocation of more attentional resources to the visual domain as well as deficient sensory inhibition. In this study, we used, for the first time, electroencephalography to identify a potential abnormal regulated crossmodal activation in adult ADHD.

METHODS: 15 adult subjects with clinically diagnosed ADHD and 14 healthy controls comparable in age and gender were included. ERP components P50, P100, N100, P200 and N200 were measured during the performance of a unimodal auditory and visual discrimination task in a block design. Sensory profiles and ADHD symptoms were assessed with inattention as well as childhood ADHD scores. For evaluating intramodal and crossmodal activations, we chose four EEG channels for statistical analysis and group-wise comparison.

RESULTS: At the occipital channel O2 that reflects possible crossmodal activations, a significantly enhanced P200 amplitude was measured in the patient group. At the intramodal channels, a significantly enhanced N200 amplitude was observed in the control group. Statistical analysis of behavioral data showed poorer performance of subjects with ADHD as well as higher discrimination thresholds. Further, the correlation of the assessed sensory profiles with the EEG parameters revealed a negative correlation between the P200 component and sensation seeking behavior.

CONCLUSION: Our findings show increased auditory crossmodal activity that might reflect an altered stimulus processing resource allocation in ADHD. This might induce consequences for later, higher order attentional deployment. Further, the enhanced P200 amplitude might reflect more sensory registration and therefore deficient inhibition mechanisms in adults with ADHD.

PMID:37706153 | PMC:PMC10495991 | DOI:10.3389/fnins.2023.1227767

J Neurosci. 2023 Sep 13;43(37):6344-6356. doi: 10.1523/JNEUROSCI.0020-23.2023.

ABSTRACT

Long overlooked in neuroscience research, sex and gender are increasingly included as key variables potentially impacting all levels of neurobehavioral analysis. Still, many neuroscientists do not understand the difference between the terms “sex” and “gender,” the complexity and nuance of each, or how to best include them as variables in research designs. This TechSights article outlines rationales for considering the influence of sex and gender across taxa, and provides technical guidance for strengthening the rigor and reproducibility of such analyses. This guidance includes the use of appropriate statistical methods for comparing groups as well as controls for key covariates of sex (e.g., total intracranial volume) and gender (e.g., income, caregiver stress, bias). We also recommend approaches for interpreting and communicating sex- and gender-related findings about the brain, which have often been misconstrued by neuroscientists and the lay public alike.

PMID:37704386 | DOI:10.1523/JNEUROSCI.0020-23.2023

Int J Spine Surg. 2023 Sep 13:8530. doi: 10.14444/8530. Online ahead of print.

ABSTRACT

BACKGROUND: Pressure measurements to detect risks for pressure injuries in wheelchair users with spinal cord injury (SCI) have been available for quite some time. Unfortunately, knowledge of how postural changes during longer periods of daily life activity affecting the results is still limited. In the present study, the authors expected to note shifts in the center of pressure as well as in the pressure distribution, especially in patients who were able to change their position actively.

METHODS: A seat pressure mat (BodiTrak2) was used to perform measurements of 34 SCI wheelchair users after initial transfer into the wheelchair as well as 30 and 90 minutes later. Mean pressure, maximum pressure, pressure-loaded measuring surface, and the coordinates of the center of pressure were analyzed, and findings were statistically analyzed using the t test and Intraclass Correlation Coefficient. To quantify the drift of the measurement system, recordings with a reference weight were performed.

RESULTS: The analyzed parameters from the initial measurement differed significantly from the later measurements at 30 and 90 minutes, whereas the parameters were stable after 30 minutes. The measurements with the reference weight showed the same measurement course.

CONCLUSIONS: The measurements after 30 and 90 minutes were consistent, contrary to expectations. The activity of the participant between measurements did not appear to be of much importance.

CLINICAL RELEVANCE: Relief maneuvers appear to provide relief only while the maneuver is being performed. Thus, relief activities must be frequent enough and long enough to allow adequate blood flow to the tissues.

PMID:37704379 | DOI:10.14444/8530

Int J Spine Surg. 2023 Sep 13:8516. doi: 10.14444/8516. Online ahead of print.

ABSTRACT

Proximal junctional kyphosis and failure are not infrequent complications of adult spinal deformity reconstructions. Efforts to define proximal junctional kyphosis have ranged from expert opinions to statistical analyses of large databases. These approaches fail to recognize that proximal junctional kyphosis/failure/breakdown is likely a spectrum of manifestations secondary to spinal fusions and spinal alignment. The dichotomization (clinically irrelevant vs clinically relevant) of continuous measures will lead to misclassification and misdiagnosis. As adult spinal deformity moves to a precision-medicine-based approach (also known as personalized medicine), work is required to develop probabilistic models to inform patients and surgeons about the likely survivorship of a proximal junctional failure. As such, it is likely better to call proximal junctional segment kyphosis without symptoms “asymptomatic proximal junctional kyphosis” rather than to determine thresholds for “symptomatic” or “clinically relevant.”

PMID:37704378 | DOI:10.14444/8516

Ann Geriatr Med Res. 2023 Sep 14. doi: 10.4235/agmr.23.0132. Online ahead of print.

ABSTRACT

BACKGROUND: Individuals with frailty are susceptible to adverse events. Although a psychological correlation with frailty has been observed, few studies have investigated the link between stress and frailty. This study examined the association between perceived stress and frailty in older adults.

METHODS: This cross-sectional observational study included participants recruited between September 2021 and January 2022. The Korean version of the Perceived Stress Scale-10 was used to measure stress levels, while the frailty status was assessed using the Korean Frailty Index. Loneliness, depression, and satisfaction were measured using the UCLA Loneliness Scale, Centre for Epidemiological Studies Depression Scale, and Satisfaction with Life Scale, respectively. We used multinomial logistic regression to compare the variables between frail and robust participants.

RESULTS: Among 862 study participants (mean age, 73.62 years; 65.5% women), the mean PSS-10 score was 15.26, 10.8% were frail, 22.4% were pre-frail, and 66.8% were robust. Perceived stress was significantly associated with pre-frailty (crude odds ratio [cOR], 1.147; 95% confidence interval [CI] 1.093-1.204) and frailty (cOR, 1.417; 95% CI 1.322-1.520). After adjusting for sociodemographic factors, we examined the associations between perceived stress and prefrailty (adjusted odds ratio [aOR] 1.140, 95% CI 1.084-1.199) and frailty (aOR, 1.409; 95% CI 1.308-1.518). After adjusting for all variables, including loneliness, depression, and satisfaction, perceived stress was significantly associated with frailty (aOR, 1.172; 95% CI 1.071-1.283), however, insufficient statistical evidence was observed for pre-frailty (aOR, 1.022; 95% CI 0.961-1.086).

CONCLUSION: Higher levels of perceived stress were associated with frailty in older adults. Stress management efforts may help improve frailty in this population.

PMID:37704370 | DOI:10.4235/agmr.23.0132

Sex Transm Infect. 2023 Sep 13:sextrans-2023-055900. doi: 10.1136/sextrans-2023-055900. Online ahead of print.

ABSTRACT

OBJECTIVE: Macrolide and fluoroquinolone resistance in Mycoplasma genitalium (MG) is of emerging global concern. Compared with neighbouring countries such as Denmark, Sweden has had lower rates of macrolide resistance while fluoroquinolone resistance rates are less well documented. This study retrospectively examined macrolide, fluoroquinolone and multidrug resistance rates from Dalarna County, Sweden over a 13-year period.

METHODS: MG-positive samples from 2006 to 2018 from patients examined at the Department of Venereology, Central Hospital, Falun, Sweden were tested by sequencing for macrolide resistance mutations (MRM) and fluoroquinolone resistance-associated mutations (QRAM) in the parC and gyrA subunit regions. A subset of these samples from 2006 to 2011 have been reported on previously, although only for MRM.

RESULTS: Of 874 samples, 98 (11.2%, 95% CI 9.1% to 13.6%) had mutations associated with resistance to macrolides and 19 of 828 (2.3%, 95% CI 8.9% to 23.1%) to quinolones. Mutations associated with resistance to both drugs were detected in 5 of 828 (0.6%, 95% CI 0.1% to 1.4%) samples overall. A significant positive linear trend (p=0.004) for an increase in the rate of macrolide resistance was observed (from 0% in 2006 to 31% in 2018) while the increase in QRAM from 0% in 2006 to 12.3% in 2018 was not statistically significant.

CONCLUSIONS: Despite a decrease in macrolide and fluoroquinolone consumption in Sweden, there was an overall increase in MG macrolide, fluoroquinolone and dual resistance from 2006 to 2018, although the difference in fluoroquinolone resistance rates was not statistically significant. In order to maintain comparably low resistance rates, resistance-guided therapy for MG infections will be crucial.

PMID:37704364 | DOI:10.1136/sextrans-2023-055900

J Aging Stud. 2023 Sep;66:101158. doi: 10.1016/j.jaging.2023.101158. Epub 2023 Jul 13.

ABSTRACT

In this study, older characters that appeared in all the episodes of the first seasons of eight most popular Turkish TV series on prime-time televisions in Turkey and those appeared in all the episodes of the first seasons of eight “original” Turkish series on Netflix were submitted to a comparative quantitative and qualitative content analysis. In this sense, the aim of this study was to reveal what kind of old age is promised to viewers by such media environments as TV and Netflix. Findings revealed that, when compared to the Turkish population, older people were significantly underrepresented in prime-time series and that, in other words, they were symbolically eliminated and exposed to age discrimination. Another finding is that older people were portrayed more fairly on Netflix than TV. Although older individuals were inadequately represented on Netflix as well, the difference between the two platforms was not statistically significant. On the other hand, while older women are significantly less represented than older men on both platforms, the study found no significant difference in gender representation between Netflix and prime-time TV. The findings also indicated that no older character, when evaluated qualitatively, was represented as the major character on either platforms and that, especially when it comes to having a profession, older people, specifically older women, were portrayed more negatively on both platforms, which means that older women faced a double jeopardy.

PMID:37704276 | DOI:10.1016/j.jaging.2023.101158

J Appl Gerontol. 2023 Sep 13:7334648231196850. doi: 10.1177/07334648231196850. Online ahead of print.

ABSTRACT

Poor financial and health literacy and poor psychological well-being are significant correlates of scam susceptibility in older adults; yet, no research has examined whether interventions that target these factors may effectively reduce susceptibility. Using longitudinal data from older adults in the Rush Memory and Aging Project (MAP) (N = 1,231), we used microsimulations to estimate the causal effect of hypothetical well-being and literacy interventions on scam susceptibility over six years. Microsimulations can simulate a randomized trial to estimate intervention effects using observational data. We simulated hypotheticalinterventions that improved well-being or literacy scores by either 10% or 30% from baseline, or to the maximum scores, for an older adult population and for income and education subgroups. Simulations suggest thathypotheticalinterventions that increase well-being or literacy cause statistically significant reductions in scam susceptibility of older adults over time, but improving well-being caused a greater-albeit not significantly different-reduction compared to improving literacy.

PMID:37704219 | DOI:10.1177/07334648231196850

J Phys Act Health. 2023 Sep 13:1-8. doi: 10.1123/jpah.2022-0471. Online ahead of print.

ABSTRACT

BACKGROUND: Recent statistical approaches have allowed consideration of the integrated relationships between sedentary behavior (SB) and physical activity (PA) with different health outcomes. The present paper aimed to systematically review the literature and synthesize evidence about associations between hypothetical reallocations from SB to different PA intensities and cardiovascular risk factors in youth.

METHODS: A systematic search of 8 databases was performed. Observational studies with a population of children and/or adolescents and based on statistical analysis that investigated the associations between time reallocations from SB to PA and cardiovascular risk factors were included.

RESULTS: Twenty-eight studies met the inclusion criteria. Level of evidence (derived from cross-sectional studies) indicated that the reallocation from SB to moderate to vigorous PA was beneficially associated with adiposity, cardiorespiratory fitness, and cardiometabolic biomarkers in youth. Reallocation from SB to light PA was not associated with the analyzed outcomes. Associations derived from longitudinal studies were mostly inconclusive.

CONCLUSION: Cardiovascular risk factors could be improved by increasing moderate to vigorous PA at the expense of time spent in SB in pediatric populations. Prospective studies or studies investigating the effects of reallocating sedentary bouts to PA are needed.

PMID:37704195 | DOI:10.1123/jpah.2022-0471

Sci Total Environ. 2023 Sep 11:166930. doi: 10.1016/j.scitotenv.2023.166930. Online ahead of print.

ABSTRACT

Nitrous oxide (N₂O) is a potent greenhouse gas that also contributes to ozone depletion. Recent studies have identified river corridors as significant sources of N₂O emissions. Surface water-groundwater (hyporheic) interactions along river corridors induce flow and reactive nitrogen transport through riparian sediments, thereby generating N₂O. Despite the prevalence of these processes, the controlling influence of physical and geochemical parameters on N₂O emissions from coupled aerobic and anaerobic reactive transport processes in heterogeneous riparian sediments is not yet fully understood. This study presents an integrated framework that combines a flow and multi-component reactive transport model (RTM) with an uncertainty quantification and sensitivity analysis tool to determine which physical and geochemical parameters have the greatest impact on N₂O emissions from riparian sediments. The framework involves the development of thousands of RTMs, followed by global sensitivity and responsive surface analyses. Results indicate that characterizing the denitrification reaction rate constant and permeability of intermediate-permeability sediments (e.g., sandy gravel) are crucial in describing coupled nitrification-denitrification reactions and the magnitude of N₂O emissions. This study provides valuable insights into the factors that influence N₂O emissions from riparian sediments and can help in developing strategies to control N₂O emissions from river corridors.

PMID:37704143 | DOI:10.1016/j.scitotenv.2023.166930