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Mental fatigue, ‘brain fog’, and difficulties maintaining engagement are commonly reported issues in a range of neurological and psychiatric conditions. Traditional sustained attention tasks commonly measure this capacity as the ability to detect target stimuli based on sensory features in the auditory or visual domains. However, with this approach, discrete target stimuli may exogenously capture attention to aid detection, thereby masking deficits in the ability to endogenously sustain attention over time.
Methods:
To address this, we developed the Continuous Temporal Expectancy Task (CTET) where individuals continuously monitor a stream of patterned stimuli alternating at a fixed temporal interval (690 ms) and detect an infrequently occurring target stimulus defined by a prolonged temporal duration (1020 ms or longer). As such, sensory properties of target and non-target stimuli are perceptually identical and differ only in temporal duration. Using the CTET, we assessed stroke survivors with unilateral right hemisphere damage (N = 14), a cohort in which sustained attention deficits have been extensively reported.
Results:
Stroke survivors had overall lower target detection accuracy compared with neurologically healthy age-matched older controls (N = 18). Critically, stroke survivors performance was characterised by significantly steeper within-block performance decrements, which occurred within short temporal windows (˜3 ½ min), and were restored by the break periods between blocks.
Conclusions:
These findings suggest that continuous temporal monitoring taxes sustained attention processes to capture clinical deficits in this capacity over time, and outline a precise measure of the endogenous processes hypothesised to underpin sustained attention deficits following right hemisphere stroke.
In this paper, we propose an efficient diagnostic technique for determining spatially resolved measurements of the ion density ratio in a magnetized two-ion species plasma. Shear Alfvén waves were injected into a mixed helium–neon plasma using a magnetic loop antenna, for frequencies spanning the ion cyclotron regime. Two distinct propagation bands are observed, bounded by $\omega < \varOmega _\textrm {Ne}$ and $\omega _{ii} < \omega < \varOmega _\textrm {He}$, where $\omega _{ii}$ is the ion–ion hybrid cutoff frequency and $\varOmega _\textrm {He}$ and $\varOmega _\textrm {Ne}$ are the helium and neon cyclotron frequencies, respectively. A theoretical analysis of the cutoff frequency was performed and shows it to be largely unaffected by kinetic electron effects and collisionality, although it can deviate significantly from $\omega _{{ii}}$ in the presence of warm ions due to ion finite Larmor radius effects. A new diagnostic technique and accompanying algorithm was developed in which the measured parallel wavenumber $k_\parallel$ is numerically fit to the predicted inertial Alfvén wave dispersion in order to resolve the local ion density ratio. A major advantage of this algorithm is that it only requires a measurement of $k_\parallel$ and the background magnetic field in order to be employed. This diagnostic was tested on the Large Plasma Device at UCLA and was successful in yielding radially localized measurements of the ion density ratio.
Correct diagnosis of cause of death is necessary to suggest the most effective management interventions to reduce perinatal lamb mortality. Haemorrhage on the surface of the brain has been used as a field diagnostic tool to allocate lambs to a cause of death category, but the usefulness of this method was unclear. This study aimed to evaluate whether gross pathology was related to neuronal death and whether haemorrhage of the central nervous system (CNS) was distinct between differing causes of death, enabling indicators to be used in field diagnoses. Lambs dying from natural causes (n = 64) and from euthanasia (n = 7) underwent postmortem examination, then the brain and spinal cord were extracted and examined histologically. Histological changes consistent with neuronal death were not detected in any lamb. Haemorrhage of the meninges and/or parenchyma of the CNS occurred in all lambs. The age of the haemorrhage indicated that it occurred near the time of death in most lambs. Dilation of blood vessels varied in severity but appeared to be unrelated to causal diagnosis, severity of subcutaneous oedema, breathing or milk status. Moderate or severe dilation of blood vessels and haemorrhage of the CNS did not occur in all lambs with alternative clear indicators of dystocia and occurred in all death classifications, so it could not be used as diagnostic indicators for classification of cause of death. Dilation and haemorrhage were unrelated to neuronal damage and may have been artefactual. In conclusion, haemorrhage of the CNS was not indicative of neuronal damage and could not be used to distinguish between lambs with clear indicators of differing causes of death, so it is not recommended as a field diagnostic tool.
With one in ten young people being affected by ill mental health and stigma regularly cited as a factor affecting access to early intervention services, focussing resources on school based stigma reduction strategies seems prudent. ‘Headucate’, a student society, designed a 50 minute workshop which aims to increase mental health literacy and decrease stigma.
Methodology
Repeated, cross sectional surveys were carried out at three time points; 1) immediately before (n=77), 2) Immediately after (n=81) and 3) three months post workshop (n=73). The surveys were paper based versions of the Reported Intended Behaviours Score (RIBS) and Mental Health Knowledge Scale (MAKS) utilising a social distance scale.
Results
Four year 10 classed (pupils aged 14-15) were recruited. Post hoc t-tests were carried out when one-way ANOVAS were significant.
Disorder knowledge (from MAKS) and intended contact (from RIBS) significantly increased between time points one and two (p<0.01 and <0.004 respectively) but then decreased.
Analysis of the question pertaining to knowing where to access help showed a statistically significant increase (p<0.001) between time points one and two and then a decrease at time three, albeit to a higher value than at time point one (3.45 compared to 3.13, P=0.088).
Discussion
Headucate workshops offer a low resource option which is well accepted by students. Like other school based stigma reduction strategies, a dramatic increase was seen between immediately before and after indicating that the workshop resonates with the pupils, but there was little sustained change in attitudes.
Against a backdrop of poor mental health education in UK schools a group of students from Norwich Medical School have formed a student society called ‘Headucate’ in order to create, deliver and evaluate an educational intervention for adolescents, initially to be delivered in Norfolk schools.
Objectives:
To create an educational intervention that:
Is the length of a standard lesson
Is age appropriate and acceptable
Contains appropriate signposting
Contains content that challenges common myths and replaces them with knowledge
Contains content that encourages empathy and understanding towards those with mental illnesses
Is easily delivered in the same way each time so that its effectiveness can be evaluated
Aim:
To create an intervention effective at tackling stigma and empowering adolescents to recognise signs of poor mental health and access services appropriately.
Methods:
Lesson plan created after consultation with psychiatrists, a psychologist, a GP, a university outreach professional, a teacher and secondary school age children, then trialled and revised.
Results:
Interactive workshop produced with 5 sections.
1) Myth vs Fact activity that dispels prevalent myths
2) Scenario based activity to demonstrate that mental health is a spectrum
3) An interactive presentation covering the most common mental illnesses and their symptoms
4) An activity focusing on talking to those with mental illnesses, furthering the scenario from the previous activity
5) A question and answer session. Every student leaves with a leaflet containing appropriate signposting.
Conclusion:
We have created an educational intervention ready to be delivered and evaluated.
GXR, a selective α2A-adrenergic agonist, is a non-stimulant treatment for ADHD (approved in the USA for children and adolescents and in Canada for children).
Objectives:
To assess the efficacy (symptoms and function) and safety of dose-optimized GXR compared with placebo in children and adolescents with ADHD.
Aims:
To evaluate the efficacy (symptom and function) and safety of GXR for the treatment of ADHD. An atomoxetine (ATX) arm was included to provide reference data against placebo (NCT01244490).
Methods:
Patients (6–17 years) were randomly assigned at baseline to dose-optimized GXR (6–12 years, 1–4 mg/day; 13–17 years, 1–7 mg/day), ATX (10–100mg/day) or placebo for 4 or 7 weeks. The primary efficacy measure is change from baseline in ADHD-Rating Scale-version IV (ADHD-RS-IV). Key secondary measures were defined as Clinical Global Impressions-Improvement (CGI-I) and the Weiss Functional Impairment Rating Scale-Parent (WFIRS-P). Safety assessments included treatment-emergent adverse events (TEAEs), electrocardiograms, and vital signs.
Results:
Of 338 patients randomized, 272 (80.5%) completed the study. Placebo-adjusted differences in least squares (LS) mean in ADHD-RS-IV total score, percent improvement versus placebo for CGI-I, placebo-adjusted differences in LS mean change from baseline in WFIRS-P score (family and learning and school domains) are shown in the Table. The most common TEAEs for GXR were somnolence, headache, and fatigue; 8 (7%) TEAEs were severe.
Conclusions:
GXR was effective and well tolerated in children and adolescents with ADHD.
GXR
ATX
Placebo-adjusted difference in LS mean change from baseline in ADHD-RS-IV total score (95% Cl, p-value; effect size)
−8.9 (−11.9, −5.8, p<0.001; 0.76)
−3.8 (−6.8, −0.7, p<0.05; 0.32)
Difference in improvement from placebo for CGI-I (95% Cl, p-value)
23.7% (11.1, 36.4; p<0.001)
12.1% (−0.9, 25.1; p<0.05)
Placebo-adjusted difference in LS mean change from baseline in WFIRS-P; learning and school domain score (95%CI, p-value; effect size)
−0.22 (−0.36, −0.08, p<0.01; 0.42)
−0.16 (−0.31, −0.02, p<0.05; 0.32)
Placebo-adjusted difference in LS mean change from baseline in WFIRS-P; family domain score (95%CI, p-value; effect size)
Mental health education is not compulsory in the UK therefore adolescents have very varied experiences despite half of people with mental health illnesses reporting having experienced symptoms by 14 years old. University students are ideal for delivering a relaxed, educational intervention aimed at this age group, providing an opportunity to for them to learn necessary tools for recognising signs of poor mental health and tackle associated stigma.
Aim:
To expand Headucate's membership, including other disciplines within the University of East Anglia (UEA) and provide core training enabling members to deliver a school-based educational intervention
Methods:
Recruitment of members has been a multifaceted approach utilising social media sites such as Facebook and the Headucate website, and oncampus events and ‘awareness campaigns’ including several successful evening talks and lectures.
Three training sessions, which include ‘Introduction to Mental Health’, ‘Workshop run-through’ and ‘Child Protection’, have been developed for all members wishing to partake in the delivery of workshops.
Results:
We have recruited approximately 300 members since summer 2012; 70 fully paid members in 2012/13 academic year and currently 45 paid members for 2013/14.
A total of 18 members are fully trained and ready to deliver workshops within schools and 17 other members have just one training session remaining.
Conclusions:
We are looking forward to delivering our first workshops in October and building on a successful first year. We are confident we can provide workshops for approximately 600 children per year.
The symptoms of many mental illnesses often begin during high school. Interventions to improve mental health awareness amongst adolescents may lead to improved outcomes. in the UK unfortunately many schools do not fulfil this need and mental health education is not a compulsory part of the curriculum.
Aim:
To develop and measure the effectiveness of and educational intervention designed to raise awareness and empower adolescents to recognise signs of poor mental health and access services appropriately.
Objectives:
Evaluate the effectiveness of the intervention through baseline and follow up surveys.
Methods:
Students at Norwich Medical School collaborated with teachers, psychiatrists and general practitioners to design an educational intervention that aims to tackle stigma and raise awareness of mental health conditions among 13-14 year olds in the hope that they can access services when needed, support those around them and look after their mental health. To evaluate effectiveness of the intervention, a knowledge, attitudes and practices survey that utilises a social distance scale that has been adapted for this age group and will be used to gather baseline and follow up data after six months.
Results:
We have developed a one-hour educational intervention delivered by medical students, that uses a variety of teaching techniques to raise awareness of mental health issues. We will start implementation in January 2013 so will have baseline effectiveness results shortly after.
Conclusions:
Headucate has the potential to fill an important gap in effectively raising awareness of mental health issues in schools.
GXR, a selective α2A-adrenergic agonist, is a non-stimulant ADHD treatment approved in the USA for children and adolescents, and in Canada for children.
Objectives:
To evaluate long-term maintenance of efficacy of GXR in children and adolescents with ADHD who respond to an initial open-label, short-term trial.
Aims:
To determine if there is a higher rate of treatment failure for placebo vs GXR during the double-blind randomised-withdrawal phase (RWP) (NCT01081145).
Methods:
Patients (6–17 years) meeting DSM-IV-TR criteria for ADHD, baseline ADHD Rating Scale-IV (ADHD-RS-IV) ≥32 and Clinical Global Impressions-Severity (CGI-S) ratings ≥4 were enrolled. Following 7-week dose optimization and 6-week maintenance periods on open-label GXR (1–7 mg/day), eligible patients entered a 26-week, double-blind, RWP with GXR or placebo. The primary endpoint was rate of treatment failure (≥50% increase in ADHD-RS-IV total score and ≥2-point increase in CGI-S at two consecutive visits, compared to the RWP baseline). The key secondary endpoint was time-to-treatment failure. Safety assessments included treatment-emergent adverse events (TEAEs), electrocardiograms and vital signs.
Results:
Of 528 patients enrolled, 316 (60.0%) entered the RWP. At study end, 49.3% (GXR) and 64.9% (placebo) (95%CI; −26.6, −4.5, p<0.01) of patients had relapsed (Figure). Time-to-treatment failure was 56 days (placebo) versus 218 days (GXR), p=0.003. During the RWP, the most common GXR TEAEs (≥5% patients) were headache, somnolence and nasopharyngitis.
Conclusions:
GXR demonstrated long-term maintenance of efficacy versus placebo in children and adolescents with ADHD.
The apple leaf midge, Dasineura mali (Kieffer) (Diptera: Cecidomyiidae), an invasive alien pest established for many years in Nova Scotia, Canada, has invaded Ontario and British Columbia, Canada apple (Malus domestica Borkhausen; Rosaceae) orchards, damaging growing tips of trees. Molecular analysis indicated that Nova Scotia populations are genetically different from Ontario and British Columbia populations. Pheromone trap captures, oviposition on growing apple terminals, and the incidence of third instars indicate three D. mali generations in each province. Platygaster demades Walker (Hymenoptera: Platygastridae), released in Nova Scotia in 1993, parasitised 34% of the third midge generation in that province and was reared from D. mali for the first time in 2016 in the Fraser Valley of British Columbia. Lyrcus nigroaeneus Ashmead (Hymenoptera: Pteromalidae) parasitised up to 21% of D. mali in southwestern Ontario. Synopeas myles (Walker) (Hymenoptera: Platygastridae) was recorded from D. mali for the first time, one specimen in each of Nova Scotia and Ontario, and was the most important parasitoid in British Columbia. Synopeas myles parasitism in Okanagan and Similkameen, British Columbia orchards increased from 0% to a mean of 30% of D. mali larvae from 2014 to 2016. Other minor parasitoids included Platygaster tuberosula Kieffer (Hymenoptera: Platygasteridae) in all three provinces and Aphanogmus vicinus Förster (Hymenoptera: Ceraphronidae) in British Columbia.
Negative interactions between people and large carnivores are common and will probably increase as the human population and livestock production continue to expand. Livestock predation by wild carnivores can significantly affect the livelihoods of farmers, resulting in retaliatory killings and subsequent conflicts between local communities and conservationists. A better understanding of livestock predation patterns could help guide measures to improve both human relationships and coexistence with carnivores. Environmental variables can influence the intensity of livestock predation, are relatively easy to monitor, and could potentially provide a useful predictive framework for targeting mitigation. We chose lion predation of livestock as a model to test whether variations in environmental conditions trigger changes in predation. Analysing 6 years of incident reports for Pandamatenga village in Botswana, an area of high human–lion conflict, we used generalized linear models to show that significantly more attacks coincided with lower moonlight levels and temperatures, and attack severity increased significantly with extreme minimum temperatures. Furthermore, we found a delayed effect of rainfall: lower rainfall was followed by a significantly increased severity of attacks in the following month. Our results suggest that preventative measures, such as introducing deterrents or changing livestock management, could be implemented adaptively based on environmental conditions. This could be a starting point for investigating similar effects in other large carnivores, to reduce livestock attacks and work towards wider human–wildlife coexistence.
We examined whether morphological awareness made a significant contribution to word-level reading across Grades 1 to 4. We test these relations specifically in a task measuring awareness of past-tense forms. A total of 375 children from Grades 1 to 4 completed tasks assessing past-tense morphological awareness along with real word and pseudoword reading. Children also completed control measures assessing phonological awareness, phonological short-term memory, sentence-level language skills, and nonverbal cognitive ability. After these controls, past-tense morphological awareness was a significant predictor of real word reading in Grades 1 and 2, but not in Grades 3 and 4. Further, following on all controls, past-tense morphological awareness was a consistent predictor of pseudoword reading across Grades 1 to 4. Morphological awareness, at least as measured with past-tense verbs, appears to have a role in word reading across the early to middle elementary school grades; for young readers, there are relations to reading of both known and novel words, and for older readers, relations are significant specifically in reading novel words. These findings are discussed within the context of theories of word reading development.
Objectives: Long-term neurological response to treatment after a severe traumatic brain injury (sTBI) is a dynamic process. Failure to capture individual heterogeneity in recovery may impact findings from single endpoint sTBI randomized controlled trials (RCT). The present study re-examined the efficacy of erythropoietin (Epo) and transfusion thresholds through longitudinal modeling of sTBI recovery as measured by the Disability Rating Scale (DRS). This study complements the report of primary outcomes in the Epo sTBI RCT, which failed to detect significant effects of acute treatment at 6 months post-injury. Methods: We implemented mixed effects models to characterize the recovery time-course and to examine treatment efficacy as a function of time post-injury and injury severity. Results: The inter-quartile range (25th–75th percentile) of DRS scores was 20–28 at week1; 8–24 at week 4; and 3–17 at 6 months. TBI severity group was found to significantly interact with Epo randomization group on mean DRS recovery curves. No significant differences in DRS recovery were found in transfusion threshold groups. Conclusions: This study demonstrated the value of taking a comprehensive view of recovery from sTBI in the Epo RCT as a temporally dynamic process that is shaped by both treatment and injury severity, and highlights the importance of the timing of primary outcome measurement. Effects of Epo treatment varied as a function of injury severity and time. Future studies are warranted to understand the possible moderating influence of injury severity on treatment effects pertaining to sTBI recovery. (JINS, 2019, 25, 293–301)
Improving quality of life (QOL) for people with dementia is a priority. In care homes, we often rely on proxy ratings from staff and family but we do not know if, or how, they differ in care homes.
Methods
We compared 1056 pairs of staff and family DEMQOL-Proxy ratings from 86 care homes across England. We explored factors associated with ratings quantitatively using multilevel modelling and, qualitatively, through thematic analysis of 12 staff and 12 relative interviews.
Results
Staff and family ratings were weakly correlated (ρs = 0.35). Median staff scores were higher than family's (104 v. 101; p < 0.001). Family were more likely than staff to rate resident QOL as ‘Poor’ (χ2 = 55.91, p < 0.001). Staff and family rated QOL higher when residents had fewer neuropsychiatric symptoms and severe dementia. Staff rated QOL higher in homes with lower staff:resident ratios and when staff were native English speakers. Family rated QOL higher when the resident had spent longer living in the care home and was a native English. Spouses rated residents’ QOL higher than other relatives. Qualitative results suggest differences arise because staff felt good care provided high QOL but families compared the present to the past. Family judgements centre on loss and are complicated by decisions about care home placement and their understandings of dementia.
Conclusion
Proxy reports differ systematically between staff and family. Reports are influenced by the rater:staff and family may conceptualise QOL differently.
The correlation between ATP concentration and bacterial burden in the patient care environment was assessed. These findings suggest that a correlation exists between ATP concentration and bacterial burden, and they generally support ATP technology manufacturer-recommended cutoff values. Despite relatively modest discriminative ability, this technology may serve as a useful proxy for cleanliness.