Relative habituation and recovery of visual attention to orientation-movement compounds by newborn infants.

Previous research has demonstrated that newborn infants are capable of discriminating stationary objects based on one stimulus dimension. The present study asked the following questions: can newborns process spatial orientation changes?; does stimulus movement influence spatial orientation processing?; can stimulus movement changes be processed?; and can changes to two dimensions of a stimulus be detected? Forty-eight, 2-day-old newborns were administered successive presentations of either stationary or moving, high contrast, black-and-white square wave gratings (stripes) and their level of visual fixation was recorded. The results indicated that newborns are capable of detecting spatial orientation changes in stationary and moving stimuli. Moreover, the findings indicated that newborn infants were capable of detecting direction of movement changes. It was demonstrated that newborn infants could detect changes to two dimensions of a stimulus concurrently. It was concluded that newborns are capable of processing more than one stimulus dimension simultaneously, demonstrating that their information processing capabilities are more sophisticated than previously thought. Finally, it was hypothesized that newborns encode stimulus dimension information separately, but can integrate these memories during object discrimination tasks.Dept. of Psychology. Paper copy at Leddy Library: Theses & Major Papers - Basement, West Bldg. / Call Number: Thesis1993 .L375. Source: Masters Abstracts International, Volume: 32-02, page: 0725. Adviser: Robert Orr. Thesis (M.A.)--University of Windsor (Canada), 1993

Effects of stimulus movement and post-habituation delay on newborn infants\u27 ability to retain visual information.

The present study was designed to determine whether delayed recognition memory for visual stimuli was present at birth. It was hypothesized that: (1) newborns would demonstrate delayed recognition memory for both a rotating and stationary Maltese Cross (MC); (2) stimulus movement would influence retention; and (3) various patterns of habituation (c.f., Bornstein & Benasich, 1986) would be observed. Seventy-eight newborns were divided into five delay conditions (0 s, 30 s, 60 s, 90 s, 120 s). Half were habituated to a stationary MC and half to a rotating MC. Following habituation and the delay period, the habituated MC was re-presented for 3 trials. The MC was then modified (i.e., (i) direction of rotation was reversed; or (ii) from stationary to rotating) and presented for 3 trials. Measures of stimulus-directed looking and negative state were recorded. The results indicated that newborns in the 90 s and 120 s delay conditions displayed significant increases in looking during the first test trial, but not when looking was averaged across the three test trials. Stimulus movement did not influence retention. Newborns in all five delay conditions increased looking to the modified MC. Finally, the majority of newborns exhibited a fluctuating pattern of habituation, but the patterns did not influence retention. The findings indicate that newborns retain visual information for at least 120 s. However, retrieval appears to degrade after 60 s. Following the longer delay intervals, the first test trial appeared to prime the newborns\u27 long-term memory, permitting successful matching of the habituated MC on subsequent trials. Thus, it was concluded that delayed recognition memory for visual stimuli is present at birth. It was argued that the information processing model provides the best explanation for the obtained findings. Behavioural fatigue was ruled out since newborn looking increased to novelty. Furthermore, variable patterns of looking during the habituation phase (i.e., fluctuating) which were present in some newborns was used to argue against a selective receptor model of newborn habituation. The failure to obtain the expected stimulus movement effects was discussed in terms of procedural considerations.Dept. of Psychology. Paper copy at Leddy Library: Theses & Major Papers - Basement, West Bldg. / Call Number: Thesis1996 .L36. Source: Dissertation Abstracts International, Volume: 57-07, Section: B, page: 4747. Adviser: R. Robert Orr. Thesis (Ph.D.)--University of Windsor (Canada), 1996

Prenatal Maternal Stress Predicts Childhood Asthma in Girls: Project Ice Storm

Little is known about how prenatal maternal stress (PNMS) influences risks of asthma in humans. In this small study, we sought to determine whether disaster-related PNMS would predict asthma risk in children. In June 1998, we assessed severity of objective hardship and subjective distress in women pregnant during the January 1998 Quebec Ice Storm. Lifetime asthma symptoms, diagnoses, and corticosteroid utilization were assessed when the children were 12 years old (N = 68). No effects of objective hardship or timing of the exposure were found. However, we found that, in girls only, higher levels of prenatal maternal subjective distress predicted greater lifetime risk of wheezing (OR = 1.11; 90% CI = 1.01–1.23), doctor-diagnosed asthma (OR = 1.09; 90% CI = 1.00–1.19), and lifetime utilization of corticosteroids (OR = 1.12; 90% CI = 1.01–1.25). Other perinatal and current maternal life events were also associated with asthma outcomes. Findings suggest that stress during pregnancy opens a window for fetal programming of immune functioning. A sex-based approach may be useful to examine how prenatal and postnatal environments combine to program the immune system. This small study needs to be replicated with a larger, more representative sample

Antimicrobial Stewardship in Long-Term Care Facilities: A Call to Action

Antimicrobial resistance is a global public health crisis and a national security threat to the United States, as stated in an executive order signed by the president in September 2014. This crisis is a result of indiscriminant antimicrobial use, which promotes selection for resistant organisms, increases the risk of adverse drug events, and renders patients vulnerable to drug-resistant infections. Antimicrobial stewardship is a key measure to combat antimicrobial resistance and specifically seeks to do this by improving antimicrobial use. Antimicrobial stewardship compliments infection control practices and it is important to note that these 2 disciplines are distinct and cannot be discussed interchangeably. Antimicrobial stewardship promotes the appropriate diagnosis, drug, dose, and duration of treatment. The appropriate diagnosis falls into the hands of the prescriber and clinical staff. Optimal antimicrobial drug selection, dosing strategy, and duration of treatment, however, often require expertise in antimicrobial therapy, such as an infectious disease–trained physician or pharmacist. Therefore, successful antimicrobial stewardship programs must be comprehensive and interdisciplinary. Most antimicrobial stewardship programs focus on hospitals; yet, in long-term care, up to 75% of antimicrobial use is inappropriate or unnecessary. Thus, one of the most pressing areas in need for antimicrobial stewardship is in long-term care facilities. Unfortunately, there is little evidence that describes effective antimicrobial stewardship interventions in this setting. This review discusses the need for and barriers to antimicrobial stewardship in long-term care facilities. Additionally, this review describes prior interventions that have been implemented and tested to improve antimicrobial use in long-term care facilities

Prenatal stress and brain development.

Prenatal stress (PS) has been linked to abnormal cognitive, behavioral and psychosocial outcomes in both animals and humans. Animal studies have clearly demonstrated PS effects on the offspring's brain, however, while it has been speculated that PS most likely affects the brains of exposed human fetuses as well, no study has to date examined this possibility prospectively using an independent stressor (i.e., a stressful event that the pregnant woman has no control over, such as a natural disaster). The aim of this review is to summarize the existing animal literature by focusing on specific brain regions that have been shown to be affected by PS both macroscopically and microscopically. These regions include the hippocampus, amygdala, corpus callosum, anterior commissure, cerebral cortex, cerebellum and hypothalamus. We first discuss the mechanisms by which the effects of PS might occur. In particular, we show that maternal and fetal hypothalamicpituitary-adrenal (HPA) axes, and the placenta, are the most likely candidates for these mechanisms. We see that, although animal studies have obvious advantages over human studies, the integration of findings in animals and the transfer of these findings to human populations remains a complex issue. Finally, we show how it is possible to circumvent these challenges by studying the effects of PS on brain development directly in humans, by taking advantage of natural or man-made disasters and assessing the impact and consequences of such stressful events on pregnant women and their offspring prospectively

Prenatal Stress due to a Natural Disaster Predicts Adiposity in Childhood: The Iowa Flood Study

Prenatal stress can affect lifelong physical growth, including increased obesity risk. However, human studies remain limited. Natural disasters provide models of independent stressors unrelated to confounding maternal characteristics. We assessed degree of objective hardship and subjective distress in women pregnant during severe flooding. At ages 2.5 and 4 years we assessed body mass index (BMI), subscapular plus triceps skinfolds (SS + TR, an index of total adiposity), and SS: TR ratio (an index of central adiposity) in their children (n=106). Hierarchical regressions controlled first for several potential confounds. Controlling for these, flood exposure during early gestation predicted greater BMI increase from age 2.5 to 4, as well as total adiposity at 2.5. Greater maternal hardship and distress due to the floods, as well as other nonflood life events during pregnancy, independently predicted greater increase in total adiposity between 2.5 and 4 years. These results support the hypothesis that prenatal stress increases adiposity beginning in childhood and suggest that early gestation is a sensitive period. Results further highlight the additive effects of maternal objective and subjective stress, life events, and depression, emphasizing the importance of continued studies on multiple, detailed measures of maternal mental health and experience in pregnancy and child growth

Cranberry (Vaccinium macrocarpon) oligosaccharides decrease biofilm formation by uropathogenic Escherichia coli

The preventive effects of the American cranberry (Vaccinium macrocarpon) against urinary tract infections are supported by extensive studies which have primarily focused on its phenolic constituents. Herein, a phenolic-free carbohydrate fraction (designated cranf1b-F2) was purified from cranberry fruit using ion exchange and size exclusion chromatography. MALDI-TOF-MS analysis revealed that the cranf1b-F2 constituents are predominantly oligosaccharides possessing various degrees of polymerisation and further structural analysis (by GC–MS and NMR) revealed mainly xyloglucan and arabinan residues. In antimicrobial assays, cranf1b-F2 (at 1.25 mg/mL concentration) reduced biofilm production by the uropathogenic Escherichia coli CFT073 strain by over 50% but did not inhibit bacterial growth. Cranf1b-F2 (ranging from 0.625 to 10 mg/mL) also inhibited biofilm formation of the non-pathogenic E. coli MG1655 strain up to 60% in a concentration-dependent manner. These results suggest that cranberry oligosaccharides, in addition to its phenolic constituents, may play a role in its preventive effects against urinary tract infections

Le stress prénatal maternel d'une catastrophe naturelle réduit le niveau d'ARNm de GR-β placentaire

Le placenta humain régule le transfert du stress maternel au foetus, notamment via l’activité de l’enzyme 11β-hydroxystéroïde déshydrogénase de type 2 (11β-HSD2). La 11β-HSD2 convertit le cortisol maternel en cortisone, protégeant le foetus d’un excès de cortisol. Le stress maternel prénatal (PNMS) est associé à une diminution de l’activité de la 11β-HSD2 placentaire et avec une augmentation du cortisol foetal ce qui peut affecter le développement du foetus. La 11β- HSD2 placentaire joue un rôle direct dans la modulation des effets de l’exposition prénatale aux glucocorticoïdes endogènes, mais aussi un action indirect via l’activation des récepteurs aux glucorticoïdes (GR) ainsi que le transporteur placentaire de glucose de type 1 (GLUT-1). En outre, le PNMS a été associé à une diminution de l’expression de GLUT-1 et du transfert de glucose au foetus. L’objectif est de déterminer si les effets d’une exposition au PNMS (ex: une inondation) sont associés à une altération de l’expression et/ou de l’activité de la 11β-HSD2, de l’expression de GR, GLUT-1 au niveau du placenta. Le niveau d’ARNm a été évalué par RTqPCR sur les placentas issus d’une cohorte de femmes enceinte lors d’une inondation. Les résultats démontrent que le stress subjectif causé par une inondation réduit l’expression du GR-β, mais pas la 11β-HSD2. Cette étude est la première à mettre en lien le PNMS et le niveau de GR- β, ce qui implique une augmentation de réponse au cortisol en ne modifiant pas l’expression de la 11β-HSD2.</p

The effects of prenatal stress on early temperament: the 2011 Queensland flood study

This study examined the effects of disaster-related prenatal maternal stress on infant temperament and whether the sex of the infant or the timing of the stressor in pregnancy would moderate the effects.Mothers' objective experiences of a sudden-onset flood in Queensland, Australia, their subjective emotional reactions, and cognitive appraisal of the event were assessed. At 6 months postpartum, 121 mothers reported their infant's temperament on the 5 dimensions of the Short Temperament Scale for Infants.When controlling for postnatal maternal factors, subjective prenatal maternal stress and cognitive appraisal of the disaster were associated with easier aspects of infant temperament. However, several interesting interactions emerged showing negative effects of the flood. With higher levels of objective hardship in pregnancy, boys (but not girls) received more irritable temperament ratings. When the flood occurred early in pregnancy, higher levels of objective hardship predicted more arrhythmic infant temperament. Finally, mothers whose emotional response to the flood exceeded the hardship they endured reported significantly more active-reactive infants.Prenatal maternal stress from a natural disaster predicted more difficult temperament ratings that were moderated by infant sex, timing of the flood in gestation, and mother's emotional response to the disaster

Students as co-producers in a multidisciplinary software engineering project: addressing cultural distance and cross-cohort handover

This article reports on an undergraduate software engineering project in which, over a period of two years, four student teams from different cohorts developed a note-taking app for four academic clients at the students’ own university. We investigated how projects involving internal clients can give students the benefits of engaging in real software development while also giving them experience of a student-staff collaboration that has its own benefits for students, academics, and the university more broadly. As the university involved is a Sino-Foreign university located in China, where most students are Chinese and most teaching staff are not, this ‘student as co-producer’ approach interacts with another feature of the project: cultural distance. Based on analysis of notes, reports, interviews, and focus groups, we recommend that students should be provided with communicative strategies for dealing with academics as clients; universities should develop policies on ownership of student-staff collaborations; and projects should include a formalised handover process. This article can serve as guidance for educators considering a ‘students as co-producers’ approach for software development projects