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PubMed2005

The relationship between different levels of cognition and behavioural symptoms in the eating disorders.

BACKGROUND: Both disorder-specific cognitions and unconditional core beliefs have been associated with eating-disordered behaviours. This study examines whether these beliefs might provide competing or complementary explanations of those behaviours. METHOD: The participants were 151 women with eating disorders. Each woman completed two self-report measures-the Eating Disorder Examination Questionnaire (measuring disorder-specific cognitions and reported behavioural frequency) and the Young Schema Questionnaire-Short version (measuring unconditional core beliefs). Objective height and weight were measured to give body mass index (BMI). Regression analyses were used to compare additive, mediator and moderator models of the cognition-behaviour link. RESULTS: BMI and reported frequency of vomiting were best explained by models where the impact of disorder-specific cognitions was moderated by unhealthy core beliefs, but where neither form of belief had an independent effect. In contrast, the frequency of reported objective binge-eating was best explained by an additive effect of the two forms of cognition. DISCUSSION: The findings indicate that both disorder-specific cognitions and unconditional core beliefs are necessary to explain the development and maintenance of disordered eating behaviours. This conclusion suggests that cognitive-behavioural approaches might be more effective if they address both levels of cognition. However, prospective research is required to confirm the causal hypothesis based on the present cross-sectional data.

Adult↗
PubMed2006

Telephone follow-up of self-care behaviour after a single session education of patients with heart failure in primary health care.

BACKGROUND: Improved self-care behaviour is a goal in educational programmes for patients with heart failure, especially in regard to daily self-weighing and salt and fluid restriction. AIMS: The objectives of the present study were to: (1) describe self-care with special regard to daily self-weighing and salt and fluid restriction in patients with heart failure in primary health care, during one year of monthly telephone follow-up after a single session education, (2) to describe gender differences in regard to self-care and (3) to investigate if self-care was associated with health-related quality of life. METHODS: The present analysis is a subgroup analysis of a larger randomised trial. After one intensive educational session, a primary health care nurse evaluated 60 patients (mean age 79 years, 52% males, 60% in New York Heart Association class III-IV) by monthly telephone follow-up during 12 months. RESULTS: The intervention had no effect on quality of life measured by EuroQol 5D and no significant associations were found between quality of life and self-care behaviour. Self-care behaviour measured by The European Self-care Behaviour Scale remained unchanged throughout the study period. No significant gender differences were shown but women had a tendency to improve adherence to daily weight control between 3- and 12 months. CONCLUSION: The self-care behaviour and quality of life in patients with heart failure did not change during one year of monthly telephone follow-up after a single session education and this indicates a need for more extensive interventions to obtain improved self-care behaviour in these patients.

Aftercare↗
PubMed2005

Dexmedetomidine selectively suppresses dominant behaviour in aggressive and sociable mice.

Dexmedetomidine is a highly specific alpha2-adrenoreceptor agonist, which is now clinically used to induce sedation in patients in the intensive care units. Behavioural effects of dexmedetomidine have been little studied so far. The drug was reported to reduce behaviour such as locomotion or measures of anxiety or aggression in animals. The aim of the present study was to ascertain whether dexmedetomidine inhibits behaviour uniformly or with respect to particular stimuli or situations. Therefore, behavioural effects of dexmedetomidine were studied in the social conflict test in male mice (after three weeks of individual housing), which provides a wide spectrum of behavioural activities in two types of animals (aggressive and sociable mice) as well as in the activity cage. Dexmedetomidine (5-40 microg/kg i.p.) decreased locomotion in the activity cage and this effect was fully antagonized by atipamezole, a selective alpha2-adrenereceptor antagonist. However, dexmedetomidine did not reduce locomotion during social conflict. The only significant effects during social conflict were a selective and dose-dependent antiaggressive effect in aggressive mice and a selective reduction of social investigation ('sociability') in sociable mice. Thus, dexmedetomidine appears to inhibit predominantly dominant behaviour evoked by biologically important stimuli. The ability of dexmedetomidine to reduce aggression might be utilized for treatment of aggressive states. Sedation caused by dexmedetomidine can be easily disrupted and thus the drug may have an advantage over benzodiazepines or neuroleptics, which are used in this indication.

Adrenergic alpha-Agonists↗
PubMed2006

The relationship between measures of executive function, motor performance and externalising behaviour in 5- and 6-year-old children.

In his cognitive-energetic model of information processing Sergeant [Sergeant, J. (2000). The cognitive-energetic model: An empirical approach to ADHD. Neuroscience and Biobehavioral Reviews, 24, 7-12] links executive function (EF) to motor behaviour. This link has been supported by evidence from a number of sources including studies of attention deficit hyperactivity disorder (ADHD) and developmental coordination disorder (DCD). Little is known developmentally about this association. Given the rapid change in both motor proficiency and EF that takes place in the pre-school years, this appears an important time to look for the emergence of the link between these factors. In this study we tested 5- and 6-year-old children on motor tasks from the movement assessment battery for children and on measures of response inhibition (Stroop and stop-signal task) and examined the relationship between scores on these measures. Additionally, in order to relate this behaviour to everyday function, the Rowe behavioural rating inventory (RBRI), a teachers' behavioural rating of externalising behaviour, was also gathered and this related to EF and motor performance. It was found that motor performance correlated significantly with RBRI scores (better motor performance with lower externalising behaviour) and with Stroop performance. The relationship between motor performance and stop-signal task performance was in the expected direction but failed to reach significance and there was no clear association between performance on the stop-signal task and either Stroop or RBRI scores. The results are discussed in relation to different aspects of response inhibition (inhibition of a pre-potent response, interference control) and how these might relate to motor control.

Attention Deficit Disorder with Hyperactivity↗
PubMed2026

Exploring the perceptions, experiences, and behaviours that nurses and midwives face in relation to sleep: A systematic review of qualitative evidence.

BACKGROUND: The importance of sleep for nurses and midwives is increasingly being recognised. Poor sleep is known to have negative impacts on physical health, mental wellbeing, and work performance. This has prompted efforts to promote and support staff sleep. However, further efforts are needed to understand how nurses and midwives consider and manage sleep to ensure that meaningful and effective interventions are adopted and sustained. AIMS: This review of qualitative evidence aims to examine nurses' and midwives' perceptions, experiences, and behaviours around sleep. METHODS: This review followed JBI's systematic meta-aggregative approach including development of an a priori protocol. A systematic search of six electronic databases (MEDLINE, Embase, Emcare, PsycINFO, CINAHL, and Scopus) was undertaken to identify qualitative studies that examine nurses' and midwives' perceptions, experiences, and behaviours related to sleep. The search was conducted on the 10th of October 2024. Study selection, quality appraisal, data extraction, and synthesis followed JBI approaches and the ConQual approach was used to report assessment of synthesised findings. RESULTS: Thirty-three studies were included for review, and 245 findings were aggregated into 24 categories and nine synthesised findings related to the perceptions, behaviours, and experiences. While sleep was perceived as important, poor sleep was often understood as an expected and inevitable part of the job and that there was a need to always be awake to provide continual care. Experiences influencing sleep related to personal circumstances and work-related factors, as well as professional training and institutional practices. A range of behaviours, including planning time to sleep, using sleep aids, modifying the sleep environment, and altering daytime behaviours were also described. CONCLUSION: This review identified a range of perceptions, behaviours, and experiences that may influence the sleep of nurses and midwives which are vital to supporting individual and workforce wellbeing and safe, effective clinical practice. Insights from this review can be used to better understand nurses' and midwives' relationship with sleep and to develop and enhance targeted sleep interventions and programs that aim to promote and support healthy sleep among nurses and midwives. Open Science Framework Registration: 10.17605/OSF.IO/F32UM.

Humans↗
PubMed2005

Lifetime risk of suicide ideation and attempts in an Australian community: prevalence, suicidal process, and help-seeking behaviour.

BACKGROUND: The World Health Organisation SUicide PREvention-Multisite Intervention Study on Suicide (WHO/SUPRE-MISS) investigates suicidal behaviours in a number of nations. The feasibility of the different branches of the study was piloted in Queensland, Australia. This paper reports on the community survey component. METHOD: Randomised telephone interviews (n=11,572) were conducted to determine the lifetime prevalence of suicidal ideation and attempts, and corresponding socio-demographic and cultural characteristics. A subsequent postal survey sent to consenting individuals reporting lifetime suicide ideation/attempt (n=1311) was meant to ascertain the possible development of that behaviour along a continuum, psychiatric and psychological factors, suicidal transmission, help-seeking, and service utilisation. RESULTS: Suicide ideation and attempts prevailed in individuals aged 25-44 years, and declined with increasing age. In most cases, suicidal experience/s did not develop over time with progressively increasing severity. Knowledge of someone else's suicidal behaviour significantly increased the risk of similar acts. Almost half of the subjects contended with their suicidal crisis by over-drinking alcohol, and 1/3 through other forms of reckless behaviour. The ratio completed/attempted suicide was 1 to 23. Less than 30% of subjects went to the hospital after their suicidal behaviour, and treatment received and staff attitudes were rated less favourably than that of General Practitioners. CONCLUSIONS: This survey provides a reliable picture of suicide ideation and behaviour in the general population. Information on the development of suicidal process, recklessness, and help-seeking attitudes may be valuable for future prevention strategies.

Adolescent↗
PubMed2004

Reduced anxiety-related behaviour in transgenic mice overexpressing serotonin 1A receptors.

Serotonergic neurons play a major role in the modulation of emotion and behaviour. Especially knockout studies have revealed a role for the serotonin(1A) (5-HT(1A)) receptor in anxiety related behaviour. Mutant animals exhibit enhanced anxiety-like responses, possibly resulting from impaired autoinhibitory control of midbrain serotonergic neurons. To further elucidate the role of the 5-HT(1A) receptors in affective behaviour, a complementary approach has been used and transgenic mice overexpressing this receptor subtype have been generated. The expression of the active 5-HT(1A) receptor protein as indicated by autoradiography was transiently increased during early postnatal development (P1.5) as compared to wild-type mice. Within the next 2 weeks, the increase in receptor binding vanished and was also not apparent in adult animals indicating adaptive changes in the regulation of 5-HT(1A) receptor expression. Although no evidence for increased receptor binding in the brains of adult homozygous mice was found by autoradiography, typical phenotypic changes indicative of 5-HT(1A) receptor overactivity were apparent. Transgenic mice revealed a reduced molar ratio of 5-hydroxyindoleacetic acid to serotonin in several brain areas and elevated serotonin values in the hippocampus and striatum. Moreover, anxiety-like behaviour was decreased in male and female transgenic mice and body temperature was lowered in male transgenic mice in comparison with heterozygous and wild-type mice. These findings further underline the pivotal role of 5-HT(1A) receptors in the homeostasis of anxiety-like behaviour and the crucial importance of stimulation of the 5-HT(1A) receptor during the early postnatal development for normal anxiety-like behaviour throughout life.

Animals↗
PubMed2006

Behavioural anomalies in mice evoked by "Tokyo" disruption of the Vitamin D receptor gene.

Vitamin D is a steroid hormone with many important functions in the brain, mediated through the nuclear Vitamin D receptor (VDR). Mounting clinical data link VDR mutations to various psychiatric phenotypes. We have reported previously that mutant mice lacking functional VDR ("Tokyo" VDR mutant mice) display several behavioural anomalies, including high anxiety and aberrant grooming. Given the important role of Vitamin D and VDR in brain development and functioning, we hypothesized that several other important behavioural domains may be affected by disruption of the VDR gene in mice. Here we report that VDR mutants display unaffected depressive-like behaviour, but show abnormal social behaviours, reduced social barbering and aggressiveness, impaired nest building and aberrant maternal (pup neglect, cannibalism) behaviours. Taken together, these findings confirm the important role postulated for the VDR in the regulation of behaviour, and suggest the mice lacking functional VDR may be a useful tool to model different brain disorders.

Aggression↗
PubMed2006

The development of a scale to discover outpatients' perceptions of the relative desirability of different elements of doctors' communication behaviours.

OBJECTIVE: The objective of the study was to discover which aspects of doctor communication behaviours are more or less desirable to patients who are attending medical outpatients clinics. METHODS: Two hundred and twenty patients took part in the study, which was undertaken in four phases. In phase one, patients completed a 10-item questionnaire where they indicated, by means of a five-point scale, their preferences for doctor communication behaviours. In phases two and three patients qualitatively expressed the meaning that they ascribed to terminology that is used by some researchers to define doctor communication behaviours. In the final phase of the study a 12-item questionnaire was developed by integrating the phase one questionnaire and patients' report from phases two and three. Patients indicated, by means of a five-point scale, their preferences for different communication behaviours that might be used by doctors. Patient's preferences were ranked in terms of the most to the least preferred behaviours. RESULTS: The findings suggest that patients most prefer consultations where doctors give information spontaneously and display affective behaviours. They least preferred consultations where medical matters are discussed and where information is not forthcoming. Furthermore, the finding suggests that the use of blanket terms by researches in defining doctor communication can lead to differences in interpretation by patients. CONCLUSIONS: The methods developed in the study appear to provide a useful tool to discover patients' desires in terms of doctor communication. PRACTICE IMPLICATIONS: The rank scale developed in the study could prove useful to medical practice. It could, for example, provide a straightforward method whereby doctors could readily access researcher's recommendations about communication. Furthermore, the scale could be used in various healthcare settings in order to discover if different patient groups vary in terms of the doctor communication they desire.

Adolescent↗
PubMed2004

Differential effects of the selective orexin-1 receptor antagonist SB-334867 and lithium chloride on the behavioural satiety sequence in rats.

Recent studies have shown that acute systemic administration of the selective orexin-1 receptor antagonist SB-334867 significantly reduces food intake in rats. Although this anorectic action of orexin-1 receptor blockade is associated with an acceleration in the transition from eating to resting, it is widely recognised that the behavioural indices of satiety are not dissimilar to those of illness. In this context, Experiment 1 confirmed a significant anorectic effect of 90 (but not 60) mg/kg lithium chloride (LiCl) in male rats presented with palatable mash in the home-cage environment. Experiment 2 employed a continuous monitoring technique to contrast the effects of LiCl (90 mg/kg) and SB-334867 (10 and 30 mg/kg) on food intake and behaviour during a 1-h test with palatable mash. SB-334867 dose-dependently inhibited food intake, with the higher dose producing a comparable degree of appetite suppression (approximately 40%) to that seen with LiCl. Despite equivalent anorectic action, the two compounds produced very different effects on behaviour. LiCl reduced active behaviours (locomotion, rearing, grooming and sniffing), slowed the rate of eating and disrupted the behavioural satiety sequence (BSS). In contrast, SB-334867 (30 mg/kg) decreased the duration of feeding and grooming, and modestly accelerated the transition between eating and resting. Furthermore, whereas LiCl failed to alter posttreatment bodyweight gain, SB-334867 (30 mg/kg) produced a significant weight loss in the 24-h period immediately following injection. Overall, the divergent profiles obtained with equianorectic doses of LiCl and SB-334867 provide convincing evidence for the behavioural selectivity of SB-334867-induced anorexia.

Animals↗
PubMed2006

Relationship between DHA status at birth and child problem behaviour at 7 years of age.

Animal studies have demonstrated behavioural effects of long-chain polyunsaturated fatty acid (LC-PUFA) deficiencies and in humans, several psychiatric disorders have been linked to abnormal essential fatty acid metabolism. The aim of this study was to examine the relationship between LC-PUFA status at birth and the later development of problem behaviour. In a sample of 393 children, higher levels of docosahexaenoic acid (DHA) at birth were associated with lower levels of internalising problem behaviour at age 7 years. The association was markedly present in the infants fed with artificial formula (n=215, Beta=-0.32, P=0.000), but absent in the infants fed with human milk (n=170, Beta=0.11, P=0.325). The associations between arachidonic acid and internalising or externalising behaviour were neither large nor significant. The results suggest that perinatal DHA status may have long-term behavioural consequences. Therefore, we suggest to include measures of problem behaviour in future trials of LC-PUFA supplementation of mothers and/or infants.

Breast Feeding↗
PubMed2006

Serotonin 1A and 2A receptor densities, neurochemical and behavioural characteristics in two closely related mice strains after long-term isolation.

Knowledge about individual differences in behavioural traits and their neurostructural and neurochemical correlates should improve therapeutic approaches of corresponding psychopathology. The presented investigations are aimed to reveal interrelationships between central nervous serotonergic [5-HT] receptor densities and neurochemical as well as behavioural traits in two mice strains. Male AB-Halle [ABH] and AB-Gatersleben [ABG] mice differing in aggression were investigated after 6 weeks of isolation housing. 5-HT1A and 5-HT2A receptors were analysed in different brain regions by in vitro autoradiography. HPLC determinations of aminergic transmission in the cortex, hippocampus, striatum as well as in the raphe-region and radioimmunoassay determination of serum corticosterone were done before (basal condition) and after behavioural tests (challenge condition). Receptor autoradiography revealed higher 5-HT1A receptor densities, especially in limbic regions, and lower 5-HT2A receptor densities in the basal ganglia of ABH mice. Furthermore, ABH mice characterized as behaviourally more active in the open field and plus maze as well as more reactive and aggressive during the social interaction test showed lower basal 5-hydroxyindolacetic acid [5-HIAA] concentrations in the hippocampus, cortex and raphe-region as well as a different activation pattern in serotonergic, dopaminergic and noradrenergic brain systems after challenge in comparison to ABG mice. Additionally lower corticosterone concentrations were found in ABH mice. Lower basal serotonergic and striatal dopaminergic, but higher basal cortical dopaminergic metabolism in contrast to enhanced challenge-induced central nervous serotonergic and cortical dopaminergic reactivities are discussed to be crucial for an enhanced reactive behavioural trait, which could secondarily result in aggression-related behaviours, where higher 5-HT1A receptor and lower 5-HT2A receptor densities may be essential.

Analysis of Variance↗
PubMed2005

A total population study of challenging behaviour in the county of Hedmark, Norway: prevalence, and risk markers.

Studies in Britain and the US indicate that 10-15% of people with mental retardation show challenging behaviour, like attacking others (aggression), self-injurious behaviour, destruction, and other difficult, disruptive or socially unacceptable acts. Most researchers indicate that challenging behaviour is more common among adolescents and young adults, among males, is associated with autism, and increases with lack of communication skills and severity of mental retardation. These factors can be understood as risk markers, and some of them can be decreased by preventive and treatment interventions, at least in principle. The present study confirmed most of the previous findings, with some exceptions: the prevalence of more demanding challenging behaviour was somewhat lower in the present study, and no association between gender and challenging behaviour was found. We also concluded that declining prevalence of challenging behaviour at older ages is not a result of a young age structure of the population.

Adolescent↗
PubMed2005

Breed, litter and parity effects on placental weight and placentome number, and consequences for the neonatal behaviour of the lamb.

Lamb survival is impaired in low birth weight lambs, and those that are slow to stand and suck. Many of the factors that influence lamb vigour, such as parity, litter size, and breed, may exert their effects, at least partially, before birth by influencing placenta development. Our hypothesis was that retarded lamb behavioural development was due to differences in placentation in these animals. Data were collected from Blackface and Suffolk lambs in the first 2 h after birth and placentas were collected when delivered. Suffolk lambs, which were behaviourally slower and had lower rectal temperatures than Blackface lambs, were associated with larger but less efficient placentas (placental efficiency defined as foetal weight supported per g placenta) with fewer foetal cotyledons than Blackface placentas. Triplet lambs were significantly slower than twin or single lambs to suck and had lower rectal temperatures. Although placenta efficiency increased with litter size, placenta and cotyledon weight, and cotyledon number increased with twinning but not thereafter. It seemed likely that triplet lambs suffered some placental insufficiency in comparison to other litter sizes. Lambs born to first parity mothers were slower to stand and reach the udder than lambs of more experienced ewes, and first parity ewes also had smaller and less efficient placentas although cotyledon number was not affected. Male lambs tended to be slower than female lambs for most behaviours, although rectal temperatures were not affected. The sire of the lamb also influenced lamb behaviour and rectal temperature. Both lamb sex and lamb sire influenced the average weight of placental cotyledons, thus some of the sire effect on the behaviour and birth weight of his progeny might be mediated through placental development. Lamb neonatal vigour was correlated with placental efficiency suggesting that lamb behaviour immediately after birth is related to placental development and function.

Animals↗
PubMed2004

Candidate genes for behavioural ecology.

In spite of millions of years of evolutionary divergence, the conservation of gene function is common across distant lineages. As such, genes that are known to influence behaviour in one organism are likely to influence similar behaviours in other organisms. Recent studies of the evolution of behaviour and morphological adaptation support this notion. Thus, the candidate gene approach offers great potential to expand our understanding of behavioural ecology. Changes in the expression of candidate genes can reveal their contribution to behavioural variation and/or phenotypic plasticity. Knowledge of gene function also enables experimental manipulation of behaviour in the lab and in the field. The candidate gene approach provides an accessible and useful tool for generating insights about animals that are not typically associated with genetic experimentation.

Journal Article↗
PubMed2001

Variations of the level of vigilance and of behavioural activities during simulated automobile driving.

During a monotonous activity, certain behaviours occur that are not necessary to the performance of the task. These are subsidiary or collateral activities. Our purpose was to find out if the number of these behaviours tends to increase during a monotonous and prolonged activity. A study was carried out with 17 subjects performing a 2-h car drive on the Vigilance Analysis Driving Simulator. An analysis of the drivers' behaviour and of their state of vigilance allowed us to confirm the existence of a relation between the occurrence of these behaviours and the variations of the level of arousal. In addition, we determined for all produced behaviours, those that preceded, those that coincided with, and those that followed low vigilance phenomena. These results were interpreted in terms of behavioural signs, precursory of low vigilance, indicative of low vigilance, or reactivating the driver.

Adult↗
PubMed1998

Drivers' speed behaviour at a zebra crossing: a case study.

The purpose of the study was to: (1) observe the frequency of giving way to pedestrians at the zebra crossing; (2) reveal speed adaptation problems; (3) examine if the time difference between the arrival of the pedestrian and the car have any influence on the speed of the approaching car; (4) identify so-called 'ideal' situations (in which the car brakes on the driver's own initiative in order to give way to a pedestrian) upon which recommendations can be given for implementing means to improve speed behaviour at zebra crossings. It was hypothesized that the speed behaviour of drivers approaching the zebra crossing depends on the pedestrian's arrival at the curb related to the car's expected arrival at the zebra crossing. The speed was measured on randomly selected 'free' passenger cars which approached a non-signalized mid-block zebra crossing on a two-lane arterial road. Every second a radar gun, hidden at the road side, sent the speed data to a lap-top computer in which the observer could also register pedestrians' arrival at, and start from the curb. Simultaneous video recordings were made in order to obtain a more detailed description of the interaction between the car and the pedestrian. Speed behaviour in encounters (148 observations), non-encounters with pedestrian presence (642 observations) and situations without pedestrian presence (690 observations) was compared. Situations with pedestrian priority were classified. The results show that the frequency of giving way is 5%. Drivers do not observe the law concerning speed behaviour at the zebra crossing, as they do not "adapt the speed in such way that they do not endanger pedestrians who are already on, or are about to step onto the zebra crossing". In encounters, three out of four drivers maintain the same speed or accelerate and only one out of four slows down or brakes. These results indicate that maintained high speed (even exceeding the speed limit of 50 km hour-1) is the signal from the drivers that they do not intend to give way to the pedestrian at the zebra crossing. The conclusion is that encounters between cars and pedestrians at the zebra crossing are critical situations in which the driver has to be influenced before he reaches the decision zone at 50 to 40 m before the zebra crossing in order to prevent the 'signalling by speed' behaviour. Countermeasures to improve driver behaviour at the zebra crossing are discussed.

Acceleration↗
PubMed1980

Sexual behaviour and reproductive competition in male wild and domestic Norway rats.

The copulatory behaviour of male wild Norway rats (Rattus norvegicus) exposed individually to females in hormone-induced oestrus is characterized by fewer mounts and intromissions per ejaculatory series, shorter ejaculation latencies, and longer ejaculatory clasps than the copulatory behaviour of domestic males. Competition between wild and domestic males testes simultaneously in pairs produced only minor changes in copulatory behaviour. The reproductive success of wild and domestic male pair simultaneously exposed to naturally cycling females was nearly equal in both the laboratory and an outdoor enclosure. Genotype of the female had little effect on male copulatory behaviour. The copulatory behaviour of sexually naive and experienced domestic rats did not differ. However, most sexually naive wild males failed to exhibit copulatory behaviour under the test conditions employed.

Animals↗