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Behavioural Impairments (behavioural + impairment)
Selected Abstracts2,6-Dichlorophenyl Methylsulphone Induced Behavioural Impairments in Rats and Mice in Relation to Olfactory Mucosal MetaplasiaBASIC AND CLINICAL PHARMACOLOGY & TOXICOLOGY, Issue 4 2003Carina Carlsson Furthermore, 2,6-diClPh-MeSO2 gives rise to a long-lasting hyperactivity along with an impaired radial arm maze performance. To study cause-effect relationships, olfactory mucosal histopathology, glial fibrillary acidic protein induction and neurobehavioural deficits were re-examined in mice and rats of both sexes given a single intraperitoneal dose of 2,6-diClPh-MeSO2 (16 and 65 mg/kg). There was a clear difference in the character of the olfactory mucosal lesions in the two species. In mice, an extensive metaplasia characterised by severe fibrosis, cartilage and bone formation accompanied with large polyps filling the nasal lumen was confirmed. In rats, a dose-dependent weak metaplasia with patchy loss of olfactory epithelium was observed three weeks after dosing, preferentially at the dorsal meatus, nasal septum, and the tips of the middle ethmoturbinates. Large areas of intact olfactory epithelium remained in all animals, particularly in the low dose rats. In both species, 2,6-diClPh-MeSO2 gave rise to significantly increased motor-activities, impaired performance in the radial arm maze, and glial fibrillary acidic protein-induction. Only rats showed hyperactivity at the low dose. Performance in the Morris water maze was unaffected in rats of both sexes indicating that a general impairment in spatial learning could not be supported. We propose that the observed hyperactivity and radial arm maze acquisition deficits originated from a direct effect of 2,6-diClPh-MeSO2 in the brain rather than being a consequence of the olfactory mucosal lesion. [source] Induction of bilateral plasticity in sensory cortical maps by small unilateral cortical infarcts in ratsEUROPEAN JOURNAL OF NEUROSCIENCE, Issue 3 2003S. Reinecke Abstract Behavioural impairments caused by brain lesions show a considerable, though often incomplete, recovery. It is hypothesized that cortical and subcortical plasticity of sensory representations contribute to this recovery. In the hindpaw representation of somatosensory cortex of adult rats we investigated the effects of focal unilateral cortical lesions on remote areas. Cortical lesions with a diameter of ,,2 mm were induced in the parietal cortex by photothrombosis with the photosensitive dye Rose Bengal. Subsequently, animals were kept in standard cages for 7 days. On day seven, animals were anaesthetized and cutaneous receptive fields in the cortical hindpaw representations ipsi- and contralateral to the lesion were constructed from extracellular recordings of neurons in layer IV using glass microelectrodes. Receptive fields in the lesioned animals were compared to receptive fields measured in nonlesioned animals serving as controls. Quantitative analysis of receptive fields revealed a significant increase in size in the lesioned animals. This doubling in receptive field size was observed equally in the hemispheres ipsi- and contralateral to the lesion. The results indicate that the functional consequences of restricted cortical lesions are not limited to the area surrounding the lesion, but affect the cortical maps on the contralateral, nonlesioned hemisphere. [source] PPAR-gamma-mediated neuroprotection in a chronic mouse model of Parkinson's diseaseEUROPEAN JOURNAL OF NEUROSCIENCE, Issue 5 2009Nicoletta Schintu Abstract Rosiglitazone is a commonly prescribed insulin-sensitizing drug with a selective agonistic activity on the peroxisome proliferator-activated receptor-gamma (PPAR-,). PPAR-, can modulate inflammatory responses in the brain, and agonists might be beneficial in neurodegenerative diseases. In the present study we used a chronic 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine plus probenecid (MPTPp) mouse model of progressive Parkinson's disease (PD) to assess the therapeutic efficacy of rosiglitazone on behavioural impairment, neurodegeneration and inflammation. Mice chronically treated with MPTPp displayed typical features of PD, including impairment of motor and olfactory functions associated with partial loss of tyrosine hydroxylase (TH)-positive neurons in the substantia nigra pars compacta (SNc), decrease of dopamine (DA) and 3,4-dihydroxyphenylacetic acid (DOPAC) content and dynorphin (Dyn) mRNA levels in the caudate-putamen (CPu), intense microglial and astroglial response in the SNc and CPu. Chronic rosiglitazone, administered in association with MPTPp, completely prevented motor and olfactory dysfunctions and loss of TH-positive cells in the SNc. In the CPu, loss of striatal DA was partially prevented, whereas decreases in DOPAC content and Dyn were fully counteracted. Moreover, rosiglitazone completely inhibited microglia reactivity in SNc and CPu, as measured by CD11b immunostaining, and partially inhibited astroglial response assessed by glial fibrillary acidic protein immunoreactivity. Measurement of striatal MPP+ levels 2, 4, 6 h and 3 days after chronic treatment indicated that MPTP metabolism was not altered by rosiglitazone. The results support the use of PPAR-, agonists as a putative anti-inflammatory therapy aimed at arresting PD progression, and suggest that assessment in PD clinical trials is warranted. [source] Psychiatric inpatient care for adults with intellectual disabilities: generic or specialist units?JOURNAL OF INTELLECTUAL DISABILITY RESEARCH, Issue 1 2004K. Xenitidis Abstract Background When adults with intellectual disabilities (ID) require a psychiatric admission, general adult mental health units are often used. Specialist units have emerged recently as a care option but there is only limited evidence of their effectiveness. Thus this study aims to describe and evaluate the effectiveness of a specialist inpatient unit and report on the utilization of generic and specialist inpatient services. Method All patients admitted to a specialist ID psychiatric unit were evaluated on admission and immediately after discharge on a number of outcome measures. In addition, they were compared with those admitted to general adult mental health units covering the same catchment area. Results Significant improvements were demonstrated within the specialist unit cohort on measures including psychopathology, global level of functioning, behavioural impairment and severity of mental illness. The specialist unit patients had a longer length of inpatient stay but were less likely to be discharged to out-of-area residential placement. Conclusions Specialist units are an effective care option for this group of people. [source] Enhancing catch-and-release science with biotelemetryFISH AND FISHERIES, Issue 1 2008Michael R. Donaldson Abstract Catch-and-release (C&R) angling is widely practised by anglers and is a common fisheries management strategy or is a by-product of harvest regulations. Accordingly, there is a growing body of research that examines not only the mortality associated with C&R, but also the sublethal physiological and behavioural consequences. Biotelemetry offers a powerful means of remotely monitoring the behaviour, physiology and mortality of fish caught and released in their natural environment, but we contend that its usefulness is still underappreciated by scholars and managers. In this study, we review the applications of biotelemetry in C&R science, identify novel research directions, opportunities and challenges. There are now about 250 C&R studies but only one quarter of these utilize biotelemetry. In fact, almost all of the C&R studies that have used biotelemetry have been conducted within the last decade. We found that the majority of C&R telemetry studies used either radio or acoustic telemetry, while comparatively few studies have used satellite technologies. Most C&R biotelemetry studies have been used to assess mortality rates, behavioural impairments or to evaluate the effects of displacement on fish. A small fraction of studies (<8%) have used physiological sensors despite the fact that these tools are highly applicable to understanding the multiple sublethal consequences of C&R and are useful for providing mechanistic insights into endpoints such as death. We conclude that C&R science has the potential to benefit greatly from biotelemetry technology, particularly with respect to providing more robust short-term and delayed mortality estimates and adopting a more integrative and comparative approach to understanding the lethal and sublethal impacts of C&R. However, there are still a number of challenges including (i) the need for appropriate controls and methodological approaches, (ii) the need for accounting for tagging and handling stress and mortality, and (iii) the need for certainty in assessing mortality. However, the benefits associated with C&R biotelemetry outweigh its disadvantages and limitations and thereby offer C&R researchers a suite of new tools to enhance fisheries management and conservation. [source] The orally combined neuroprotective effects of sodium ferulate and borneol against transient global ischaemia in C57 BL/6J miceJOURNAL OF PHARMACY AND PHARMACOLOGY: AN INTERNATI ONAL JOURNAL OF PHARMACEUTICAL SCIENCE, Issue 7 2010Xiao-hong Chen Abstract Objectives, This study aimed to investigate the possible modification of the neuroprotective effect of sodium ferulate, when orally co-administered with borneol, in transient global cerebral ischaemia-induced functional, histological and cellular alterations in mice. Methods, The bilateral common carotid artery occlusion was conducted in C57 BL/6J mice for 25 min. The mice were then subjected to a water maze test over an extended recovery period, followed by an assessment of neuronal loss in the CA1 region of the hippocampus (haematoxylin and eosin staining). The blood,brain barrier permeability (Evans blue tracing), brain oedema and oxidative stress were assayed and histological sections were also immunostained for gliofibrillar acid protein (GFAP) expression. Key findings, The ischaemia reperfused mice were associated with long-lasting spatial learning deficits in the absence of other behavioural impairments and with neurodegeneration in the hippocampal CA1 region. However, the histological injuries were significantly attenuated by oral co-administration of sodium ferulate and borneol. Furthermore, combined treatment with sodium ferulate and borneol resulted in a significant reduction in brain oedema, GFAP-positive cells, malonaldialdehyde levels and blood,brain barrier permeability, but an increase in superoxide dismutase activity. Conclusions, Borneol may have benefits for the neuroprotective effect of sodium ferulate against injury induced in the brain by ischaemia/reperfusion. [source] Children's participation in home, school and community life after acquired brain injuryAUSTRALIAN OCCUPATIONAL THERAPY JOURNAL, Issue 2 2010Jane Galvin Aims:,This study aimed to describe participation at home, school and in the community of Australian children who had sustained an acquired brain injury (ABI). Parent ratings regarding the impact of cognitive, motor and behavioural impairments on participation were obtained. In addition, the influence of environmental factors on participation was investigated. Methodology:,This study used a cross-sectional design with convenience sampling to recruit 20 children who attended a rehabilitation review clinic between September 2006 and September 2007. Participants completed the Child and Family Follow-up Survey (Bedell, 2004) to describe the participation of their children in home, school and community settings. The CFFS was developed based on the International Classification of Function, and uses parent report to measure the impact of impairments and environmental factors on children's participation in home, school and community life. Results:,The children were reported to have the greatest participation restrictions for structured events in the community, and social, play or leisure activities with peers either at school or in the community. Children were least restricted moving about in and around their own homes. Conclusions:,This research describes difficulties encountered by Australian children with ABI in participating in community-based activities with their same aged peers. This study adds to the current literature describing patterns of participation of United States children who have sustained brain injuries, and provides useful information for Australian therapists to consider when addressing children's return to school and engagement with their peers following brain injury. [source] | ||||||||||