5,882 research outputs found
Pregnancy with gestational hypertension or preeclampsia: A qualitative exploration of women's experiences
Β© 2017 Elsevier Ltd Background Hypertension complicates 10% of pregnancies and involves specialised care of the woman and her baby, a longer stay in hospital, and an increased risk of physical and mental morbidity. There is limited research reporting the woman's perspective on her experience, how she coped with it psychologically, and whether the care she received influenced her experience. Aim To gain insight into women's experience of hypertension in pregnancy and to report on what mediating factors may help improve their experience. Methods A qualitative descriptive study was undertaken. Data were collected through a semi-structured, face to face interview at 10β12 months postpartum. In total, 20 women who had experienced hypertension in their pregnancy were interviewed. Thematic analysis was used to analyse the data. Findings Four main themes were identified. These were: Reacting to the diagnosis, Challenges of being a mother, Processing and accepting the situation, and Moving on from the experience. The mediating factors that improved the experience were Feeling safe and trusting the care providers, Having continuity of care and carer, and Valuing social support from partner, family and friends. Conclusion The diagnosis of hypertension in pregnancy has a significant impact on women. This affects their pregnancy and birth experience and their pathway to motherhood. The implications of the findings for midwifery practice include having access to multidisciplinary continuity models of care and facilitating the support for these women
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REGIONAL DISTRIBUTION OF GABAERGIC NEURONS AND AXON TERMINALS IN THE BRAIN-STEM AUDITORY NUCLEI OF THE GERBIL
The Effect of Focal Damage to the Right Medial Posterior Cerebellum on Word and Sentence Comprehension and Production
Functional imaging studies of neurologically intact adults have demonstrated that the
right posterior cerebellum is activated during verb generation, semantic processing,
sentence processing, and verbal fluency. Studies of patients with cerebellar damage
converge to show that the cerebellum supports sentence processing and verbal
fluency. However, to date there are no patient studies that investigated the specific
importance of the right posterior cerebellum in language processing, because: (i)
case studies presented patients with lesions affecting the anterior cerebellum (with or
without damage to the posterior cerebellum), and (ii) group studies combined patients
with lesions to different cerebellar regions, without specifically reporting the effects
of right posterior cerebellar damage. Here we investigated whether damage to the
right posterior cerebellum is critical for sentence processing and verbal fluency in four
patients with focal stroke damage to different parts of the right posterior cerebellum (all
involving Crus II, and lobules VII and VIII). We examined detailed lesion location by going
beyond common anatomical definitions of cerebellar anatomy (i.e., according to lobules
or vascular territory), and employed a recently proposed functional parcellation of the
cerebellum. All four patients experienced language difficulties that persisted for at least a
month after stroke but three performed in the normal range within a year. In contrast, one
patient with more damage to lobule IX than the other patients had profound long-lasting
impairments in the comprehension and repetition of sentences, and the production of
spoken sentences during picture description. Spoken and written word comprehension
and visual recognition memory were also impaired, however, verbal fluency was within
the normal range, together with object naming, visual perception and verbal shortterm
memory. This is the first study to show that focal damage to the right posterior
cerebellum leads to language difficulties after stroke; and that processing impairments
persisted in the case with most damage to lobule IX. We discuss these results in
relation to current theories of cerebellar contribution to language processing. Overall, our study highlights the need for longitudinal studies of language function in patients
with focal damage to different cerebellar regions, with functional imaging to understand
the mechanisms that support recovery
Assessing Australian women's knowledge and knowledge preferences about long-term health after hypertensive disorders of pregnancy: a survey study.
OBJECTIVES: To (1) assess women's current knowledge regarding long-term cardiovascular health after hypertensive disorders of pregnancy (2) elicit women's preferred educational content and format regarding health after hypertensive disorders of pregnancy. DESIGN AND SETTING: A custom-created online survey exploring Australian women's knowledge about long-term health after hypertensive disorders of pregnancy, distributed through consumer groups and social media. PARTICIPANTS: 266 women with (n=174) or without (n=92) a history of hypertensive disorders of pregnancy. PRIMARY AND SECONDARY OUTCOME MEASURES: (1) Proportion of women identifying long-term health risks after hypertensive disorder of pregnancy using a 10-point risk knowledge score with 0-4 'low', 4.1-7.0 'moderate' and 7.1-10 'high'. (2) Exploration of preferred content, format and distribution of educational material post hypertensive disorder of pregnancy. RESULTS: Knowledge scores about health after hypertensive disorder of pregnancy were moderate in groups with and without a history of the disorder. Knowledge was highest regarding risk of recurrent hypertensive disorders in a subsequent pregnancy, 'moderate' for chronic hypertension and heart attack, 'moderate' and 'low' regarding risk of heart disease and 'low' for diabetes and renal disease. Only 36% of all participants were aware that risks start within 10 years after the affected pregnancy. The majority of respondents with a history of hypertensive disorder of pregnancy (76%) preferred receiving information about long-term health 0-6 months post partum from a healthcare provider (80%), key organisations (60%), social media (47%) and brochures/flyers (43%). CONCLUSIONS: Women's knowledge regarding health risks after hypertensive disorder of pregnancy was 'moderate', although with important disease-specific gaps such as increased risk of diabetes. Most women wanted to be informed about their long-term health from a healthcare provider
Scale Dependence of Dark Energy Antigravity
We investigate the effects of negative pressure induced by dark energy
(cosmological constant or quintessence) on the dynamics at various
astrophysical scales. Negative pressure induces a repulsive term (antigravity)
in Newton's law which dominates on large scales. Assuming a value of the
cosmological constant consistent with the recent SnIa data we determine the
critical scale beyond which antigravity dominates the dynamics () and discuss some of the dynamical effects implied. We show that
dynamically induced mass estimates on the scale of the Local Group and beyond
are significantly modified due to negative pressure. We also briefly discuss
possible dynamical tests (eg effects on local Hubble flow) that can be applied
on relatively small scales (a few ) to determine the density and equation
of state of dark energy.Comment: Contributed talk at the 2nd Hellenic Cosmology Workshop at NOA
(Athens) Jan. 2001.To appear in the proceedings. Based on work done in
collaboration with M. Axenides and E. Florato
Right cerebral motor areas that support accurate speech production following damage to cerebellar speech areas
Specific regions of the cerebellum are activated when neurologically intact adults speak, and cerebellar damage can impair speech production early after stroke, but how the brain supports accurate speech production years after cerebellar damage remains unknown. We investigated this in patients with cerebellar lesions affecting regions that are normally recruited during speech production. Functional MRI activation in these patients, measured during various single word production tasks, was compared to that of neurologically intact controls, and patient controls with lesions that spared the cerebellar speech production regions. Our analyses revealed that, during a range of speech production tasks, patients with damage to cerebellar speech production regions had greater activation in the right dorsal premotor cortex (r-PMd) and right supplementary motor area (r-SMA) compared to neurologically intact controls. The loci of increased activation in cerebral motor speech areas motivate future studies to delineate the functional contributions of different parts of the speech production network, and test whether non-invasive stimulation to r-PMd and r-SMA facilitates speech recovery after cerebellar stroke
Cryotomography of budding influenza a virus reveals filaments with diverse morphologies that mostly do not bear a genome at their distal end
Influenza viruses exhibit striking variations in particle morphology between strains. Clinical isolates of influenza A virus have been shown to produce long filamentous particles while laboratory-adapted strains are predominantly spherical. However, the role of the filamentous phenotype in the influenza virus infectious cycle remains undetermined. We used cryo-electron tomography to conduct the first three-dimensional study of filamentous virus ultrastructure in particles budding from infected cells. Filaments were often longer than 10 microns and sometimes had bulbous heads at their leading ends, some of which contained tubules we attribute to M1 while none had recognisable ribonucleoprotein (RNP) and hence genome segments. Long filaments that did not have bulbs were infrequently seen to bear an ordered complement of RNPs at their distal ends. Imaging of purified virus also revealed diverse filament morphologies; short rods (bacilliform virions) and longer filaments. Bacilliform virions contained an ordered complement of RNPs while longer filamentous particles were narrower and mostly appeared to lack this feature, but often contained fibrillar material along their entire length. The important ultrastructural differences between these diverse classes of particles raise the possibility of distinct morphogenetic pathways and functions during the infectious process
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