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Barnes J, Senior R, MacPherson K. The utility of volunteer home-visiting support to prevent maternal depression in the first year of life. Child Care Health Dev 2009; 35:807-16. [PMID: 19719770 DOI: 10.1111/j.1365-2214.2009.01007.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND Maternal depression can be detrimental to infant development. Structured home visiting initiated either in pregnancy or soon after the birth by a professional has led to better outcomes for mothers and their children but some vulnerable families may respond more favourably to a local volunteer. The value of volunteer support provided in the UK by Home-Start for maternal well-being is noted in qualitative studies, but there is no evidence of its impact from trials. The support is not structured and both the frequency and content of visits may vary. METHODS A cluster randomized study allocated Home-Start local schemes to intervention or control conditions. Mothers in all areas were screened at routine health checks in late pregnancy. In intervention areas names of those scoring 9+ on the Social Disadvantage Screening Index were passed to Home-Start to be offered a volunteer. Not all those offered the support accepted the offer. In control areas no support was offered. Research assessments were conducted at 2 and 12 months. The outcomes were major or minor depression occurring between 2 and 12 months (Structured Clinical Interview for Diagnostic and Statistical Manual - Third Edition - Revised) and depression symptoms at 12 months (Edinburgh Postnatal Depression Scale). Three groups were compared: supported, case-matched controls and those offered but not receiving support. RESULTS Almost one-third experienced depression during the time period. Volunteer support had no identifiable impact on the emergence of maternal depression from 2 to 12 months or on depression symptoms when infants were 12 months. The major predictor of both was depression identified at 2 months. CONCLUSIONS It was not found that informal support initiated following screening for disadvantage in pregnancy reduced the likelihood of depression for mothers with infants.
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Barnes J, Morris A. A study of impairing injuries in real world crashes using the Injury Impairment Scale (IIS) and the predicted Functional Capacity Index (PFCI-AIS). ANNALS OF ADVANCES IN AUTOMOTIVE MEDICINE. ASSOCIATION FOR THE ADVANCEMENT OF AUTOMOTIVE MEDICINE. ANNUAL SCIENTIFIC CONFERENCE 2009; 53:195-205. [PMID: 20184844 PMCID: PMC3256809] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The ability to predict impairment outcomes in large databases using a simplified technique allows researchers to focus attention on preventing costly impairing injuries. The dilemma that exists for researchers is to determine which method is the most reliable and valid. This study examines available methods to predict impairment and explores the differences between the IIS and pFCI applied to real world crash injury data. Occupant injury data from the UK Co-operative Crash Injury Study (CCIS) database have been coded using AIS 1990 and AIS 2005. The data have subsequently been recoded using the associated impairment scales namely the Injury Impairment Scale (IIS) and the predicted Functional Capacity Index (pFCI) to determine the predicted impairment levels of injuries at one year post crash. Comparisons between the levels of impairment were made and any differences further explored. Injury data for the period February 2006 to September 2008 from the CCIS database were used in the analysis which involved a dataset of 2,437 occcupants who sustained over 8000 injuries. This study found some differences between the impairment scales for injuries coded to the AIS 1990 and AIS 2005 coding dictionaries. The pFCI predicts 31.5% of injuries to be impairing in AIS 2005, less than the IIS (38.5%) using AIS 1990. Using CCIS data the pFCI predicted that only 6% of the occupants with a coded injury would have an impairing injury compared to 24% of occupants using the IIS. The main body regions identified as having the major differences between the two impairment scales for car occupants were the head and spine. Follow up data were then used for a small number of cases (n=31, lower extremity and whiplash injuries) to examine any differences in predicted impairment versus perceived impairment. These data were selected from a previous study conducted between 2003 and 2006 and identified the discrepancy between predicted impairment and actual perceived impairment as defined by the participant. Overall the work highlights the variation between the pFCI and IIS and emphasises the importance and need for a single validated impairment scale that can be universally applied. This would allow emphasis to be directed towards preventing injuries that are associated with the most significant impairment outcomes.
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Barnes J, Hassan A, Cuerden R, Cookson R, Kohlhofer J. Comparison of injury severity between AIS 2005 and AIS 1990 in a large injury database. ANNALS OF ADVANCES IN AUTOMOTIVE MEDICINE. ASSOCIATION FOR THE ADVANCEMENT OF AUTOMOTIVE MEDICINE. ANNUAL SCIENTIFIC CONFERENCE 2009; 53:83-89. [PMID: 20184835 PMCID: PMC3256797] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The aim of this study is to investigate the differences in car occupant injury severity recorded in AIS 2005 compared to AIS 1990 and to outline the likely effects on future data analysis findings. Occupant injury data in the UK Cooperative Crash Injury Study Database (CCIS) were coded for the period February 2006 to November 2007 using both AIS 1990 and AIS 2005. Data for 1,994 occupants with over 6000 coded injuries were reviewed at the AIS and MAIS level of severities and body regions to determine changes between the two coding methodologies. Overall there was an apparent general trend for fewer injuries to be coded at the AIS 4+ severity and more injuries to be coded at the AIS 2 severity. When these injury trends were reviewed in more detail it was found that the body regions which contributed the most to these changes in severity were the head, thorax and extremities. This is one of the first studies to examine the implications for large databases when changing to an updated method for coding injuries.
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Minnis H, Green J, O'Connor TG, Liew A, Glaser D, Taylor E, Follan M, Young D, Barnes J, Gillberg C, Pelosi A, Arthur J, Burston A, Connolly B, Sadiq FA. An exploratory study of the association between reactive attachment disorder and attachment narratives in early school-age children. J Child Psychol Psychiatry 2009; 50:931-42. [PMID: 19344386 DOI: 10.1111/j.1469-7610.2009.02075.x] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
OBJECTIVE To explore attachment narratives in children diagnosed with reactive attachment disorder (RAD). METHOD We compared attachment narratives, as measured by the Manchester Child Attachment Story Task, in a group of 33 children with a diagnosis of RAD and 37 comparison children. RESULTS The relative risk (RR) for children with RAD having an insecure attachment pattern was 2.4 (1.4-4.2) but 30% were rated as securely attached. Within the RAD group, children with a clear history of maltreatment were more likely to be Insecure-Disorganised than children without a clear history of maltreatment. CONCLUSIONS Reactive attachment disorder is not the same as attachment insecurity, and questions remain about how attachment research informs clinical research on attachment disorders.
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Hennebry M, Stocks G, Belavadi P, Barnes J, Wray S, Columb M, Lyons G. Effect of i.v. phenylephrine or ephedrine on the ED50 of intrathecal bupivacaine with fentanyl for Caesarean section. Br J Anaesth 2009; 102:806-11. [DOI: 10.1093/bja/aep095] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
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Mannie ZN, Barnes J, Bristow GC, Harmer CJ, Cowen PJ. Memory impairment in young women at increased risk of depression: influence of cortisol and 5-HTT genotype. Psychol Med 2009; 39:757-762. [PMID: 18775088 DOI: 10.1017/s0033291708004248] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
BACKGROUND Memory deficits are common in depressed patients and may persist after recovery. The aim of the present study was to determine whether memory impairments were present in young women at increased familial risk of depression and whether memory performance was related either to cortisol secretion or to allelic variation in the promoter region of the serotonin transporter gene (5-HTT). METHOD Young women (n=35, age range 16-21 years) with no personal history of depression but with a depressed parent (FH+) carried out the Rey Auditory Verbal Learning Test (RAVLT). They also provided samples for the measurement of waking salivary cortisol and for 5-HTT genotyping. An age-matched control group of women (n=31) with no family history of depression were similarly studied. RESULTS The FH+ participants had decreased immediate recall and recognition memory compared to controls. The impairment in recall, but not recognition, correlated negatively with increased cortisol secretion in FH+ subjects. There was no significant effect of 5-HTT allelic status on either memory or waking cortisol secretion. CONCLUSIONS Impairments in declarative memory are present in young women at increased genetic risk of depression and may be partly related to increased cortisol secretion. Further studies are needed to explore the neural mechanisms underlying the memory impairments and whether they predict the development of clinical illness.
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Rutherford E, Barnes J. XXXV. Efficiency of production of X rays from a Coolidge tube. ACTA ACUST UNITED AC 2009. [DOI: 10.1080/14786440908635406] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Rutherford E, Barnes J, Richardson H. XXXIV. Maximum frequency of the X rays from a Coolidge tube for different voltages. ACTA ACUST UNITED AC 2009. [DOI: 10.1080/14786440908635405] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Chan D, Anderson V, Pijnenburg Y, Whitwell J, Barnes J, Scahill R, Stevens JM, Barkhof F, Scheltens P, Rossor MN, Fox NC. The clinical profile of right temporal lobe atrophy. Brain 2009; 132:1287-98. [DOI: 10.1093/brain/awp037] [Citation(s) in RCA: 226] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Henneman WJP, Sluimer JD, Barnes J, van der Flier WM, Sluimer IC, Fox NC, Scheltens P, Vrenken H, Barkhof F. Hippocampal atrophy rates in Alzheimer disease: added value over whole brain volume measures. Neurology 2009; 72:999-1007. [PMID: 19289740 PMCID: PMC2821835 DOI: 10.1212/01.wnl.0000344568.09360.31] [Citation(s) in RCA: 242] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE To investigate the added value of hippocampal atrophy rates over whole brain volume measurements on MRI in patients with Alzheimer disease (AD), patients with mild cognitive impairment (MCI), and controls. METHODS We included 64 patients with AD (67 +/- 9 years; F/M 38/26), 44 patients with MCI (71 +/- 6 years; 21/23), and 34 controls (67 +/- 9 years; 16/18). Two MR scans were performed (scan interval: 1.8 +/- 0.7 years; 1.0 T), using a coronal three-dimensional T1-weighted gradient echo sequence. At follow-up, 3 controls and 23 patients with MCI had progressed to AD. Hippocampi were manually delineated at baseline. Hippocampal atrophy rates were calculated using regional, nonlinear fluid registration. Whole brain baseline volumes and atrophy rates were determined using automated segmentation and registration tools. RESULTS All MRI measures differed between groups (p < 0.005). For the distinction of MCI from controls, larger effect sizes of hippocampal measures were found compared to whole brain measures. Between MCI and AD, only whole brain atrophy rate differed significantly. Cox proportional hazards models (variables dichotomized by median) showed that within all patients without dementia, hippocampal baseline volume (hazard ratio [HR]: 5.7 [95% confidence interval: 1.5-22.2]), hippocampal atrophy rate (5.2 [1.9-14.3]), and whole brain atrophy rate (2.8 [1.1-7.2]) independently predicted progression to AD; the combination of low hippocampal volume and high atrophy rate yielded a HR of 61.1 (6.1-606.8). Within patients with MCI, only hippocampal baseline volume and atrophy rate predicted progression. CONCLUSION Hippocampal measures, especially hippocampal atrophy rate, best discriminate mild cognitive impairment (MCI) from controls. Whole brain atrophy rate discriminates Alzheimer disease (AD) from MCI. Regional measures of hippocampal atrophy are the strongest predictors of progression to AD.
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Lewis SN, West AF, Stein A, Malmberg LE, Bethell K, Barnes J, Sylva K, Leach P. A comparison of father-infant interaction between primary and non-primary care giving fathers. Child Care Health Dev 2009; 35:199-207. [PMID: 19054006 DOI: 10.1111/j.1365-2214.2008.00913.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND This study examined the socio-demographic characteristics and attitudes of primary care giving fathers and non-primary care giving fathers and the quality of their interaction with their infants. METHOD Two groups of fathers of 11.9-month old infants were compared - 25 primary care giving fathers (20 h per week or more of sole infant care) and 75 non-primary care giving fathers - with regard to socio-demographic characteristics, attitudinal differences and father-infant interaction during play and mealtimes. The quality of father-child interaction in relation to the total number of hours of primary care provided by fathers was also examined. RESULTS Primary care giving fathers had lower occupational status and earned a smaller proportion of the family income but did not differ in educational level or attitudes compared with non-primary care giving fathers. There were no differences between the partners of the two groups of fathers on any variables, and their infants did not differ in temperament. Primary care giving fathers and their infants exhibited more positive emotional tone during play than non-primary care giving fathers, although fathers did not differ in responsivity. There were no differences between the groups during mealtimes. There was a positive association between total number of child care hours provided by all fathers and infant positive emotional tone. CONCLUSIONS Primary and non-primary care giving fathers were similar in many respects, but primary care giving fathers and their infants were happier during play. This suggests a possible link between the involvement of fathers in the care of their children and their children's emotional state. The finding of a trend towards increased paternal happiness with increased hours of child care suggests that there may also be a gain for fathers who are more involved in the care of their infants. Further research is needed to determine whether these differences ultimately have an effect on children's development.
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West AF, Lewis S, Ram B, Barnes J, Leach P, Sylva K, Stein A. Why do some fathers become primary caregivers for their infants? A qualitative study. Child Care Health Dev 2009; 35:208-16. [PMID: 19228155 DOI: 10.1111/j.1365-2214.2008.00926.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND Despite recent advances, research on father-infant relations is still relatively lacking. One hitherto neglected area is the subjective experience of primary caregiving (PCG) fathers, including their reasons for taking on a PCG role. METHOD Twenty-five PCG fathers, defined as those providing sole child care for their 1-year-old infant for at least 20 waking hours a week, completed semi-structured interviews as part of a large two-centre English study of child care. Interviews were tape-recorded, transcribed and analysed using emergent theme analysis. Themes with a bearing on the fathers' explicit and implicit reasons for providing relatively high levels of sole child care were grouped using an iterative process of independent analysis, comparison and rechecking. RESULTS Reasons included mother's and father's employment situation and relative earning power, the absence of acceptable alternative child care, perceptions of societal values, maternal and paternal health, family history and ideological values. Flexibility of paternal employment, or its relative unimportance, and motivation or willingness on the part of the father to share in child care were invariably present. For some, the fact of one or other of their own parents having been emotionally distant or physically absent had led to a determination to do things differently with their own children. Fathers reported that they valued the increased time spent with their child, even if they had not been consciously motivated beforehand. CONCLUSIONS Fathers describe a wide range of reasons for becoming primary caregivers for their infant, and generally experience themselves as being actively involved in that decision. If fathers are to take an increasing role in child care, societal values and financial pressure may need to be addressed.
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Rohrer JD, McNaught E, Foster J, Clegg SL, Barnes J, Omar R, Warrington EK, Rossor MN, Warren JD, Fox NC. Tracking progression in frontotemporal lobar degeneration: serial MRI in semantic dementia. Neurology 2008; 71:1445-51. [PMID: 18955688 DOI: 10.1212/01.wnl.0000327889.13734.cd] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND Semantic dementia is a sporadic neurodegenerative disorder characterized by the progressive erosion of semantic processing and is one of the canonical subtypes of frontotemporal lobar degeneration. This study aimed to characterize the pattern of global and regional longitudinal brain atrophy in semantic dementia and to identify imaging biomarkers that could underpin therapeutic trials. METHODS Twenty-one patients with semantic dementia (including eight pathologically confirmed cases) underwent whole-brain and region-of-interest analyses on volumetric brain MRI scans at two time points. Sample size estimates for trials were subsequently calculated using these data. RESULTS Mean (SD) whole-brain atrophy rate was 39.6 (31.9) mL/y [3.2 (12.0) mL/y in controls], with ventricular enlargement of 8.9 (4.4) mL/y [1.0 (1.0) mL/y in controls]. All patients had a smaller left temporal lobe at baseline [left mean 31.9 (6.9) mL, right mean 49.2 (9.5) mL; p < 0.0001]; however, the mean rate of atrophy was significantly greater in the right temporal lobe [right 3.9 (1.7) mL/y, left 2.8 (1.2) mL/y; p = 0.02]. Similarly, whereas the left hippocampus was smaller at baseline, the mean atrophy rate was significantly greater in the right hippocampus. Using the atrophy rates generated, sample size requirements for clinical trials were found to be smallest for temporal lobe measurement. CONCLUSIONS These findings show that the rate of tissue loss in the right temporal lobe overtakes the left temporal lobe as semantic dementia evolves, consistent with the later development of symptoms attributable to right temporal lobe dysfunction. Furthermore, our findings demonstrate that MRI measures of temporal lobe volume loss could provide a feasible and sensitive index of disease progression in semantic dementia.
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Nirmal Rajkumar A, Barnes J, Ramesh R, Purvaja R, Upstill-Goddard RC. Methane and nitrous oxide fluxes in the polluted Adyar River and estuary, SE India. MARINE POLLUTION BULLETIN 2008; 56:2043-51. [PMID: 18814890 DOI: 10.1016/j.marpolbul.2008.08.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2008] [Revised: 08/06/2008] [Accepted: 08/07/2008] [Indexed: 05/06/2023]
Abstract
We measured dissolved N(2)O, CH(4), O(2), NH(4)(+), NO(3)(-) and NO(2)(-) on 7 transects along the polluted Adyar River-estuary, SE India and estimated N(2)O and CH(4) emissions using a gas exchange relation and a floating chamber. High NO(2)(-) implied some nitrification of a large anthropogenic NH(4)(+) pool. In the lower catchment CH(4) was maximal (6.3+/-4.3 x 10(4)nM), exceeding the ebullition threshold, whereas strong undersaturation of N(2)O and O(2) implied intense denitrification. Emissions fluxes for the whole Adyar system approximately 2.5 x 10(8) g CH(4)yr(-1) and approximately 2.4 x 10(6)gN(2)O yr(-1) estimated with a gas exchange relation and approximately 2 x 10(9) g CH(4)yr(-1) derived with a floating chamber illustrate the importance of CH(4) ebullition. An equivalent CO(2) flux approximately 1-10 x 10(10)gy r(-1) derived using global warming potentials is equivalent to total Chennai motor vehicle CO(2) emissions in one month. Studies such as this may inform more effective waste management and future compliance with international emissions agreements.
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Stein A, Malmberg LE, Sylva K, Barnes J, Leach P. The influence of maternal depression, caregiving, and socioeconomic status in the post-natal year on children's language development. Child Care Health Dev 2008; 34:603-12. [PMID: 18549438 DOI: 10.1111/j.1365-2214.2008.00837.x] [Citation(s) in RCA: 116] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
BACKGROUND Post-natal depression is common and has been associated with adverse effects on children's later emotional and behavioural development. The evidence for effects on children's cognitive development is unclear but this could potentially be a major public health issue. The aim was to examine whether maternal depression and maternal caregiving during the first year of life are associated with children's subsequent language development. METHODS One thousand two hundred and one women were recruited from antenatal and post-natal baby clinics in two areas in England, and followed up until their babies were 3 years. Mothers and children were assessed by questionnaire, interview and home observation; 999 children's language was assessed at 36 months, although 55 were excluded principally because they had been exposed to insufficient English. RESULTS In bivariate analyses maternal depressive symptomatology in the post-natal year but not at 36 months was associated with poorer child language at 36 months; maternal caregiving, was positively associated with language. Structural Equation Modelling revealed that depression was associated with poorer caregiving but was not independently associated with language. Higher quality caregiving at 10 months was associated with better language. When the sample was split by socioeconomic factors the effects of depression on caregiving were stronger in the less advantaged group. In both groups poorer quality early caregiving predicted lower language outcome. CONCLUSIONS Post-natal depression had a negative effect on caregiving, which in turn affected language; post-natal depression did not have an additional direct effect on language. Socioeconomic factors moderated the effects of depression on caregiving. When targeting interventions at mothers with post-natal depression, it may be strategic to focus on lower socioeconomic groups at higher risk.
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Barnes J, Carver B, Fraser JM, Gagliardi G, Loock HP, Tian Z, Wilson MWB, Yam S, Yastrubshak O. Loss determination in microsphere resonators by phase-shift cavity ring-down measurements. OPTICS EXPRESS 2008; 16:13158-13167. [PMID: 18711554 DOI: 10.1364/oe.16.013158] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The optical loss of whispering gallery modes of resonantly excited microresonator spheres is determined by optical lifetime measurements. The phase-shift cavity ring-down technique is used to extract ring-down times and optical loss from the difference in amplitude modulation phase between the light entering the microresonator and light scattered from the microresonator. In addition, the phase lag of the light exiting the waveguide, which was used to couple light into the resonator, was measured. The intensity and phase measurements were fully described by a model that assumed interference of the cavity modes with the light propagating in the waveguide.
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Matz D, Wuttke S, Barnes J. Scaling of toe pad forces in Litoria caerulea provides insights into mechanisms of adhesion, friction and detachment in tree frogs. Comp Biochem Physiol A Mol Integr Physiol 2008. [DOI: 10.1016/j.cbpa.2008.04.169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Wuttke S, Matz D, Barnes J. Sticky solutions: How the tree frog Litoria caerulea solves the allometry problem. Comp Biochem Physiol A Mol Integr Physiol 2008. [DOI: 10.1016/j.cbpa.2008.04.168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Barnes J, Macauley M, Neidhardt J, Layne J. Varying the sign and gain of optomotor feedback provides insights into mechanisms of course control in walking land crabs, Cardisoma guanhumi. Comp Biochem Physiol A Mol Integr Physiol 2008. [DOI: 10.1016/j.cbpa.2008.04.306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Tandon L, Hastings E, Banar J, Barnes J, Beddingfield D, Decker D, Dyke J, Farr D, FitzPatrick J, Gallimore D, Garner S, Gritzo R, Hahn T, Havrilla G, Johnson B, Kuhn K, LaMont S, Langner D, Lewis C, Majidi V, Martinez P, McCabe R, Mecklenburg S, Mercer D, Meyers S, Montoya V, Patterson B, Pereyra RA, Porterfield D, Poths J, Rademacher D, Ruggiero C, Schwartz D, Scott M, Spencer K, Steiner R, Villarreal R, Volz H, Walker L, Wong A, Worley C. Nuclear, chemical, and physical characterization of nuclear materials. J Radioanal Nucl Chem 2008. [DOI: 10.1007/s10967-008-0528-7] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Barnes J, Foster J, Boyes R, Pepple T, Moore E, Schott J, Frost C, Scahill R, Fox N. A comparison of methods for the automated calculation of volumes and atrophy rates in the hippocampus. Neuroimage 2008; 40:1655-71. [DOI: 10.1016/j.neuroimage.2008.01.012] [Citation(s) in RCA: 97] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2007] [Revised: 11/23/2007] [Accepted: 01/05/2008] [Indexed: 11/28/2022] Open
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Barnes J, Boubert L. Executive functions are impaired in patients with Parkinson's disease with visual hallucinations. J Neurol Neurosurg Psychiatry 2008; 79:190-2. [PMID: 18202206 DOI: 10.1136/jnnp.2007.116202] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
OBJECTIVES Although cognitive impairment has been identified as a risk factor for visual hallucinations (VHs), more specific neuropsychological deficits underlying such phenomena have not been established. Here, we investigate the link between executive dysfunction and the occurrence of VHs. METHODS We evaluated three groups--17 patients with Parkinson's disease (PD) with VHs, 20 patients with PD without VHs and 20 age-matched controls--on a battery of tests previously reported to evaluate executive functions, namely tests of inhibitory ability, short-term memory and working memory. RESULTS Differences were found on tests of inhibitory ability, for which the patient group with VHs showed impairment when compared with the non-hallucinating group. CONCLUSIONS Patients with PD with VHs have substantially greater impairment of inhibitory ability than patients without VHs. These findings support interactive models of the genesis of visual hallucinations in PD.
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Uppal SO, Li Y, Wendt E, Cayer ML, Barnes J, Conway D, Boudreau N, Heckman CA. Pattern analysis of microtubule-polymerizing and -depolymerizing agent combinations as cancer chemotherapies. Int J Oncol 2008; 31:1281-91. [PMID: 17982653 DOI: 10.3892/ijo.31.6.1281] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Subcellular distribution of mass can be analyzed by a technique that involves culturing cells on interferometers and digitizing their interference contours. Contour sampling resulted in 102 variables per cell, which were predictors of oncogenic transformation. Cell phenotypes can be deconstructed by use of latent factors, which represent the covariance of the real variables. The reversal of the cancer-type phenotype by a combination of microtubule-stabilizing and -depolymerizing agents was described previously. The implications of these results have been explored by clinicians who treated patients with the combination of docetaxel and vinorelbine (Navelbine). The current study was performed to determine the effects of different combinations on phenotype and in phases of the cell cycle other than mitosis. Combinations of paclitaxel with either colchicine, podophyllotoxin, nocodazole, or vinblastine caused phenotype reversal. Paclitaxel analogue, 7-deoxytaxol, by itself caused reversal. Factors #4, (filopodia), #5 (displacement and/or deep invaginations in the periphery), #8, and #12 took on values typical of normal cells, whereas the values of #7 (p21-activated kinase), and #13 (rounding up) shifted toward the cancer-type. All combinations altered microtubule arrangement at the cell edge. Delivery schedules and drug ratios used in clinical studies were subjected to analysis. Clinical response rates were better when the combination was not interspersed with a single agent (P=0.004). The results support the idea that efficacy depends upon simultaneous exposure to both agents, and suggest a novel mechanism for combination therapies. These therapies appear to restore in transformed cells some of the features of a contact-inhibited cell, and to impede progress through the cell cycle even when provided at nanomolar concentrations.
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