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Tufton A, Ronchi V, Buckley R, Heath M, Laborde K, Wiltz D, Thaljeh L, Ogden B, Good M, Barkemeyer B, Spedale S, McDaniel L, Fang Z, Kim S. Noninvasive monitoring biomarker for neonatal necrotizing enterocolitis. Am J Med Sci 2023. [DOI: 10.1016/s0002-9629(23)00601-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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2
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Kirk S, Rashid H, Demisse E, Wilson T, Heath M, De-Kam P. NON-CLINICAL SAFETY EVALUATION OF A NOVEL THERAPEUTIC VACCINE FOR PEANUT ALLERGY. Ann Allergy Asthma Immunol 2022. [DOI: 10.1016/j.anai.2022.08.673] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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3
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Lin X, He T, Heath M, Chi P, Hinshaw S. A Systematic Review of Multiple Family Factors Associated with Oppositional Defiant Disorder. Int J Environ Res Public Health 2022; 19:10866. [PMID: 36078582 PMCID: PMC9517877 DOI: 10.3390/ijerph191710866] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 08/26/2022] [Accepted: 08/27/2022] [Indexed: 05/25/2023]
Abstract
Oppositional Defiant Disorder (ODD) is characterized by a recurrent pattern of angry/irritable emotional lability, argumentative/defiant behavior, and vindictiveness. Previous studies indicated that ODD typically might originate within a maladaptive family environment, or was at least maintained within such an environment. As such, the present review summarized pertinent research from the last 20 years that focused on the pathways connecting family risk factors to the development of child ODD symptoms. A systematic search of electronic databases was completed in August 2020, resulting in the inclusion of 62 studies in the review. The review established a multi-level framework to describe the mechanisms underlying the pathway from familial factors to ODD psychopathological symptoms: (a) the system level that is affected by the family's socioeconomic status and family dysfunction; (b) the dyadic level that is affected by conflict within the marital dyad and parent-child interactions; and (c) the individual level that is affected by parent and child factors. Additionally, from the perspective of family systems theory, we pay special attention to the interactions among and between the various levels of the pathway (moderation and mediation) that might be associated with the occurrence and severity of ODD symptoms. Considering future prevention and intervention efforts, this three-level model emphasizes the necessity of focusing on familial risk factors at multiple levels and the mechanisms underlying the proposed pathways.
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Affiliation(s)
- Xiuyun Lin
- School of Developmental Psychology, Faculty of Psychology, Beijing Normal University, Beijing 100875, China
| | - Ting He
- School of Developmental Psychology, Faculty of Psychology, Beijing Normal University, Beijing 100875, China
| | - Melissa Heath
- McKay School of Education, Brigham Young University, Provo, UT 84602, USA
| | - Peilian Chi
- Department of Psychology, University of Macau, Macau 999078, China
| | - Stephen Hinshaw
- Department of Psychology, University of California, Berkeley, CA 94720, USA
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Watson C, Cutrer-Párraga EA, Heath M, Miller EE, Young TA, Wilson S. Very Young Child Survivors' Perceptions of Their Father's Suicide: Exploring Bibliotherapy as Postvention Support. Int J Environ Res Public Health 2021; 18:11384. [PMID: 34769898 PMCID: PMC8582906 DOI: 10.3390/ijerph182111384] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Revised: 10/25/2021] [Accepted: 10/27/2021] [Indexed: 12/28/2022]
Abstract
Each year in the United States, 7000 to 30,000 children experience their parent's suicide. Due to the stigma associated with suicide, feelings of guilt, and intense grief, surviving family members avoid talking about suicide. Over time, children struggle with confusion and intense emotions associated with their parent's suicide. In this study, seven adults, who reported being younger than six years old at the time of their father's suicide, participated in individual semi-structured interviews. Participants' responses highlight the challenges that young children face due to limited memories of their deceased parent. Interviews concluded with an opportunity for participants to review and express their impressions of 10 children's picture books. Participants offered impressions about how these books may or may not be helpful in supporting young child survivors. Implications for applied practice include considering how children's literature may open communication and assist children in navigating Worden's tasks of grief: (a) accepting the reality of their parent's death; (b) facing the grief and pain; (c) adapting to life changes due to their father's suicide, in particular adapting to altered family relationships; and (d) building memories of the deceased loved one, when possible, to ensure healthy attachment to the deceased parent. Participants' insights provide considerations for selecting children's literature for bibliotherapy. Due to young child survivors' increased risk for attempting and completing suicide, supporting child survivors of parent suicide not only addresses postvention needs but aligns with suicide prevention.
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Affiliation(s)
- Cortland Watson
- Maricopa Unified School District 1, 44150 W Maricopa-Casa Grande Hwy, Maricopa, AZ 85138, USA;
| | | | - Melissa Heath
- Counseling Psychology and Special Education, 340 MCKB, Brigham Young University, Provo, UT 84602, USA;
| | - Erica E. Miller
- BYU-Marriott School of Business, N. Eldon Tanner Building (TNRB) Campus, Provo, UT 84602, USA;
| | - Terrell A. Young
- Teacher Education, 205 F, McKay School of Education, Brigham Young University, Provo, UT 84602, USA;
| | - Suzanne Wilson
- Davis School District, 45 E. State St., P.O. Box 588, Farmington, UT 84025, USA;
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Petrie T, Larson C, Heath M, Samatham R, Davis A, Berry E, Leachman S. Quantifying acceptable artefact ranges for dermatologic classification algorithms. Skin Health and Disease 2021; 1:e19. [PMID: 35664971 PMCID: PMC9060017 DOI: 10.1002/ski2.19] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Revised: 01/26/2021] [Accepted: 01/28/2021] [Indexed: 12/02/2022]
Abstract
Background Many classifiers have been developed that can distinguish different types of skin lesions (e.g., benign nevi, melanoma) with varying degrees of success.1–5 However, even successfully trained classifiers may perform poorly on images that include artefacts. While problems created by hair and ink markings have been published, quantitative measurements of blur, colour and lighting variations on classification accuracy has not yet been reported to our knowledge. Objectives We created a system that measures the impact of various artefacts on machine learning accuracy. Our objectives were to (1) quantitatively identify the most egregious artefacts and (2) demonstrate how to assess a classification algorithm's accuracy when input images include artefacts. Methods We injected artefacts into dermatologic images using techniques that could be controlled with a single variable. This allows us to quantitatively evaluate the impact on the accuracy. We trained two convolutional neural networks on two different binary classification tasks and measured the impact on dermoscopy images over a range of parameter values. The area under the curve and specificity‐at‐a‐given‐sensitivity values were measured for each artefact induced at each parameter. Results General blur had the strongest negative effect on the melanoma versus other task. Conversely, shifting the hue towards blue had a more pronounced effect on the suspicious versus follow task. Conclusions Classifiers should either mitigate artefacts or detect them. Images should be excluded from diagnosis/recommendation when artefacts are present in amounts outside the machine perceived quality range. Failure to do so will reduce accuracy and impede approval from regulatory agencies.
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Affiliation(s)
- T.C. Petrie
- Department of Dermatology Oregon Health & Science University Portland Oregon USA
| | - C. Larson
- Department of Dermatology Oregon Health & Science University Portland Oregon USA
| | - M. Heath
- Department of Dermatology Oregon Health & Science University Portland Oregon USA
| | - R. Samatham
- Department of Dermatology Oregon Health & Science University Portland Oregon USA
| | - A. Davis
- Department of Dermatology Oregon Health & Science University Portland Oregon USA
| | - E.G. Berry
- Department of Dermatology Oregon Health & Science University Portland Oregon USA
| | - S.A. Leachman
- Department of Dermatology Oregon Health & Science University Portland Oregon USA
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Forbat E, Heath M, Shim TN. Psoriatic onycho-pachydermo-periostitis: a patient's perspective. Clin Exp Dermatol 2020; 46:231-232. [PMID: 32918490 DOI: 10.1111/ced.14408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Revised: 06/26/2020] [Accepted: 07/18/2020] [Indexed: 11/30/2022]
Affiliation(s)
- E Forbat
- Department of Dermatology, University Hospital Coventry and Warwickshire NHS Trust, Coventry, West Midlands, UK
| | - M Heath
- Department of Dermatology, University Hospital Coventry and Warwickshire NHS Trust, Coventry, West Midlands, UK
| | - T N Shim
- Department of Dermatology, University Hospital Coventry and Warwickshire NHS Trust, Coventry, West Midlands, UK
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Evans T, Poppe K, Rolleston A, Legget M, Stubbs M, Heath M, Aish S, Wells S, Richards A, Stewart R, Doughty R. A017 Cardiac Biomarkers to Guide Risk in Secondary Prevention Post-Acute Coronary Syndromes. Heart Lung Circ 2020. [DOI: 10.1016/j.hlc.2020.05.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Heath M, Virtanen S, Kuula-Paavola L, Gradisar M, Pesonen AK. Gender differences in the relationships between physical activity, sleep, and mood in Finnish adolescents. Sleep Med 2019. [DOI: 10.1016/j.sleep.2019.11.410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Morton DB, Jennings M, Batchelor GR, Bell D, Birke L, Davies K, Eveleigh JR, Gunn D, Heath M, Howard B, Koder P, Phillips J, Poole T, Sainsbury AW, Sales GD, Smith DJA, Stauffacher M, Turner RJ. Refinements in rabbit husbandry: Second report of the BVAAWF/FRAME/RSPCA/UFAW joint working group on refinement. Lab Anim 2016. [DOI: 10.1258/002367793780745633] [Citation(s) in RCA: 75] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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10
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Flannagan R, Heath M, Watson P, Wilkinson M, Mera S, Overfield J, Edwards-Jones V, McLellan D. Book Reviews. Br J Biomed Sci 2016. [DOI: 10.1080/09674845.2006.11732738] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Heath M, Hassall CD, MacLean S, Krigolson OE. Event-related brain potentials during the visuomotor mental rotation task: The contingent negative variation scales to angle of rotation. Neuroscience 2015; 311:153-65. [PMID: 26477986 DOI: 10.1016/j.neuroscience.2015.10.018] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2015] [Revised: 10/07/2015] [Accepted: 10/09/2015] [Indexed: 11/16/2022]
Abstract
Perceptual judgments about the angular disparity of a character from its standard upright (i.e., mental rotation task) result in a concurrent increase in reaction time (RT) and modulation of the amplitude of the P300 event-related brain potential (ERP). It has therefore been proposed that the P300 represents the neural processes associated with a visual rotation. In turn, the visuomotor mental rotation (VMR) task requires reaching to a location that deviates from a target by a predetermined angle. Although the VMR task exhibits a linear increase in RT with increasing oblique angles of rotation, work has not examined whether the task is supported via a visual rotation analogous to its mental rotation task counterpart. This represents a notable issue because seminal work involving non-human primates has ascribed VMR performance to the motor-related rotation of directionally tuned neurons in the primary motor cortex. Here we examined the concurrent behavioral and ERP characteristics of a standard reaching task and VMR tasks of 35°, 70°, and 105° of rotation. Results showed that the P300 amplitude was larger for the standard compared to each VMR task--an effect independent of the angle of rotation. In turn, the amplitude of the contingent negative variation (CNV)--an ERP related to cognitive and visuomotor integration for movement preparation--was systematically modulated with angle of rotation. Thus, we propose that the CNV represents an ERP correlate related to the cognitive and/or visuomotor transformation demands of increasing the angular separation between a stimulus and a movement goal.
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Affiliation(s)
- M Heath
- School of Kinesiology, University of Western Ontario, London, ON, Canada; Graduate Program in Neuroscience, University of Western Ontario, London, ON, Canada.
| | - C D Hassall
- Faculty of Education, University of Victoria, Victoria, BC, Canada
| | - S MacLean
- Department of Psychology and Neuroscience, Dalhousie University, Halifax, NS, Canada
| | - O E Krigolson
- Faculty of Education, University of Victoria, Victoria, BC, Canada; Division of Medical Sciences, University of Victoria, Victoria, BC, Canada
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Biddle ML, Adler NR, Heath M, Streat S, Wardrop M, Watson JP. Nurse-led clinic: effective and efficient delivery of assessment and review of patients with hepatitis B and C. Intern Med J 2015; 44:581-5. [PMID: 24612294 DOI: 10.1111/imj.12400] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2013] [Accepted: 02/15/2014] [Indexed: 11/29/2022]
Abstract
BACKGROUND Hepatology and gastroenterology services are increasingly utilising the skills and experience of nurse practitioners and nurse specialists to help meet the increasing demand for healthcare. A new nurse-led assessment clinic has been established in the liver clinic at Geelong Hospital to utilise the expertise of nurses to assess and triage new patients and streamline their pathway through the healthcare system. AIM The aim of this study is to assess quantitatively the first 2 years of operation of the nurse assessment clinic at Geelong Hospital, and to assess advantages and disadvantages of the nurse-led clinic. METHODS Data were extracted retrospectively from clinical records of new patients at the liver clinic. Quarterly 1-month periods were recorded over 2 years. Patients were categorised according to the path through which they saw a physician, including missed and rescheduled appointments. The number of appointments, the waiting time from referral to appointments and the number of 'did-not-attend' occasions were analysed before and after the institution of the nurse-led assessment clinic. The Mann-Whitney rank sum test of ordinal data was used to generate median wait times. RESULTS There was shown to be a statistically significant longer waiting time for physician appointment if seen by the nurse first. The difference in waiting time was 10 days. However, there was also a reduction in the number of missed appointments at the subsequent physician clinic. Other advantages have also been identified, including effective triage of patients and organisation of appropriate investigations from the initial nurse assessment.
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Affiliation(s)
- M L Biddle
- School of Medicine, Deakin University, Geelong, Victoria, Australia
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Gillen C, Diamond J, Heath M. The asymmetrical weighting of target eccentricities within a trial block influences antisaccade endpoint bias. J Vis 2014. [DOI: 10.1167/14.10.95] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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14
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Weiler J, Hassall C, Krigolson O, Heath M. Unidirectional switch-costs in oculomotor control are a result of a stimulus-response updating: Evidence from electroencephalography. J Vis 2014. [DOI: 10.1167/14.10.96] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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15
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DeSimone J, Aber G, Heath M. The antisaccade task: Sensory- and motor-related costs to oculomotor planning. J Vis 2014. [DOI: 10.1167/14.10.94] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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16
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Gillen C, Weiler J, Heath M. Target range properties do not influence oculomotor undershooting bias. J Vis 2013. [DOI: 10.1167/13.9.1222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Heath M, Maclean S, Hassall C, Krigolson O. The P300 component and the visuomotor mental rotation task: context-updating scales to angle of rotation. J Vis 2013. [DOI: 10.1167/13.9.352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Holmes S, Marriott K, Mackenzie A, Sin M, Heath M. Distinct visual metrics support the late stages of aperture shaping for 2D and 3D target objects. J Vis 2012. [DOI: 10.1167/12.9.1096] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Heath M, Bell J, Holroyd C, Krigolson O. Behavioural and electrophysiological evidence of visual vector inversion in antipointing. J Vis 2012. [DOI: 10.1167/12.9.1086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Marriott K, Holmes S, Tay J, Heath M. Goal-directed grasping: Visual and haptic percepts of object size influence early but not late aperture shaping. J Vis 2012. [DOI: 10.1167/12.9.1095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Weiler J, Heath M. The prior-antisaccade effect: Decoupling stimulus and response inhibits the planning and control of subsequent prosaccades. J Vis 2012. [DOI: 10.1167/12.9.1253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Heimann R, Heath M. Nurses’ Commitment to Best Practice Infant Care and Family Bonding Founded on Evidence-Based Research: A Journey of Infant Bathing. J Obstet Gynecol Neonatal Nurs 2012. [DOI: 10.1111/j.1552-6909.2012.01360_41.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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Dzingina M, Stegenga H, Heath M, Jones D, Rogers G, Kleijnen J, Wolff R, Armstrong N, Howdle PD. [Assessment and referral after emergency treatment in suspected anaphylactic reaction: summary of the NICE guideline]. Praxis (Bern 1994) 2012; 101:473-476. [PMID: 22454309 DOI: 10.1024/1661-8157/a000892] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Affiliation(s)
- M Dzingina
- National Institute for Health and Clincial Excellence, Piccadilly Plaza, Manchester, Grossbritannien
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Dzingina M, Stegenga H, Heath M, Jones D, Rogers G, Kleijnen J, Wolff R, Armstrong N, Howdle PD. Assessment and referral after emergency treatment of a suspected anaphylactic episode: summary of NICE guidance. BMJ 2011; 343:d7595. [PMID: 22171344 DOI: 10.1136/bmj.d7595] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
- M Dzingina
- National Institute for Health and Clinical Excellence, Piccadilly Plaza, Manchester M1 4BT, UK
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Holmes S, Mulla A, Smuskowitz L, Heath M. Dynamic early adherence and late violation of Weber's law in goal-directed grasping. J Vis 2011. [DOI: 10.1167/11.11.965] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Weiler J, Holmes S, Mulla A, Heath M. Distinct Response Latencies do not Influence Pro- and Antisaccade Trajectories. J Vis 2011. [DOI: 10.1167/11.11.550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Heath M, Weiler J, Marriott K, Welsh T. The antisaccade task: dissociating stimulus and response influences online saccade control. J Vis 2011. [DOI: 10.1167/11.11.549] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Heath EI, Hwang C, Cher ML, Heilbrun LK, Powell I, Menon M, Li J, Heath M, Sethi S, Sarkar FH. A biomarker trial of BR-DIM (BioResponse 3,3’- Diindolylmethane) in patients with prostate cancer who undergo prostatectomy. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.e15185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Colino F, De Grosbois J, Buckingham G, Heath M, Binsted G. Rapid Visuomotor Integration of flanking valenced objects. J Vis 2010. [DOI: 10.1167/10.7.1060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Neely K, Heath M. Visuomotor mental rotation: Reaction time is determined by the complexity of sensorimotor transformations supporting the response. J Vis 2010. [DOI: 10.1167/10.7.1072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Bingley T, Heath M. Digit magnitude does not influence the spatial parameters of goal-directed reaching movements. J Vis 2010. [DOI: 10.1167/10.7.1061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Weiler J, Mulla A, Bingley T, Heath M. Extrinsic manipulations of the mental number line do not impact SNARC-related influences on the planning and control of action. J Vis 2010. [DOI: 10.1167/10.7.1062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Abstract
The authors investigated whether the early or later stages of closed-loop (CL) and open-loop (OL) grasping movements were differentially influenced by the Müller-Lyer (ML) illusion. Participants (N = 21) reached out and grasped small (5 cm) and large (7 cm) objects embedded within fins-in and fins-out ML configurations. Grasping time (GT) was normalized, and absolute grip aperture (GA) as well as scaled illusion effects were computed at 20%, 40%, 60%, and 80% of GT. The results indicated that CL trials were refractory to the illusory array (i.e., from 20% to 80% of GT), whereas OL trials were influenced by the ML figure during that same time. Those findings suggest that CL trials were supported by unitary and metrical visual information, whereas OL trials were entirely supported by perception-based visual information.
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Affiliation(s)
- M Heath
- Department of Kinesiology and Program in Neural Science, Indiana University, Bloomington, IN 47405, USA.
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Heath M, Dunham K, Dryden L. Online and offline trajectories characterize the respective control of pro- and antisaccades. J Vis 2010. [DOI: 10.1167/10.7.509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Binsted G, Brownell K, Heath M. It's all a matter of mass: Both the eye and hand know it. J Vis 2010. [DOI: 10.1167/8.6.58] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Heath M, Neely K, Yakimishyn J, Binsted G. Visuomotor performance and visuomotor memory operate without conscious awareness of intrinsic target features. J Vis 2010. [DOI: 10.1167/8.6.613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Neely K, Heath M. Online action control and the influence of scene-based visual cues. J Vis 2010. [DOI: 10.1167/6.6.921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Heath M, Krigolson O. Visually based movement corrections: Evidence for a lower visual field specialization. J Vis 2010. [DOI: 10.1167/6.6.919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Colino F, De Grosbois J, Buckingham G, Heath M, Binsted G. Distractor valence affects action. J Vis 2010. [DOI: 10.1167/9.8.1104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Heath M, Maraj A, Binsted G. The anti-pointing task: Vector inversion is mediated by a perceptual representation of reaching space. J Vis 2010. [DOI: 10.1167/9.8.1101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Binsted G, deGrosbois J, Krigolson O, Colino F, Heath M. Blurring the boundaries between perception and action. J Vis 2010. [DOI: 10.1167/9.8.1151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Binsted G, Ehresman C, Heath M, Saucier D. Execution generated illusory motor bias: two systems, one representation. J Vis 2010. [DOI: 10.1167/7.9.156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Heath M, Tremblay L, Binsted G. Vision predominates sensorimotor transformations for online grasping control. J Vis 2010. [DOI: 10.1167/7.9.161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Ehresman C, Saucier D, Heath M, Binsted G. Online corrections can produce illusory bias during closed-loop pointing. Exp Brain Res 2008; 188:371-8. [PMID: 18427794 DOI: 10.1007/s00221-008-1367-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2007] [Accepted: 04/01/2008] [Indexed: 10/22/2022]
Abstract
This experiment examined whether the impact of pictorial illusions during the execution of goal-directed reaching movements is attributable to ocular motor signaling. We analyzed eye and hand movements directed toward both the vertex of the Müller-Lyer (ML) figure in a closed-loop procedure. Participants pointed to the right vertex of a visual stimulus in two conditions: a control condition wherein the figure (in-ML, neutral, out-ML) presented at response planning remained unchanged throughout the movement, and an experimental condition wherein a neutral figure presented at response planning was perturbed to an illusory figure (in-ML, out-ML) at movement onset. Consistent with previous work from our group (Heath et al. in Exp Brain Res 158:378-384, 2004; Heath et al. in J Mot Behav 37:179-185, 2005b), action-bias present in both conditions; thus illusory bias was introduced into during online control. Although primary saccades were influenced by illusory configurations (control conditions; see Binsted and Elliott in Hum Mov Sci 18:103-117, 1999a), illusory bias developed within the secondary "corrective" saccades during experimental trials (i.e., following a veridical primary saccade). These results support the position that a unitary spatial representation underlies both action and perception and this representation is common to both the manual and oculomotor systems.
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Affiliation(s)
- C Ehresman
- Canadian Centre for Behavioural Neuroscience, University of Lethbridge, Lethbridge, AB, Canada.
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Abstract
BACKGROUND The study of cerebral specialization in persons with Down syndrome (DS) has revealed an anomalous pattern of organization. Specifically, persons with DS elicit a right cerebral hemisphere lateralization for receptive language and a left cerebral hemisphere lateralization for the production of simple and complex movements: a pattern quite different from the left hemisphere lateralization typically characterizing the aforementioned processes in the non-DS population. It is thought that the putative separation between speech perception and movement planning systems as well as the cost of interhemispheric integration impedes verbal-motor behaviours in persons with DS. Moreover, morphological anomalies of callosal structure may further amplify between-hemisphere communication difficulties in the DS population. In the present investigation, we employed a behavioural technique (i.e. the Poffenberger paradigm; Poffenberger) to determine whether global anomalies of callosal structure further amplify deficits in interhemispheric communication. METHODS Fourteen individuals with DS and 25 chronological age-matched and gender-equated participants without intellectual disability performed a visuomotor reaction time (RT) test with their left or right hand to visual stimuli appearing left or right of visual fixation. Typically it is reported that responses to visual stimuli appearing ipsilateral to the responding hand (i.e. the uncrossed condition) are faster than responses wherein visual stimuli and responding hand are contralaterally mapped (i.e. the crossed condition). The increased RT associated with the crossed condition is reported on the order of 4 ms and has been interpreted to reflect the physiological result of interhemispheric transmission. RESULTS Not surprisingly persons with DS exhibited slower and more variable RTs relative to control counterparts. In addition, a reliable RT advantage favouring the uncrossed conditions was observed among control participants but not persons with DS. CONCLUSIONS In keeping with the extant literature, RT performance of the DS group was slower and more variable than control counterparts. This finding has been interpreted to reflect an 'adaptive reaction' wherein the perceptual-motor abilities of persons with DS are not optimized to respond to externally paced stimuli. In terms of evaluating interhemispheric transmission via the Poffenberger paradigm, our results show the finite measures of explicit brain-behaviour relations characterizing so-called healthy controls are not always tenable in the DS population. Indeed, we believe such a finding underpins the aforementioned 'adaptive reaction' exemplifying preferred movement control in persons with DS.
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Affiliation(s)
- M Heath
- School of Kinesiology, The University of Western Ontario, London, Ontario, Canada.
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Abstract
BACKGROUND Ambulatory pH monitoring is considered the gold standard for measuring oesophageal acid exposure, however, data comparing antimony and glass electrodes are limited. AIM To compare the accuracy of the Slimline antimony pH monitoring system and a conventional glass electrode catheter pH monitoring system during ambulatory conditions. METHODS Eighteen subjects (13 males, 23-45 years) underwent simultaneous pH monitoring using the Slimline antimony pH electrode and MIC M3 glass pH electrode pH monitoring systems for 12 h. Acid exposure was analysed and compared by manual extraction of the data onto an excel spreadsheet. RESULTS There was no statistical difference in the median per cent time the pH was <4 recorded by the two systems (Slimline, 3%, Glass MIC M3, 2%, P = 0.77) and the correlation was excellent (r = 0.84). The difference in recorded reflux events was also not significantly different between the two systems, with the absolute difference being 23 events (s.d., 26). Point-by-point discrepancy was 28% (s.d., 18%), however, the agreement in terms of reflex events was excellent (Kappa value, 0.89, s.d., 0.09). CONCLUSION Despite substantial point-by-point disagreement, the antimony Slimline pH catheter compares favourably to the Glass MIC M3 pH catheter in terms of measuring standard pH parameters.
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Affiliation(s)
- J E Pandolfino
- Department of Medicine, Northwestern University, The Feinberg School of Medicine, Chicago, IL 60611, USA.
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Wasan KM, Goss PE, Pritchard PH, Shepherd L, Palmer MJ, Liu S, Tu D, Ingle JN, Heath M, Deangelis D, Perez EA. The influence of letrozole on serum lipid concentrations in postmenopausal women with primary breast cancer who have completed 5 years of adjuvant tamoxifen (NCIC CTG MA.17L). Ann Oncol 2005; 16:707-15. [PMID: 15817595 DOI: 10.1093/annonc/mdi158] [Citation(s) in RCA: 145] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND The purpose of this study was to evaluate changes in serum lipid parameters {cholesterol, high-density lipoprotein (HDL) cholesterol, low-density lipoprotein (LDL) cholesterol, triglycerides and lipoprotein(a) [Lp(a)]}, in postmenopausal women receiving letrozole or placebo after adjuvant tamoxifen for early stage breast cancer (NCIC CTG MA.17L). PATIENTS AND METHODS MA.17L is a substudy of MA.17, a randomized, double-blind, placebo-controlled trial of letrozole 2.5 mg taken daily for 5 years in postmenopausal women with primary breast cancer completing approximately 5 years of prior adjuvant tamoxifen. Patients consenting to participate in this companion study had blood drawn and lipid parameters (total cholesterol, HDL cholesterol, LDL cholesterol, Lp(a), triglycerides) evaluated at baseline, 6 months, 12 months and yearly thereafter until completion of protocol therapy. It was required that women be non-hyperlipidemic and not taking lipid-lowering drugs at time of entry on this trial. RESULTS Three hundred and forty seven women were enrolled in the study. The letrozole and the placebo groups demonstrated marginally significant differences in the percentage change from baseline in HDL cholesterol at 6 months (P=0.049), in LDL cholesterol at 12 months (P=0.033) and triglycerides at 24 months (P=0.036). All comparisons of lipid parameters at other time points were not significantly different between the two treatment groups. No statistically significant differences in the number of patients exceeding the thresholds defined for the lipid parameters were found between the two treatment groups. CONCLUSIONS The MA.17 trial demonstrated a significant improvement in disease-free survival with the use of letrozole as extended adjuvant therapy post tamoxifen. Results from this study suggests that letrozole does not significantly alter serum cholesterol, HDL cholesterol, LDL cholesterol, triglycerides or Lp(a) in non-hyperlidiemic postmenopausal women with primary breast cancer treated up to 36 months following at least 5 years of adjuvant tamoxifen therapy. These findings further support the tolerability of extended adjuvant letrozole in postmenopausal women following standard tamoxifen therapy.
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Affiliation(s)
- K M Wasan
- Division of Pharmaceutics and Biopharmaceutics, Faculty of Pharmaceutical Sciences, The University of British Columbia, Vancouver, BC, Canada.
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Abstract
Cacao (Theobroma cacao L.) has been cultivated in Central America since pre-Columbian times. The type of cacao cultivated in this region was called Criollo; cacao populations from the Amazon basin were called Forastero. The type of Forastero most commonly cultivated until 1950 was named Amelonado. Historical data show Trinitario cacao to have originated in Trinidad, resulting from natural hybridisation between Criollo and Amelonado Forastero. Doubts persist on the source of the Amelonado Forastero involved in the origin of Trinitario; the Amelonado parent may have come from the Lower Amazon, the Orinoco or the Guyanas. Most of the cacao cultivated worldwide until 1950 consisted of Criollo, Trinitario and Amelonado. From the early 1950s, Forastero material collected in the Upper Amazon region during the 1930s and 1940s began to be employed in breeding programmes. To gain a better understanding of the origin and the genetic basis of the cacao cultivars exploited before the utilisation of germplasm collected in the Upper Amazon, a study was carried out using restriction fragment length polymorphism and microsatellite markers. Trinitario samples from 17 countries were analysed. With molecular markers, it was possible to clearly identify three main genotypes (represented by clones SP1, MAT1-6 and SIAL70) implicated in the origin of most Trinitario clones.
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Affiliation(s)
- J C Motamayor
- CIRAD, Centre de Coopération Internationale en Recherche Agronomique pour le Développement, TA 40/03, Av. Agropolis, 34398 Montpellier cedex 5, France.
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