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Maxwell JR, DiDomenico J, Roberts MH, Marquez LE, Rai R, Weinberg J, Jacobson SW, Stephen J, Bakhireva LN. Impact of low-level prenatal alcohol exposure and maternal stress on autonomic regulation. Pediatr Res 2024; 95:350-358. [PMID: 37674025 DOI: 10.1038/s41390-023-02799-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 06/07/2023] [Accepted: 08/09/2023] [Indexed: 09/08/2023]
Abstract
BACKGROUND Prenatal alcohol exposure (PAE) impacts the neurodevelopment of the fetus, including the infant's ability to self-regulate. Heart rate variability (HRV), that is, the beat-to-beat variability in heart rate, is a non-invasive measurement that can indicate autonomic nervous system (ANS) function/dysfunction. METHODS The study consisted of a subset of our ENRICH-2 cohort: 80 participants (32 PAE and 48 Controls) who had completed three visits during pregnancy. The participants completed a comprehensive assessment of PAE and other substances throughout pregnancy and assessments for stress, anxiety, and depression in the third trimester. At 24 h of age, infant HRV was assessed in the hospital during the clinically indicated heel lance; 3- to 5-min HRV epochs were obtained during baseline, heel lancing, and recovery episodes. RESULTS Parameters of HRV differed in infants with PAE compared to Controls during the recovery phase of the heel lance (respiratory sinus arrhythmia (RSA) and high-frequency (HF), p < 0.05). Increased maternal stress was also strongly associated with abnormalities in RSA, HF, and low-frequency / high-frequency (LF/HF, p's < 0.05). CONCLUSIONS Alterations in ANS regulation associated with PAE and maternal stress may reflect abnormal development of the hypothalamic-pituitary-adrenal axis and have long term implications for infant responsiveness and self-regulation. IMPACT Previous studies have focused on effects of moderate to heavy prenatal alcohol exposure (PAE) on autonomic dysregulation, but little is known about the effects of lower levels of PAE on infant self-regulation and heart rate variability (HRV). Prenatal stress is another risk factor for autonomic dysregulation. Mild PAE impacts infant self-regulation, which can be assessed using HRV. However, the effect of prenatal stress is stronger than that of mild PAE or other mental health variables on autonomic dysregulation.
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Affiliation(s)
- Jessie R Maxwell
- Department of Pediatrics, University of New Mexico, Albuquerque, NM, Mexico.
- Department of Neurosciences, University of New Mexico, Albuquerque, NM, Mexico.
| | - Jared DiDomenico
- Substance Use Research and Education (SURE) Center, College of Pharmacy, University of New Mexico, Albuquerque, NM, Mexico
| | - Melissa H Roberts
- Substance Use Research and Education (SURE) Center, College of Pharmacy, University of New Mexico, Albuquerque, NM, Mexico
| | - Lidia Enriquez Marquez
- Substance Use Research and Education (SURE) Center, College of Pharmacy, University of New Mexico, Albuquerque, NM, Mexico
| | - Rajani Rai
- Substance Use Research and Education (SURE) Center, College of Pharmacy, University of New Mexico, Albuquerque, NM, Mexico
| | - Joanne Weinberg
- Department of Cellular & Physiological Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Sandra W Jacobson
- Department of Psychiatry and Behavioral Neurosciences, Wayne State University School of Medicine, Detroit, MI, USA
| | - Julia Stephen
- The Mind Research Network, a Division of Lovelace Biomedical Research Institute, University of New Mexico, Albuquerque, NM, Mexico
| | - Ludmila N Bakhireva
- Substance Use Research and Education (SURE) Center, College of Pharmacy, University of New Mexico, Albuquerque, NM, Mexico
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Swieter E, Gross JM, Stephen J, Watterberg K, Maxwell JR. Pilot study shows skin-to-skin care with parents improves heart rate variability in preterm infants in the neonatal intensive care unit. Front Pediatr 2023; 11:1269405. [PMID: 37790693 PMCID: PMC10544889 DOI: 10.3389/fped.2023.1269405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/29/2023] [Accepted: 09/01/2023] [Indexed: 10/05/2023] Open
Abstract
Background Skin-to-skin care in the newborn intensive care unit typically lasts for short periods of time and enhances breastfeeding, attachment, and parental self-esteem. Heart rate variability (HRV) increases with gestational age and is a measure of maturation of parasympathetic vs. sympathetic autonomic nervous system activity. HRV measurements may be useful in capturing changes in autonomic regulation in response to skin-to-skin care. Objective To analyze the effects of skin-to-skin care on HRV in preterm infants receiving respiratory support. We hypothesized that skin-to-skin care would result in a more mature pattern of parasympathetic activity. Methods In this prospective crossover study, infants <30 weeks' gestation and 1-6 weeks postnatal age had HRV recorded for 30 min before, during, and after skin-to-skin care sessions. HRV characteristics analyzed included the standard deviation of the normal-to-normal interval (SDNN), the root mean squared of successive differences of normal-to-normal intervals (RMSSD), and the standard deviation of decelerations (SDDec). Results 10 infants between 25 5/7-29 6/7 weeks gestational age and 7-41 days postnatal age completed 22 sessions while receiving respiratory support (positive pressure ventilation or nasal cannula oxygen). Two measures of HRV (SDNN and RMSSD) were significantly decreased by the end of the skin-to-skin sessions, compared to pre-session values. SDNN decreased from a median of 10.44 ms before the session to 6.70 ms after being placed back in bed (p < 0.05), with RMSSD decreasing from a median of 6.80 ms before the session to 4.32 ms while being held at the end of 30 min (p < 0.05). Discussion Skin-to-skin care with a parent resulted in a more mature autonomic nervous system pattern in preterm infants receiving respiratory support, suggesting physiologic benefit for the infant. No adverse events were seen during any session.
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Affiliation(s)
- Erin Swieter
- Department of Pediatrics, University of New Mexico, Albuquerque, NM, United States
| | - Jessica M. Gross
- Clinical and Translational Science Center, University of New Mexico, Albuquerque, NM, United States
| | - Julia Stephen
- The Mind Research Network a Division of Lovelace Biomedical Research Institute, Albuquerque, NM, United States
| | - Kristi Watterberg
- Department of Pediatrics, University of New Mexico, Albuquerque, NM, United States
| | - Jessie R. Maxwell
- Department of Pediatrics, University of New Mexico, Albuquerque, NM, United States
- Department of Neurosciences, University of New Mexico, Albuquerque, NM, United States
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Nurminen J, Zhdanov A, Yeo WJ, Iivanainen J, Stephen J, Borna A, McKay J, Schwindt PDD, Taulu S. The effect of spatial sampling on the resolution of the magnetostatic inverse problem. ArXiv 2023:arXiv:2305.19909v1. [PMID: 37396603 PMCID: PMC10312811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Grants] [Subscribe] [Scholar Register] [Indexed: 07/04/2023]
Abstract
In magnetoencephalography, linear minimum norm inverse methods are commonly employed when a solution with minimal a priori assumptions is desirable. These methods typically produce spatially extended inverse solutions, even when the generating source is focal. Various reasons have been proposed for this effect, including intrisic properties of the minimum norm solution, effects of regularization, noise, and limitations of the sensor array. In this work, we express the lead field in terms of the magnetostatic multipole expansion and develop the minimum-norm inverse in the multipole domain. We demonstrate the close relationship between numerical regularization and explicit suppression of spatial frequencies of the magnetic field. We show that the spatial sampling capabilities of the sensor array and regularization together determine the resolution of the inverse solution. For the purposes of stabilizing the inverse estimate, we propose the multipole transformation of the lead field as an alternative or complementary means to purely numerical regularization.
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Yeo WJ, Larson E, Iivanainen J, Borna A, McKay J, Stephen J, Schwindt PDD, Taulu S. Effects of head modeling errors on the spatial frequency representation of MEG. Phys Med Biol 2023; 68. [PMID: 37040782 DOI: 10.1088/1361-6560/accc06] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 10/13/2022] [Accepted: 04/11/2023] [Indexed: 04/13/2023]
Abstract
OBJECTIVES We aim to investigate the effects of head model inaccuracies on signal and source reconstruction accuracies for various sensor array distances to the head. This allows for the assessment of the importance of head modeling for next-generation magnetoencephalography (MEG) sensors, optically-pumped magnetometers (OPM). APPROACH A 1-shell boundary element method (BEM) spherical head model with 642 vertices was defined. The vertices were randomly perturbed radially up to 2% - 10% of the radius, and the forward signal was calculated for dipolar sources located at 2 cm to 8 cm from the center of the sphere with a 324 sensor array located at 10 cm to 15 cm from the center of the sphere. Source localization was performed for each of these forward signals. The signal for each perturbed spherical head case was analyzed in the spatial frequency domain, and the signal and source localization errors were quantified relative to the unperturbed case. MAIN RESULTS In the noiseless and high signal-to-noise ratio (SNR) case of approximately >= 6 dB, inaccuracies in our spherical BEM head model led to increased signal and source localization inaccuracies when sensor arrays were closer to the head, especially for deep and superficial sources. In the noisy case however, the higher SNR for closer sensor arrays led to an improved ECD fit and outweighed the effects of head geometry inaccuracies. SIGNIFICANCE OPMs may be placed directly on the head, as opposed to the more commonly used superconducting quantum interference device (SQUID) sensors which must be placed a few centimeters away from the head. OPMs thus allow for signals of higher spatial resolution to be captured, resulting in potentially more accurate source localizations. Our results suggest that an increased emphasis on accurate head modeling for OPMs may be necessary to fully realize its improved source localization potential.
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Affiliation(s)
- Wan-Jin Yeo
- Physics, University of Washington, 3910 15th Ave NE, Seattle, 98195-0005, UNITED STATES
| | - Eric Larson
- University of Washington Institute for Learning and Brain Sciences, Portage Bay Building, 1715 NE Columbia Rd, Seattle, Washington, 98195-7988, UNITED STATES
| | - Joonas Iivanainen
- Sandia National Laboratories, 1515 Eubank SE, Albuquerque, New Mexico, 87185-5820, UNITED STATES
| | - Amir Borna
- Physics Based Microsystems, Sandia National Laboratories, 1515 Eubank SE, Albuquerque, New Mexico, 87185-5820, UNITED STATES
| | - Jim McKay
- Candoo Systems Inc., 2991 Thacker Ave, Coquitlam, British Columbia, V3C 4N6, CANADA
| | - Julia Stephen
- Mind Research Network, 1101 Yale Blvd. NE, Albuquerque, New Mexico, 87106-3834, UNITED STATES
| | - Peter D D Schwindt
- Physics Based Microsystems, Sandia National Laboratories, 1515 Eubank SE, Albuquerque, New Mexico, 87185-5820, UNITED STATES
| | - Samu Taulu
- University of Washington, 3910 15th Ave NE, Seattle, 98195-0005, UNITED STATES
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Aprile E, Abe K, Agostini F, Ahmed Maouloud S, Althueser L, Andrieu B, Angelino E, Angevaare JR, Antochi VC, Antón Martin D, Arneodo F, Baudis L, Baxter AL, Bellagamba L, Biondi R, Bismark A, Brown A, Bruenner S, Bruno G, Budnik R, Bui TK, Cai C, Capelli C, Cardoso JMR, Cichon D, Clark M, Colijn AP, Conrad J, Cuenca-García JJ, Cussonneau JP, D'Andrea V, Decowski MP, Di Gangi P, Di Pede S, Di Giovanni A, Di Stefano R, Diglio S, Eitel K, Elykov A, Farrell S, Ferella AD, Ferrari C, Fischer H, Fulgione W, Gaemers P, Gaior R, Gallo Rosso A, Galloway M, Gao F, Gardner R, Glade-Beucke R, Grandi L, Grigat J, Guida M, Hammann R, Higuera A, Hils C, Hoetzsch L, Howlett J, Iacovacci M, Itow Y, Jakob J, Joerg F, Joy A, Kato N, Kara M, Kavrigin P, Kazama S, Kobayashi M, Koltman G, Kopec A, Kuger F, Landsman H, Lang RF, Levinson L, Li I, Li S, Liang S, Lindemann S, Lindner M, Liu K, Loizeau J, Lombardi F, Long J, Lopes JAM, Ma Y, Macolino C, Mahlstedt J, Mancuso A, Manenti L, Marignetti F, Marrodán Undagoitia T, Martens K, Masbou J, Masson D, Masson E, Mastroianni S, Messina M, Miuchi K, Mizukoshi K, Molinario A, Moriyama S, Morå K, Mosbacher Y, Murra M, Müller J, Ni K, Oberlack U, Paetsch B, Palacio J, Paschos P, Peres R, Peters C, Pienaar J, Pierre M, Pizzella V, Plante G, Qi J, Qin J, Ramírez García D, Reichard S, Rocchetti A, Rupp N, Sanchez L, Dos Santos JMF, Sarnoff I, Sartorelli G, Schreiner J, Schulte D, Schulte P, Schulze Eißing H, Schumann M, Scotto Lavina L, Selvi M, Semeria F, Shagin P, Shi S, Shockley E, Silva M, Simgen H, Stephen J, Takeda A, Tan PL, Terliuk A, Thers D, Toschi F, Trinchero G, Tunnell C, Tönnies F, Valerius K, Volta G, Wei Y, Weinheimer C, Weiss M, Wenz D, Wittweg C, Wolf T, Xu D, Xu Z, Yamashita M, Yang L, Ye J, Yuan L, Zavattini G, Zhong M, Zhu T. Search for New Physics in Electronic Recoil Data from XENONnT. Phys Rev Lett 2022; 129:161805. [PMID: 36306777 DOI: 10.1103/physrevlett.129.161805] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Accepted: 09/21/2022] [Indexed: 06/16/2023]
Abstract
We report on a blinded analysis of low-energy electronic recoil data from the first science run of the XENONnT dark matter experiment. Novel subsystems and the increased 5.9 ton liquid xenon target reduced the background in the (1, 30) keV search region to (15.8±1.3) events/(ton×year×keV), the lowest ever achieved in a dark matter detector and ∼5 times lower than in XENON1T. With an exposure of 1.16 ton-years, we observe no excess above background and set stringent new limits on solar axions, an enhanced neutrino magnetic moment, and bosonic dark matter.
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Affiliation(s)
- E Aprile
- Physics Department, Columbia University, New York, New York 10027, USA
| | - K Abe
- Kamioka Observatory, Institute for Cosmic Ray Research, and Kavli Institute for the Physics and Mathematics of the Universe (WPI), University of Tokyo, Higashi-Mozumi, Kamioka, Hida, Gifu 506-1205, Japan
| | - F Agostini
- Department of Physics and Astronomy, University of Bologna and INFN-Bologna, 40126 Bologna, Italy
| | | | - L Althueser
- Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, 48149 Münster, Germany
| | - B Andrieu
- LPNHE, Sorbonne Université, CNRS/IN2P3, 75005 Paris, France
| | - E Angelino
- INAF-Astrophysical Observatory of Torino, Department of Physics, University of Torino and INFN-Torino, 10125 Torino, Italy
| | - J R Angevaare
- Nikhef and the University of Amsterdam, Science Park, 1098XG Amsterdam, Netherlands
| | - V C Antochi
- Oskar Klein Centre, Department of Physics, Stockholm University, AlbaNova, Stockholm SE-10691, Sweden
| | - D Antón Martin
- Department of Physics and Kavli Institute for Cosmological Physics, University of Chicago, Chicago, Illinois 60637, USA
| | - F Arneodo
- New York University Abu Dhabi-Center for Astro, Particle and Planetary Physics, Abu Dhabi, United Arab Emirates
| | - L Baudis
- Physik-Institut, University of Zürich, 8057 Zürich, Switzerland
| | - A L Baxter
- Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, USA
| | - L Bellagamba
- Department of Physics and Astronomy, University of Bologna and INFN-Bologna, 40126 Bologna, Italy
| | - R Biondi
- INFN-Laboratori Nazionali del Gran Sasso and Gran Sasso Science Institute, 67100 L'Aquila, Italy
| | - A Bismark
- Physik-Institut, University of Zürich, 8057 Zürich, Switzerland
| | - A Brown
- Physikalisches Institut, Universität Freiburg, 79104 Freiburg, Germany
| | - S Bruenner
- Nikhef and the University of Amsterdam, Science Park, 1098XG Amsterdam, Netherlands
| | - G Bruno
- SUBATECH, IMT Atlantique, CNRS/IN2P3, Nantes Université, Nantes 44307, France
| | - R Budnik
- Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - T K Bui
- Kamioka Observatory, Institute for Cosmic Ray Research, and Kavli Institute for the Physics and Mathematics of the Universe (WPI), University of Tokyo, Higashi-Mozumi, Kamioka, Hida, Gifu 506-1205, Japan
| | - C Cai
- Department of Physics and Center for High Energy Physics, Tsinghua University, Beijing 100084, China
| | - C Capelli
- Physik-Institut, University of Zürich, 8057 Zürich, Switzerland
| | - J M R Cardoso
- LIBPhys, Department of Physics, University of Coimbra, 3004-516 Coimbra, Portugal
| | - D Cichon
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - M Clark
- Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, USA
| | - A P Colijn
- Nikhef and the University of Amsterdam, Science Park, 1098XG Amsterdam, Netherlands
| | - J Conrad
- Oskar Klein Centre, Department of Physics, Stockholm University, AlbaNova, Stockholm SE-10691, Sweden
| | - J J Cuenca-García
- Physik-Institut, University of Zürich, 8057 Zürich, Switzerland
- Institute for Astroparticle Physics, Karlsruhe Institute of Technology, 76021 Karlsruhe, Germany
| | - J P Cussonneau
- SUBATECH, IMT Atlantique, CNRS/IN2P3, Nantes Université, Nantes 44307, France
| | - V D'Andrea
- INFN-Laboratori Nazionali del Gran Sasso and Gran Sasso Science Institute, 67100 L'Aquila, Italy
- Physikalisches Institut, Universität Freiburg, 79104 Freiburg, Germany
- Department of Physics and Chemistry, University of L'Aquila, 67100 L'Aquila, Italy
| | - M P Decowski
- Nikhef and the University of Amsterdam, Science Park, 1098XG Amsterdam, Netherlands
| | - P Di Gangi
- Department of Physics and Astronomy, University of Bologna and INFN-Bologna, 40126 Bologna, Italy
| | - S Di Pede
- Nikhef and the University of Amsterdam, Science Park, 1098XG Amsterdam, Netherlands
| | - A Di Giovanni
- New York University Abu Dhabi-Center for Astro, Particle and Planetary Physics, Abu Dhabi, United Arab Emirates
| | - R Di Stefano
- Department of Physics "Ettore Pancini," University of Napoli and INFN-Napoli, 80126 Napoli, Italy
| | - S Diglio
- SUBATECH, IMT Atlantique, CNRS/IN2P3, Nantes Université, Nantes 44307, France
| | - K Eitel
- Institute for Astroparticle Physics, Karlsruhe Institute of Technology, 76021 Karlsruhe, Germany
| | - A Elykov
- Physikalisches Institut, Universität Freiburg, 79104 Freiburg, Germany
| | - S Farrell
- Department of Physics and Astronomy, Rice University, Houston, Texas 77005, USA
| | - A D Ferella
- INFN-Laboratori Nazionali del Gran Sasso and Gran Sasso Science Institute, 67100 L'Aquila, Italy
- Department of Physics and Chemistry, University of L'Aquila, 67100 L'Aquila, Italy
| | - C Ferrari
- INFN-Laboratori Nazionali del Gran Sasso and Gran Sasso Science Institute, 67100 L'Aquila, Italy
| | - H Fischer
- Physikalisches Institut, Universität Freiburg, 79104 Freiburg, Germany
| | - W Fulgione
- INAF-Astrophysical Observatory of Torino, Department of Physics, University of Torino and INFN-Torino, 10125 Torino, Italy
- INFN-Laboratori Nazionali del Gran Sasso and Gran Sasso Science Institute, 67100 L'Aquila, Italy
| | - P Gaemers
- Nikhef and the University of Amsterdam, Science Park, 1098XG Amsterdam, Netherlands
| | - R Gaior
- LPNHE, Sorbonne Université, CNRS/IN2P3, 75005 Paris, France
| | - A Gallo Rosso
- Oskar Klein Centre, Department of Physics, Stockholm University, AlbaNova, Stockholm SE-10691, Sweden
| | - M Galloway
- Physik-Institut, University of Zürich, 8057 Zürich, Switzerland
| | - F Gao
- Department of Physics and Center for High Energy Physics, Tsinghua University, Beijing 100084, China
| | - R Gardner
- Department of Physics and Kavli Institute for Cosmological Physics, University of Chicago, Chicago, Illinois 60637, USA
| | - R Glade-Beucke
- Physikalisches Institut, Universität Freiburg, 79104 Freiburg, Germany
| | - L Grandi
- Department of Physics and Kavli Institute for Cosmological Physics, University of Chicago, Chicago, Illinois 60637, USA
| | - J Grigat
- Physikalisches Institut, Universität Freiburg, 79104 Freiburg, Germany
| | - M Guida
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - R Hammann
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - A Higuera
- Department of Physics and Astronomy, Rice University, Houston, Texas 77005, USA
| | - C Hils
- Institut für Physik & Exzellenzcluster PRISMA+, Johannes Gutenberg-Universität Mainz, 55099 Mainz, Germany
| | - L Hoetzsch
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - J Howlett
- Physics Department, Columbia University, New York, New York 10027, USA
| | - M Iacovacci
- Department of Physics "Ettore Pancini," University of Napoli and INFN-Napoli, 80126 Napoli, Italy
| | - Y Itow
- Kobayashi-Maskawa Institute for the Origin of Particles and the Universe, and Institute for Space-Earth Environmental Research, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602, Japan
| | - J Jakob
- Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, 48149 Münster, Germany
| | - F Joerg
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - A Joy
- Oskar Klein Centre, Department of Physics, Stockholm University, AlbaNova, Stockholm SE-10691, Sweden
| | - N Kato
- Kamioka Observatory, Institute for Cosmic Ray Research, and Kavli Institute for the Physics and Mathematics of the Universe (WPI), University of Tokyo, Higashi-Mozumi, Kamioka, Hida, Gifu 506-1205, Japan
| | - M Kara
- Institute for Astroparticle Physics, Karlsruhe Institute of Technology, 76021 Karlsruhe, Germany
| | - P Kavrigin
- Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - S Kazama
- Kobayashi-Maskawa Institute for the Origin of Particles and the Universe, and Institute for Space-Earth Environmental Research, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602, Japan
| | - M Kobayashi
- Kobayashi-Maskawa Institute for the Origin of Particles and the Universe, and Institute for Space-Earth Environmental Research, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602, Japan
| | - G Koltman
- Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - A Kopec
- Department of Physics, University of California San Diego, La Jolla, California 92093, USA
| | - F Kuger
- Physikalisches Institut, Universität Freiburg, 79104 Freiburg, Germany
| | - H Landsman
- Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - R F Lang
- Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, USA
| | - L Levinson
- Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - I Li
- Department of Physics and Astronomy, Rice University, Houston, Texas 77005, USA
| | - S Li
- Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, USA
| | - S Liang
- Department of Physics and Astronomy, Rice University, Houston, Texas 77005, USA
| | - S Lindemann
- Physikalisches Institut, Universität Freiburg, 79104 Freiburg, Germany
| | - M Lindner
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - K Liu
- Department of Physics and Center for High Energy Physics, Tsinghua University, Beijing 100084, China
| | - J Loizeau
- SUBATECH, IMT Atlantique, CNRS/IN2P3, Nantes Université, Nantes 44307, France
| | - F Lombardi
- Institut für Physik & Exzellenzcluster PRISMA+, Johannes Gutenberg-Universität Mainz, 55099 Mainz, Germany
| | - J Long
- Department of Physics and Kavli Institute for Cosmological Physics, University of Chicago, Chicago, Illinois 60637, USA
| | - J A M Lopes
- LIBPhys, Department of Physics, University of Coimbra, 3004-516 Coimbra, Portugal
| | - Y Ma
- Department of Physics, University of California San Diego, La Jolla, California 92093, USA
| | - C Macolino
- INFN-Laboratori Nazionali del Gran Sasso and Gran Sasso Science Institute, 67100 L'Aquila, Italy
- Department of Physics and Chemistry, University of L'Aquila, 67100 L'Aquila, Italy
| | - J Mahlstedt
- Oskar Klein Centre, Department of Physics, Stockholm University, AlbaNova, Stockholm SE-10691, Sweden
| | - A Mancuso
- Department of Physics and Astronomy, University of Bologna and INFN-Bologna, 40126 Bologna, Italy
| | - L Manenti
- New York University Abu Dhabi-Center for Astro, Particle and Planetary Physics, Abu Dhabi, United Arab Emirates
| | - F Marignetti
- Department of Physics "Ettore Pancini," University of Napoli and INFN-Napoli, 80126 Napoli, Italy
| | | | - K Martens
- Kamioka Observatory, Institute for Cosmic Ray Research, and Kavli Institute for the Physics and Mathematics of the Universe (WPI), University of Tokyo, Higashi-Mozumi, Kamioka, Hida, Gifu 506-1205, Japan
| | - J Masbou
- SUBATECH, IMT Atlantique, CNRS/IN2P3, Nantes Université, Nantes 44307, France
| | - D Masson
- Physikalisches Institut, Universität Freiburg, 79104 Freiburg, Germany
| | - E Masson
- LPNHE, Sorbonne Université, CNRS/IN2P3, 75005 Paris, France
| | - S Mastroianni
- Department of Physics "Ettore Pancini," University of Napoli and INFN-Napoli, 80126 Napoli, Italy
| | - M Messina
- INFN-Laboratori Nazionali del Gran Sasso and Gran Sasso Science Institute, 67100 L'Aquila, Italy
| | - K Miuchi
- Department of Physics, Kobe University, Kobe, Hyogo 657-8501, Japan
| | - K Mizukoshi
- Department of Physics, Kobe University, Kobe, Hyogo 657-8501, Japan
| | - A Molinario
- INAF-Astrophysical Observatory of Torino, Department of Physics, University of Torino and INFN-Torino, 10125 Torino, Italy
| | - S Moriyama
- Kamioka Observatory, Institute for Cosmic Ray Research, and Kavli Institute for the Physics and Mathematics of the Universe (WPI), University of Tokyo, Higashi-Mozumi, Kamioka, Hida, Gifu 506-1205, Japan
| | - K Morå
- Physics Department, Columbia University, New York, New York 10027, USA
| | - Y Mosbacher
- Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - M Murra
- Physics Department, Columbia University, New York, New York 10027, USA
| | - J Müller
- Physikalisches Institut, Universität Freiburg, 79104 Freiburg, Germany
| | - K Ni
- Department of Physics, University of California San Diego, La Jolla, California 92093, USA
| | - U Oberlack
- Institut für Physik & Exzellenzcluster PRISMA+, Johannes Gutenberg-Universität Mainz, 55099 Mainz, Germany
| | - B Paetsch
- Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - J Palacio
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - P Paschos
- Department of Physics and Kavli Institute for Cosmological Physics, University of Chicago, Chicago, Illinois 60637, USA
| | - R Peres
- Physik-Institut, University of Zürich, 8057 Zürich, Switzerland
| | - C Peters
- Department of Physics and Astronomy, Rice University, Houston, Texas 77005, USA
| | - J Pienaar
- Department of Physics and Kavli Institute for Cosmological Physics, University of Chicago, Chicago, Illinois 60637, USA
| | - M Pierre
- SUBATECH, IMT Atlantique, CNRS/IN2P3, Nantes Université, Nantes 44307, France
| | - V Pizzella
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - G Plante
- Physics Department, Columbia University, New York, New York 10027, USA
| | - J Qi
- Department of Physics, University of California San Diego, La Jolla, California 92093, USA
| | - J Qin
- Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, USA
| | | | - S Reichard
- Institute for Astroparticle Physics, Karlsruhe Institute of Technology, 76021 Karlsruhe, Germany
| | - A Rocchetti
- Physikalisches Institut, Universität Freiburg, 79104 Freiburg, Germany
| | - N Rupp
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - L Sanchez
- Department of Physics and Astronomy, Rice University, Houston, Texas 77005, USA
| | - J M F Dos Santos
- LIBPhys, Department of Physics, University of Coimbra, 3004-516 Coimbra, Portugal
| | - I Sarnoff
- New York University Abu Dhabi-Center for Astro, Particle and Planetary Physics, Abu Dhabi, United Arab Emirates
| | - G Sartorelli
- Department of Physics and Astronomy, University of Bologna and INFN-Bologna, 40126 Bologna, Italy
| | - J Schreiner
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - D Schulte
- Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, 48149 Münster, Germany
| | - P Schulte
- Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, 48149 Münster, Germany
| | - H Schulze Eißing
- Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, 48149 Münster, Germany
| | - M Schumann
- Physikalisches Institut, Universität Freiburg, 79104 Freiburg, Germany
| | | | - M Selvi
- Department of Physics and Astronomy, University of Bologna and INFN-Bologna, 40126 Bologna, Italy
| | - F Semeria
- Department of Physics and Astronomy, University of Bologna and INFN-Bologna, 40126 Bologna, Italy
| | - P Shagin
- Institut für Physik & Exzellenzcluster PRISMA+, Johannes Gutenberg-Universität Mainz, 55099 Mainz, Germany
| | - S Shi
- Physics Department, Columbia University, New York, New York 10027, USA
| | - E Shockley
- Department of Physics, University of California San Diego, La Jolla, California 92093, USA
| | - M Silva
- LIBPhys, Department of Physics, University of Coimbra, 3004-516 Coimbra, Portugal
| | - H Simgen
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - J Stephen
- Department of Physics and Kavli Institute for Cosmological Physics, University of Chicago, Chicago, Illinois 60637, USA
| | - A Takeda
- Kamioka Observatory, Institute for Cosmic Ray Research, and Kavli Institute for the Physics and Mathematics of the Universe (WPI), University of Tokyo, Higashi-Mozumi, Kamioka, Hida, Gifu 506-1205, Japan
| | - P-L Tan
- Oskar Klein Centre, Department of Physics, Stockholm University, AlbaNova, Stockholm SE-10691, Sweden
| | - A Terliuk
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - D Thers
- SUBATECH, IMT Atlantique, CNRS/IN2P3, Nantes Université, Nantes 44307, France
| | - F Toschi
- Physikalisches Institut, Universität Freiburg, 79104 Freiburg, Germany
| | - G Trinchero
- INAF-Astrophysical Observatory of Torino, Department of Physics, University of Torino and INFN-Torino, 10125 Torino, Italy
| | - C Tunnell
- Department of Physics and Astronomy, Rice University, Houston, Texas 77005, USA
| | - F Tönnies
- Physikalisches Institut, Universität Freiburg, 79104 Freiburg, Germany
| | - K Valerius
- Institute for Astroparticle Physics, Karlsruhe Institute of Technology, 76021 Karlsruhe, Germany
| | - G Volta
- Physik-Institut, University of Zürich, 8057 Zürich, Switzerland
| | - Y Wei
- Department of Physics, University of California San Diego, La Jolla, California 92093, USA
| | - C Weinheimer
- Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, 48149 Münster, Germany
| | - M Weiss
- Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - D Wenz
- Institut für Physik & Exzellenzcluster PRISMA+, Johannes Gutenberg-Universität Mainz, 55099 Mainz, Germany
| | - C Wittweg
- Physik-Institut, University of Zürich, 8057 Zürich, Switzerland
| | - T Wolf
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - D Xu
- Department of Physics and Center for High Energy Physics, Tsinghua University, Beijing 100084, China
| | - Z Xu
- Physics Department, Columbia University, New York, New York 10027, USA
| | - M Yamashita
- Kamioka Observatory, Institute for Cosmic Ray Research, and Kavli Institute for the Physics and Mathematics of the Universe (WPI), University of Tokyo, Higashi-Mozumi, Kamioka, Hida, Gifu 506-1205, Japan
| | - L Yang
- Department of Physics, University of California San Diego, La Jolla, California 92093, USA
| | - J Ye
- Physics Department, Columbia University, New York, New York 10027, USA
| | - L Yuan
- Department of Physics and Kavli Institute for Cosmological Physics, University of Chicago, Chicago, Illinois 60637, USA
| | - G Zavattini
- Department of Physics and Astronomy, University of Bologna and INFN-Bologna, 40126 Bologna, Italy
| | - M Zhong
- Department of Physics, University of California San Diego, La Jolla, California 92093, USA
| | - T Zhu
- Physics Department, Columbia University, New York, New York 10027, USA
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6
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Badura Brack AS, Marklin M, Embury CM, Picci G, Frenzel M, Klanecky Earl A, Stephen J, Wang YP, Calhoun V, Wilson TW. Neurostructural brain imaging study of trait dissociation in healthy children. BJPsych Open 2022; 8:e172. [PMID: 36148845 PMCID: PMC9534905 DOI: 10.1192/bjo.2022.576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
BACKGROUND Trait dissociation has not been examined from a structural human brain mapping perspective in healthy adults or children. Non-pathological dissociation shares some features with daydreaming and mind-wandering, but also involves subtle disruptions in affect and autobiographical memory. AIMS To identify neurostructural biomarkers of trait dissociation in healthy children. METHOD Typically developing 9- to 15-year-olds (n = 180) without psychological or behavioural disorders were enrolled in the Developmental Chronnecto-Genomics (DevCoG) study of healthy brain development and completed psychological assessments of trauma exposure and dissociation, along with a structural T1-weighted magnetic resonance imaging. We conducted univariate ANCOVA generalised linear models for each region of the default mode network examining the effects of trait dissociation, including scanner site, age, gender and trauma as covariates and correcting for multiple comparison. RESULTS We found that the precuneus was significantly larger in children with higher levels of trait dissociation but this was not related to trauma exposure. The inferior parietal volume was smaller in children with higher levels of trauma but was not related to dissociation. No other regions of interest, including frontal and limbic structures, were significantly related to trait dissociation even before multiple comparison correction. CONCLUSIONS Trait dissociation reflects subtle cognitive disruptions worthy of study in healthy people and warrants study as a potential risk factor for psychopathology. This neurostructural study of trait dissociation in healthy children identified the precuneus as an essential brain region to consider in future dissociation research.
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Affiliation(s)
- Amy S Badura Brack
- Department of Psychological Science, Creighton University, Omaha, Nebraska, USA
| | - Marika Marklin
- Department of Psychological Science, Creighton University, Omaha, Nebraska, USA
| | - Christine M Embury
- Institute for Human Neuroscience, Boys Town National Research Hospital, Omaha, Nebraska, USA; and Department of Psychology, University of Nebraska - Omaha, Nebraska, USA
| | - Giorgia Picci
- Institute for Human Neuroscience, Boys Town National Research Hospital, Omaha, Nebraska, USA
| | - Michaela Frenzel
- Institute for Human Neuroscience, Boys Town National Research Hospital, Omaha, Nebraska, USA; and Department of Psychology, University of Nebraska - Omaha, Nebraska, USA
| | | | - Julia Stephen
- The Mind Research Network, Albuquerque, New Mexico, USA
| | - Yu-Ping Wang
- Department of Biomedical Engineering, Tulane University, New Orleans, Louisiana, USA
| | - Vince Calhoun
- Tri-institutional Center for Translational Research in Neuroimaging and Data Science, Georgia State University, Georgia Institute of Technology, and Emory University, Atlanta, Georgia, USA
| | - Tony W Wilson
- Institute for Human Neuroscience, Boys Town National Research Hospital, Omaha, Nebraska, USA; and Department of Psychology, University of Nebraska - Omaha, Nebraska, USA
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7
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Agcaoglu O, Wilson TW, Wang YP, Stephen J, Calhoun V. Longitudinal Changes in Resting State FMRI Spectra in Children. 2022 44th Annual International Conference of the IEEE Engineering in Medicine & Biology Society (EMBC) 2022; 2022:3729-3732. [PMID: 36085989 DOI: 10.1109/embc48229.2022.9871221] [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] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Longitudinal studies can provide more precise measure of brain development, as they focus on within-subject variability, as opposed to cross-sectional studies. In this study, we track longitudinal changes in resting state fMRI data using spectrum of time-courses generated via group independent component analysis (gICA), in a multi time point dataset containing healthy children 8-18 years old, collected on both eyes open and eyes closed resting state conditions. Clinical Relevance - Tracking normal brain development and identifying biomarkers of healthy brain development are critically important to diagnose mental disorders at early ages. We found increased spectral power in low frequencies and decreased spectral power in high frequencies in children with typical development in both the eyes open and eyes closed conditions though the eyes closed condition showed greater changes with development mostly in the visual networks. Results are also replicated on an independent dataset.
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Affiliation(s)
- Oktay Agcaoglu
- Georgia State University, Georgia Institute of Technology, Emory University,Tri-institutional Center for Translational Research in Neuroimaging and Data Science,Atlanta,Georgia,USA,30303
| | - Tony W. Wilson
- Institute for Human Neuroscience,Boys Town National Research Hospital,Boys Town,NE,USA,68010
| | - Yu-Ping Wang
- Tulane University,Department of Biomedical Engineering,New Orleans,LA,USA,70118
| | | | - Vince Calhoun
- Georgia State University, Georgia Institute of Technology, Emory University,Tri-institutional Center for Translational Research in Neuroimaging and Data Science,Atlanta,Georgia,USA,30303
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8
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Borna A, Iivanainen J, Carter TR, McKay J, Taulu S, Stephen J, Schwindt PDD. Cross-Axis projection error in optically pumped magnetometers and its implication for magnetoencephalography systems. Neuroimage 2021; 247:118818. [PMID: 34915157 PMCID: PMC8929686 DOI: 10.1016/j.neuroimage.2021.118818] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Revised: 11/22/2021] [Accepted: 12/13/2021] [Indexed: 10/25/2022] Open
Abstract
Optically pumped magnetometers (OPMs) developed for magnetoencephalography (MEG) typically operate in the spin-exchange-relaxation-free (SERF) regime and measure a magnetic field component perpendicular to the propagation axis of the optical-pumping photons. The most common type of OPM for MEG employs alkali atoms, e.g. 87Rb, as the sensing element and one or more lasers for preparation and interrogation of the magnetically sensitive states of the alkali atoms ensemble. The sensitivity of the OPM can be greatly enhanced by operating it in the SERF regime, where the alkali atoms' spin exchange rate is much faster than the Larmor precession frequency. The SERF regime accommodates remnant static magnetic fields up to ±5 nT. However, in the presented work, through simulation and experiment, we demonstrate that multi-axis magnetic signals in the presence of small remnant static magnetic fields, not violating the SERF criteria, can introduce significant error terms in OPM's output signal. We call these deterministic errors cross-axis projection errors (CAPE), where magnetic field components of the MEG signal perpendicular to the nominal sensing axis contribute to the OPM signal giving rise to substantial amplitude and phase errors. Furthermore, through simulation, we have discovered that CAPE can degrade localization and calibration accuracy of OPM-based magnetoencephalography (OPM-MEG) systems.
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Affiliation(s)
- Amir Borna
- Sandia National Laboratories, 1515 Eubank Blvd SE, Albuquerque, NM 87123, United States.
| | - Joonas Iivanainen
- Sandia National Laboratories, 1515 Eubank Blvd SE, Albuquerque, NM 87123, United States
| | - Tony R Carter
- Sandia National Laboratories, 1515 Eubank Blvd SE, Albuquerque, NM 87123, United States
| | - Jim McKay
- Candoo Systems Inc., Port Coquitlam, BC V3C 5M2, Canada
| | - Samu Taulu
- University of Washington Seattle, WA 98195, United States
| | - Julia Stephen
- The Mind Research Network, Albuquerque, NM 87106, United States
| | - Peter D D Schwindt
- Sandia National Laboratories, 1515 Eubank Blvd SE, Albuquerque, NM 87123, United States
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Murphy K, Stephen J, Steidley D, Rosenthal J, Hardaway B, Scott R, Coco T, LeMond L. Eculizumab for Treatment of Biopsy Negative Rejection in Heart Transplantation. J Heart Lung Transplant 2021. [DOI: 10.1016/j.healun.2021.01.2011] [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: 11/15/2022] Open
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10
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Nadolski A, Vieira JD, Sobrin JA, Kofman AM, Ade PAR, Ahmed Z, Anderson AJ, Avva JS, Basu Thakur R, Bender AN, Benson BA, Bryant L, Carlstrom JE, Carter FW, Cecil TW, Chang CL, Cheshire JR, Chesmore GE, Cliche JF, Cukierman A, de Haan T, Dierickx M, Ding J, Dutcher D, Everett W, Farwick J, Ferguson KR, Florez L, Foster A, Fu J, Gallicchio J, Gambrel AE, Gardner RW, Groh JC, Guns S, Guyser R, Halverson NW, Harke-Hosemann AH, Harrington NL, Harris RJ, Henning JW, Holzapfel WL, Howe D, Huang N, Irwin KD, Jeong O, Jonas M, Jones A, Korman M, Kovac J, Kubik DL, Kuhlmann S, Kuo CL, Lee AT, Lowitz AE, McMahon J, Meier J, Meyer SS, Michalik D, Montgomery J, Natoli T, Nguyen H, Noble GI, Novosad V, Padin S, Pan Z, Paschos P, Pearson J, Posada CM, Quan W, Rahlin A, Riebel D, Ruhl JE, Sayre JT, Shirokoff E, Smecher G, Stark AA, Stephen J, Story KT, Suzuki A, Tandoi C, Thompson KL, Tucker C, Vanderlinde K, Wang G, Whitehorn N, Yefremenko V, Yoon KW, Young MR. Broadband, millimeter-wave antireflection coatings for large-format, cryogenic aluminum oxide optics. Appl Opt 2020; 59:3285-3295. [PMID: 32400613 DOI: 10.1364/ao.383921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Accepted: 02/25/2020] [Indexed: 06/11/2023]
Abstract
We present two prescriptions for broadband ($ {\sim} 77 - 252\;{\rm GHz} $), millimeter-wave antireflection coatings for cryogenic, sintered polycrystalline aluminum oxide optics: one for large-format (700 mm diameter) planar and plano-convex elements, the other for densely packed arrays of quasi-optical elements-in our case, 5 mm diameter half-spheres (called "lenslets"). The coatings comprise three layers of commercially available, polytetrafluoroethylene-based, dielectric sheet material. The lenslet coating is molded to fit the 150 mm diameter arrays directly, while the large-diameter lenses are coated using a tiled approach. We review the fabrication processes for both prescriptions, then discuss laboratory measurements of their transmittance and reflectance. In addition, we present the inferred refractive indices and loss tangents for the coating materials and the aluminum oxide substrate. We find that at 150 GHz and 300 K the large-format coating sample achieves $ (97 \pm 2)\% $ transmittance, and the lenslet coating sample achieves $ (94 \pm 3)\% $ transmittance.
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Rahaman MA, Turner JA, Gupta CN, Rachakonda S, Chen J, Liu J, van Erp TGM, Potkin S, Ford J, Mathalon D, Lee HJ, Jiang W, Mueller BA, Andreassen O, Agartz I, Sponheim SR, Mayer AR, Stephen J, Jung RE, Canive J, Bustillo J, Calhoun VD. N-BiC: A Method for Multi-Component and Symptom Biclustering of Structural MRI Data: Application to Schizophrenia. IEEE Trans Biomed Eng 2019; 67:110-121. [PMID: 30946659 PMCID: PMC7906485 DOI: 10.1109/tbme.2019.2908815] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
OBJECTIVE We propose and develop a novel biclustering (N-BiC) approach for performing N-way biclustering of neuroimaging data. Our approach is applicable to an arbitrary number of features from both imaging and behavioral data (e.g., symptoms). We applied it to structural MRI data from patients with schizophrenia. METHODS It uses a source-based morphometry approach [i.e., independent component analysis of gray matter segmentation maps] to decompose the data into a set of spatial maps, each of which includes regions that covary among individuals. Then, the loading parameters for components of interest are entered to an exhaustive search, which incorporates a modified depth-first search technique to carry out the biclustering, with the goal of obtaining submatrices where the selected rows (individuals) show homogeneity in their expressions of selected columns (components) and vice versa. RESULTS Findings demonstrate that multiple biclusters have an evident association with distinct brain networks for the different types of symptoms in schizophrenia. The study identifies two components: inferior temporal gyrus (16) and brainstem (7), which are related to positive (distortion/excess of normal function) and negative (diminution/loss of normal function) symptoms in schizophrenia, respectively. CONCLUSION N-BiC is a data-driven method of biclustering MRI data that can exhaustively explore relationships/substructures from a dataset without any prior information with a higher degree of robustness than earlier biclustering applications. SIGNIFICANCE The use of such approaches is important to investigate the underlying biological substrates of mental illness by grouping patients into homogeneous subjects, as the schizophrenia diagnosis is known to be relatively nonspecific and heterogeneous.
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12
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Gao L, Grebogi C, Lai YC, Stephen J, Zhang T, Li Y, Ren H, Li D, Wang J, Schelter B, Sommerlade L. Quantitative assessment of cerebral connectivity deficiency and cognitive impairment in children with prenatal alcohol exposure. Chaos 2019; 29:041101. [PMID: 31042962 PMCID: PMC6445650 DOI: 10.1063/1.5089527] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2019] [Accepted: 02/20/2019] [Indexed: 06/09/2023]
Abstract
It is common knowledge that alcohol consumption during pregnancy would cause cognitive impairment in children. However, recent works suggested that the risk of drinking during pregnancy may have been exaggerated. It is critical to determine whether and up to which amount the consumption of alcohol will affect the cognitive development of children. We evaluate time-varying functional connectivity using magnetoencephalogram data from somatosensory evoked response experiments for 19 teenage subjects with prenatal alcohol exposure and 21 healthy control teenage subjects using a new time-varying connectivity approach, combining renormalised partial directed coherence with state space modeling. Children exposed to alcohol prenatally are at risk of developing a Fetal Alcohol Spectrum Disorder (FASD) characterized by cerebral connectivity deficiency and impaired cognitive abilities. Through a comparison study of teenage subjects exposed to alcohol prenatally with healthy control subjects, we establish that the inter-hemispheric connectivity is deficient for the former, which may lead to disruption in the cortical inter-hemispheric connectivity and deficits in higher order cognitive functions as measured by an IQ test, for example. We provide quantitative evidence that the disruption is correlated with cognitive deficits. These findings could lead to a novel, highly sensitive biomarker for FASD and support a recommendation of no safe amount of alcohol consumption during pregnancy.
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Affiliation(s)
- Lin Gao
- State Key Laboratory of Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, People's Republic of China
| | - Celso Grebogi
- Institute for Complex Systems and Mathematical Biology, King's College, University of Aberdeen, Aberdeen AB24 3UE, United Kingdom
| | - Ying-Cheng Lai
- School of Electrical, Computer and Energy Engineering, Arizona State University, Tempe, Arizona 85287-5706, USA
| | - Julia Stephen
- The Mind Research Network, Albuquerque, New Mexico 87131, USA
| | - Tongsheng Zhang
- Department of Neurology, University of New Mexico, Albuquerque, New Mexico 87131, USA
| | - Yuanli Li
- Department of Rehabilitation Medicine, Shanghai Bei Zhan Hospital, Shanghai 200070, People's Republic of China
| | - Haipeng Ren
- Shaanxi Key Laboratory of Complex System Control and Intelligent Information Processing, Xi'an University of Technology, Xi'an 710048, Shaanxi, People's Republic of China
| | - Dichen Li
- State Key Laboratory of Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, People's Republic of China
| | - Jue Wang
- Institute of Biomedical Engineering, Key Laboratory of Biomedical Information Engineering of Education Ministry, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, People's Republic of China
| | - Bjoern Schelter
- Institute for Complex Systems and Mathematical Biology, King's College, University of Aberdeen, Aberdeen AB24 3UE, United Kingdom
| | - Linda Sommerlade
- Institute for Complex Systems and Mathematical Biology, King's College, University of Aberdeen, Aberdeen AB24 3UE, United Kingdom
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13
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Quinn D, Upston J, Jones T, Richardson J, Worth L, Fratzke V, Stephen J, Hoffer M, Alvarez T, Yaramothu C, Harris-Carriman S, Bikson M, Mayer A. Abstract #1: Individualizing HD-tDCS With fMRI and E-Field Modeling: Pilot Data from the NAVIGATE-TBI Study. Brain Stimul 2019. [DOI: 10.1016/j.brs.2018.12.008] [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: 10/27/2022] Open
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14
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Shenkin SD, Fox C, Goodacre S, Weir CJ, Godfrey M, Siddiqi N, Young J, Anand A, Gray A, Hanley J, MacRaild A, Steven J, Black PL, Boyd J, Tieges Z, Stephen J, MacLullich AM. 131UTILITY OF THE 4AT RAPID ASSESSMENT INSTRUMENT IN ASSESSMENT OF DELIRIUM AND COGNITIVE IMPAIRMENT IN ACUTE CARE. Age Ageing 2019. [DOI: 10.1093/ageing/afy207.01] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
| | - C Fox
- University of East Anglia
| | | | | | | | - N Siddiqi
- University of York, Edinburgh Napier University
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15
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Agcaoglu O, Wilson TW, Wang YP, Stephen J, Calhoun VD. Resting state connectivity differences in eyes open versus eyes closed conditions. Hum Brain Mapp 2019; 40:2488-2498. [PMID: 30720907 DOI: 10.1002/hbm.24539] [Citation(s) in RCA: 99] [Impact Index Per Article: 19.8] [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: 11/01/2018] [Revised: 01/10/2019] [Accepted: 01/25/2019] [Indexed: 01/26/2023] Open
Abstract
Functional magnetic resonance imaging data are commonly collected during the resting state. Resting state functional magnetic resonance imaging (rs-fMRI) is very practical and applicable for a wide range of study populations. Rs-fMRI is usually collected in at least one of three different conditions/tasks, eyes closed (EC), eyes open (EO), or eyes fixated on an object (EO-F). Several studies have shown that there are significant condition-related differences in the acquired data. In this study, we compared the functional network connectivity (FNC) differences assessed via group independent component analysis on a large rs-fMRI dataset collected in both EC and EO-F conditions, and also investigated the effect of covariates (e.g., age, gender, and social status score). Our results indicated that task condition significantly affected a wide range of networks; connectivity of visual networks to themselves and other networks was increased during EO-F, while EC was associated with increased connectivity of auditory and sensorimotor networks to other networks. In addition, the association of FNC with age, gender, and social status was observed to be significant only in the EO-F condition (though limited as well). However, statistical analysis did not reveal any significant effect of interaction between eyes status and covariates. These results indicate that resting-state condition is an important variable that may limit the generalizability of clinical findings using rs-fMRI.
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Affiliation(s)
| | - Tony W Wilson
- Department of Neurological Sciences, University of Nebraska Medical Center, Omaha, Nebraska
| | - Yu-Ping Wang
- Department of Biomedical Engineering, Tulane University, New Orleans, Louisiana.,Department of Global Biostatistics and Data Science, Tulane University, New Orleans, Louisiana
| | | | - Vince D Calhoun
- The Mind Research Network, Albuquerque, New Mexico.,Department of Electrical and Computer Engineering, University of New Mexico, Albuquerque, New Mexico
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16
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Sanfratello L, Aine C, Stephen J. Neuroimaging investigations of dorsal stream processing and effects of stimulus synchrony in schizophrenia. Psychiatry Res Neuroimaging 2018; 278:56-64. [PMID: 29884441 PMCID: PMC6252286 DOI: 10.1016/j.pscychresns.2018.05.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Revised: 05/07/2018] [Accepted: 05/11/2018] [Indexed: 12/11/2022]
Abstract
Impairments in auditory and visual processing are common in schizophrenia (SP). In the unisensory realm visual deficits are primarily noted for the dorsal visual stream. In addition, insensitivity to timing offsets between stimuli are widely reported for SP. The aim of the present study was to test at the physiological level differences in dorsal/ventral stream visual processing and timing sensitivity between SP and healthy controls (HC) using MEG and a simple auditory/visual task utilizing a variety of multisensory conditions. The paradigm included all combinations of synchronous/asynchronous and central/peripheral stimuli, yielding 4 task conditions. Both HC and SP groups showed activation in parietal areas (dorsal visual stream) during all multisensory conditions, with parietal areas showing decreased activation for SP relative to HC, and a significantly delayed peak of activation for SP in intraparietal sulcus (IPS). We also observed a differential effect of stimulus synchrony on HC and SP parietal response. Furthermore, a (negative) correlation was found between SP positive symptoms and activity in IPS. Taken together, our results provide evidence of impairment of the dorsal visual stream in SP during a multisensory task, along with an altered response to timing offsets between presented multisensory stimuli.
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Affiliation(s)
- Lori Sanfratello
- The Mind Research Network, 1101 Yale Blvd NE, Albuquerque, NM 87106 USA.
| | - Cheryl Aine
- The Mind Research Network, 1101 Yale Blvd NE, Albuquerque, NM 87106 USA
| | - Julia Stephen
- The Mind Research Network, 1101 Yale Blvd NE, Albuquerque, NM 87106 USA
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17
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Anand A, Cudmore S, Robertson S, Stephen J, Haga K, Weir CJ, Murray SA, Boyd K, Gunn J, Iqbal J, MacLullich A, Shenkin S, Fox KAA, Mills NL, Denvir MA. P4616Frailty assessment and risk prediction by GRACE score in older patients with acute myocardial infarction. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy563.p4616] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- A Anand
- University of Edinburgh, Centre for Cardiovascular Science, Edinburgh, United Kingdom
| | - S Cudmore
- Royal Infirmary of Edinburgh, Edinburgh, United Kingdom
| | - S Robertson
- Royal Infirmary of Edinburgh, Edinburgh, United Kingdom
| | - J Stephen
- Royal Infirmary of Edinburgh, Edinburgh, United Kingdom
| | - K Haga
- Royal Infirmary of Edinburgh, Edinburgh, United Kingdom
| | - C J Weir
- University of Edinburgh, Edinburgh, United Kingdom
| | - S A Murray
- University of Edinburgh, Edinburgh, United Kingdom
| | - K Boyd
- University of Edinburgh, Edinburgh, United Kingdom
| | - J Gunn
- University of Sheffield, Sheffield, United Kingdom
| | - J Iqbal
- University of Sheffield, Sheffield, United Kingdom
| | - A MacLullich
- University of Edinburgh, Edinburgh, United Kingdom
| | - S Shenkin
- University of Edinburgh, Edinburgh, United Kingdom
| | - K A A Fox
- University of Edinburgh, Edinburgh, United Kingdom
| | - N L Mills
- University of Edinburgh, Centre for Cardiovascular Science, Edinburgh, United Kingdom
| | - M A Denvir
- University of Edinburgh, Centre for Cardiovascular Science, Edinburgh, United Kingdom
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18
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Stephen J, Al-Saleh S, LeMond L, Rosenthal J, Steidley D. Keeping Tacrolimus Levels Therapeutic: Step-Wise Protocol for Itraconazole Discontinuation. J Heart Lung Transplant 2018. [DOI: 10.1016/j.healun.2018.01.780] [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: 10/17/2022] Open
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19
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Thoma RJ, Haghani-Tehrani P, Turner J, Bigelow R, Lewine JD, Clark VP, Yeo RA, Stephen J, Stephen J. Neuropsychological analysis of auditory verbal hallucinations. Schizophr Res 2018; 192:459-460. [PMID: 28461117 PMCID: PMC5788735 DOI: 10.1016/j.schres.2017.03.044] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/05/2016] [Revised: 03/24/2017] [Accepted: 03/27/2017] [Indexed: 10/19/2022]
Abstract
Recent neuropsychological studies have distinguished deficits in verbal working memory, verbal memory, and confrontation naming from other neuropsychological domains as specifically related to the severity of auditory verbal hallucinations (AVH) in schizophrenia (Gisselgard et al., 2014; Siddi et al., 2017). To extend this research, it was hypothesized that AVH severity would be related only to measures within the language domain and the test battery was augmented with the [CTOPP2 and COWAT…define?] to more comprehensively define the language processing functions most predictive of AVH. A neuropsychological test battery was administered to a group of adult patients diagnosed with schizophrenia and schizoaffective disorder (N = 30), who continued to experience AVH despite clinical treatment. Multiple regression analyses demonstrated that poorer performance on measures of verbal working memory and verbal immediate memory significantly predicted greater AVH severity. Going beyond the prior studies, it was also shown that greater impairment of semantic fluency and lesser impairment in delayed general memory were also significant predictors of AVH. Intellectual ability and executive functioning, considered as covariates, were not significant predictors and their inclusion in regression analyses did not affect the pattern of results. Lastly, when cognitive predictors were accounted for, a trend toward an effect of medication (assessed as olanzapine equivalents) emerged such that higher dose predicted less severe AVH. Taken together, better performance on measures of linguistic processes associated with verbal working memory, semantic fluency and verbal learning predicts less severe AVH, perhaps most consistent with limited capacity language processing models. The finding that better delayed memory predicted more severe AVH is consistent with AVH memory models suggesting that AVH are dependent upon information recalled from memory storage.
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Affiliation(s)
- Robert J. Thoma
- Department of Psychiatry, 1 University of New Mexico, MSC 09 5030, Albuquerque, NM, 87131, USA,Mind Research Network and the Lovelace Family of Companies, 1101 Yale NE, Albuquerque, NM, 87131, USA,Department of Psychology, University of New Mexico, Albuquerque, NM, 87131, USA
| | - Poone Haghani-Tehrani
- Department of Psychiatry, 1 University of New Mexico, MSC 09 5030, Albuquerque, NM, 87131, USA
| | - Jessica Turner
- Mind Research Network and the Lovelace Family of Companies, 1101 Yale NE, Albuquerque, NM, 87131, USA,Department of Psychology, Georgia State University, Atlanta, GA, United States
| | - Rose Bigelow
- Department of Psychiatry, 1 University of New Mexico, MSC 09 5030, Albuquerque, NM, 87131, USA
| | - Jeffrey D. Lewine
- Mind Research Network and the Lovelace Family of Companies, 1101 Yale NE, Albuquerque, NM, 87131, USA
| | - Vincent P. Clark
- Mind Research Network and the Lovelace Family of Companies, 1101 Yale NE, Albuquerque, NM, 87131, USA,Department of Psychology, University of New Mexico, Albuquerque, NM, 87131, USA,Psychology Clinical Neuroscience Center, University of New Mexico, Albuquerque, NM, 87131, USA
| | - Ronald A. Yeo
- Mind Research Network and the Lovelace Family of Companies, 1101 Yale NE, Albuquerque, NM, 87131, USA,Department of Psychology, University of New Mexico, Albuquerque, NM, 87131, USA
| | - Julia Stephen
- Mind Research Network and the Lovelace Family of Companies, 1101 Yale NE, Albuquerque, NM, 87131, USA
| | - Julia Stephen
- Mind Research Network, 1101 Yale NE, Albuquerque, NM 87131, USA; The Lovelace Family of Companies, 1101 Yale NE, Albuquerque, NM 87131, USA
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20
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Borna A, Carter TR, Goldberg JD, Colombo AP, Jau YY, Berry C, McKay J, Stephen J, Weisend M, Schwindt PDD. A 20-channel magnetoencephalography system based on optically pumped magnetometers. Phys Med Biol 2017; 62:8909-8923. [PMID: 29035875 DOI: 10.1088/1361-6560/aa93d1] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
We describe a multichannel magnetoencephalography (MEG) system that uses optically pumped magnetometers (OPMs) to sense the magnetic fields of the human brain. The system consists of an array of 20 OPM channels conforming to the human subject's head, a person-sized magnetic shield containing the array and the human subject, a laser system to drive the OPM array, and various control and data acquisition systems. We conducted two MEG experiments: auditory evoked magnetic field and somatosensory evoked magnetic field, on three healthy male subjects, using both our OPM array and a 306-channel Elekta-Neuromag superconducting quantum interference device (SQUID) MEG system. The described OPM array measures the tangential components of the magnetic field as opposed to the radial component measured by most SQUID-based MEG systems. Herein, we compare the results of the OPM- and SQUID-based MEG systems on the auditory and somatosensory data recorded in the same individuals on both systems.
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Affiliation(s)
- Amir Borna
- Sandia National Laboratories, PO Box 5800, Albuquerque, NM 87185-1082, United States of America
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21
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Abat F, Alfredson H, Cucchiarini M, Madry H, Marmotti A, Mouton C, Oliveira JM, Pereira H, Peretti GM, Romero-Rodriguez D, Spang C, Stephen J, van Bergen CJA, de Girolamo L. Current trends in tendinopathy: consensus of the ESSKA basic science committee. Part I: biology, biomechanics, anatomy and an exercise-based approach. J Exp Orthop 2017; 4:18. [PMID: 28560707 PMCID: PMC5449348 DOI: 10.1186/s40634-017-0092-6] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Accepted: 05/12/2017] [Indexed: 12/05/2022] Open
Abstract
Chronic tendinopathies represent a major problem in the clinical practice of sports orthopaedic surgeons, sports doctors and other health professionals involved in the treatment of athletes and patients that perform repetitive actions. The lack of consensus relative to the diagnostic tools and treatment modalities represents a management dilemma for these professionals. With this review, the purpose of the ESSKA Basic Science Committee is to establish guidelines for understanding, diagnosing and treating this complex pathology.
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Affiliation(s)
- F Abat
- Department of Orthopaedic Sports Medicine, ReSport Clinic, Passeig Fabra i Puig 47, 08030, Barcelona, Spain.
| | - H Alfredson
- Sports Medicine Unit, University of Umeå, Umeå, Sweden.,Alfredson Tendon Clinic Inc, Umeå, Sweden.,Pure Sports Medicine Clinic, ISEH, UCLH, London, UK
| | - M Cucchiarini
- Molecular Biology, Center of Experimental Orthopaedics, Saarland University Medical Center, Kirrbergerstr Bldg 37, 66421, Homburg/Saar, Germany
| | - H Madry
- Lehrstuhl für Experimentelle Orthopädie und Arthroseforschung, Universität des Saarlandes, Gebäude 37, Kirrbergerstr 1, 66421, Homburg, Germany
| | - A Marmotti
- Department of Orthopaedics and Traumatology, San Luigi Gonzaga Hospital, Orbassano, University of Turin, Turin, Italy
| | - C Mouton
- Department of Orthopedic Surgery, Clinique d'Eich-Centre Hospitalier de Luxembourg, 76, rue d'Eich, L-1460, Luxembourg, Luxembourg
| | - J M Oliveira
- 3B's Research Group - Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Zona Industrial da Gandra, 4805-017, Barco, GMR, Portugal.,ICVS/3B's - PT Government Associate Laboratory, Braga, Guimarães, Portugal
| | - H Pereira
- 3B's Research Group University of Minho, ICVS/3B's-PT Government Associate Laboratory, Braga, Guimarães, Portugal.,Orthopedic Department Centro Hospitalar Póvoa de Varzim, Vila do Conde, Portugal.,Ripoll y De Prado Sports Clinic - FIFA Medical Centre of Excellence, Murcia, Madrid, Spain
| | - G M Peretti
- IRCCS Istituto Ortopedico Galeazzi, Department of Biomedical Sciences for Health, University of Milan, Milan, Italy
| | - D Romero-Rodriguez
- Department of Physical Therapy and Sports Rehabilitation, ReSport Clinic Barcelona, Barcelona, Spain.,EUSES Sports Science, University of Girona, Girona, Spain
| | - C Spang
- Department of Integrative Medical Biology, Anatomy Section, Umeå University, Umeå, Sweden
| | - J Stephen
- Fortius Clinic, 17 Fitzhardinge St, London, W1H 6EQ, UK.,The Biomechanics Group, Department of Mechanical Engineering, Imperial College, London, UK
| | - C J A van Bergen
- Department of Orthopedic Surgery, Amphia Hospital Breda, Breda, The Netherlands
| | - L de Girolamo
- Orthopaedic Biotechnology Laboratory, Galeazzi Orthopaedic Institute, Milan, Italy
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22
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Stephen J, Scales HE, Benson RA, Erben D, Garside P, Brewer JM. Neutrophil swarming and extracellular trap formation play a significant role in Alum adjuvant activity. NPJ Vaccines 2017; 2:1. [PMID: 29263862 PMCID: PMC5604741 DOI: 10.1038/s41541-016-0001-5] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2016] [Revised: 11/02/2016] [Accepted: 11/02/2016] [Indexed: 12/31/2022] Open
Abstract
There are over 6 billion vaccine doses administered each year, most containing aluminium-based adjuvants, yet we still do not have a complete understanding of their mechanisms of action. Recent evidence has identified host DNA and downstream sensing as playing a significant role in aluminium adjuvant (aluminium hydroxide) activity. However, the cellular source of this DNA, how it is sensed by the immune system and the consequences of this for vaccination remains unclear. Here we show that the very early injection site reaction is characterised by inflammatory chemokine production and neutrophil recruitment. Intravital imaging demonstrates that the Alum injection site is a focus of neutrophil swarms and extracellular DNA strands. These strands were confirmed as neutrophil extracellular traps due to their sensitivity to DNAse and absence in mice deficient in peptidylarginine deiminase 4. Further studies in PAD4−/− mice confirmed a significant role for neutrophil extracellular trap formation in the adjuvant activity of Alum. By revealing neutrophils recruited to the site of Alum injection as a source of the DNA that is detected by the immune system this study provides the missing link between Alum injection and the activation of DNA sensors that enhance adjuvant activity, elucidating a key mechanism of action for this important vaccine component. Researchers have identified the mechanism of action in which aluminium hydroxide (alum) boosts the efficacy of co-administered vaccines. In this study, James Brewer and colleagues from the University of Glasgow, UK, studied the effects of alum co-administration in a mouse model, finding that the compound induces immune cells, called neutrophils, to swarm around the site of immunization and produce neutrophil extracellular traps (NETs). NETs, webs of DNA and cell contents formed under certain conditions of neutrophil cell death, immobilize pathogens and promote their elimination. This study builds on previous research and demonstrates that alum artificially stimulates this pathway to boost the adaptive immune response to vaccine antigens, increasing their immunogenicity. The authors also suggest further study into neutrophil components as potential therapeutic agents.
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Affiliation(s)
- J Stephen
- Institute of Infection, Immunity and Inflammation College of Medical, Veterinary and Life Sciences Sir Graeme Davies Building, University of Glasgow, 120 University Place, Glasgow, G12 8TA Scotland UK
| | - H E Scales
- Institute of Infection, Immunity and Inflammation College of Medical, Veterinary and Life Sciences Sir Graeme Davies Building, University of Glasgow, 120 University Place, Glasgow, G12 8TA Scotland UK
| | - R A Benson
- Institute of Infection, Immunity and Inflammation College of Medical, Veterinary and Life Sciences Sir Graeme Davies Building, University of Glasgow, 120 University Place, Glasgow, G12 8TA Scotland UK
| | - D Erben
- Institute of Infection, Immunity and Inflammation College of Medical, Veterinary and Life Sciences Sir Graeme Davies Building, University of Glasgow, 120 University Place, Glasgow, G12 8TA Scotland UK
| | - P Garside
- Institute of Infection, Immunity and Inflammation College of Medical, Veterinary and Life Sciences Sir Graeme Davies Building, University of Glasgow, 120 University Place, Glasgow, G12 8TA Scotland UK
| | - J M Brewer
- Institute of Infection, Immunity and Inflammation College of Medical, Veterinary and Life Sciences Sir Graeme Davies Building, University of Glasgow, 120 University Place, Glasgow, G12 8TA Scotland UK
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23
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Gupta CN, Castro E, Rachkonda S, van Erp TGM, Potkin S, Ford JM, Mathalon D, Lee HJ, Mueller BA, Greve DN, Andreassen OA, Agartz I, Mayer AR, Stephen J, Jung RE, Bustillo J, Calhoun VD, Turner JA. Biclustered Independent Component Analysis for Complex Biomarker and Subtype Identification from Structural Magnetic Resonance Images in Schizophrenia. Front Psychiatry 2017; 8:179. [PMID: 29018368 PMCID: PMC5623192 DOI: 10.3389/fpsyt.2017.00179] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Accepted: 09/07/2017] [Indexed: 12/14/2022] Open
Abstract
Clinical and cognitive symptoms domain-based subtyping in schizophrenia (Sz) has been critiqued due to the lack of neurobiological correlates and heterogeneity in symptom scores. We, therefore, present a novel data-driven framework using biclustered independent component analysis to detect subtypes from the reliable and stable gray matter concentration (GMC) of patients with Sz. The developed methodology consists of the following steps: source-based morphometry (SBM) decomposition, selection and sorting of two component loadings, subtype component reconstruction using group information-guided ICA (GIG-ICA). This framework was applied to the top two group discriminative components namely the insula/superior temporal gyrus/inferior frontal gyrus (I-STG-IFG component) and the superior frontal gyrus/middle frontal gyrus/medial frontal gyrus (SFG-MiFG-MFG component) from our previous SBM study, which showed diagnostic group difference and had the highest effect sizes. The aggregated multisite dataset consisted of 382 patients with Sz regressed of age, gender, and site voxelwise. We observed two subtypes (i.e., two different subsets of subjects) each heavily weighted on these two components, respectively. These subsets of subjects were characterized by significant differences in positive and negative syndrome scale (PANSS) positive clinical symptoms (p = 0.005). We also observed an overlapping subtype weighing heavily on both of these components. The PANSS general clinical symptom of this subtype was trend level correlated with the loading coefficients of the SFG-MiFG-MFG component (r = 0.25; p = 0.07). The reconstructed subtype-specific component using GIG-ICA showed variations in voxel regions, when compared to the group component. We observed deviations from mean GMC along with conjunction of features from two components characterizing each deciphered subtype. These inherent variations in GMC among patients with Sz could possibly indicate the need for personalized treatment and targeted drug development.
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Affiliation(s)
- Cota Navin Gupta
- The Mind Research Network, Albuquerque, NM, United States.,Department of Biosciences and Bioengineering, Indian Institute of Technology, Guwahati, India
| | - Eduardo Castro
- The Mind Research Network, Albuquerque, NM, United States.,Computational Biology Center, IBM Thomas J. Watson Research, Yorktown Heights, NY, United States
| | | | - Theo G M van Erp
- Department of Psychiatry and Human Behavior, School of Medicine, University of California, Irvine, Irvine, CA, United States
| | - Steven Potkin
- Department of Psychiatry and Human Behavior, School of Medicine, University of California, Irvine, Irvine, CA, United States
| | - Judith M Ford
- Department of Psychiatry, School of Medicine, University of California, San Francisco, San Francisco, CA, United States
| | - Daniel Mathalon
- Department of Psychiatry, School of Medicine, University of California, San Francisco, San Francisco, CA, United States
| | - Hyo Jong Lee
- Divisions of Electronics and Information Engineering, Chonbuk National University, Jeonju, South Korea
| | - Bryon A Mueller
- Department of Psychiatry, University of Minnesota, Minneapolis, MN, United States
| | - Douglas N Greve
- MGH/MIT/HMS Athinoula A. Martinos Center for Biomedical Imaging, Charlestown, MA, United States
| | - Ole A Andreassen
- NORMENT, KG Jebsen Center for Psychosis Research, Institute of Clinical Medicine, University of Oslo, Oslo, Norway.,Division of Mental Health and Addiction, Oslo University Hospital, Oslo, Norway
| | - Ingrid Agartz
- NORMENT, KG Jebsen Center for Psychosis Research, Institute of Clinical Medicine, University of Oslo, Oslo, Norway.,Department of Clinical Neuroscience, Karolinska Institute, Stockholm, Sweden.,Department of Research, Diakonhjemmet Hospital, Oslo, Norway
| | - Andrew R Mayer
- The Mind Research Network, Albuquerque, NM, United States
| | - Julia Stephen
- The Mind Research Network, Albuquerque, NM, United States
| | - Rex E Jung
- Department of Neurosurgery, University of New Mexico Health Sciences Center, Albuquerque, NM, United States
| | - Juan Bustillo
- Department of Psychiatry, University of New Mexico, Albuquerque, NM, United States
| | - Vince D Calhoun
- The Mind Research Network, Albuquerque, NM, United States.,Department of Electrical and Computer Engineering, University of New Mexico, Albuquerque, NM, United States
| | - Jessica A Turner
- The Mind Research Network, Albuquerque, NM, United States.,Department of Psychology, Neuroscience Institute, Georgia State University, Atlanta, GA, United States
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24
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Shahrour MA, Staretz-Chacham O, Dayan D, Stephen J, Weech A, Damseh N, Pri Chen H, Edvardson S, Mazaheri S, Saada A, Hershkovitz E, Shaag A, Huizing M, Abu-Libdeh B, Gahl WA, Azem A, Anikster Y, Vilboux T, Elpeleg O, Malicdan MC. Mitochondrial epileptic encephalopathy, 3-methylglutaconic aciduria and variable complex V deficiency associated with TIMM50 mutations. Clin Genet 2016; 91:690-696. [PMID: 27573165 DOI: 10.1111/cge.12855] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [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: 07/11/2016] [Revised: 08/24/2016] [Accepted: 08/25/2016] [Indexed: 11/26/2022]
Abstract
Mitochondrial encephalopathies are a heterogeneous group of disorders that, usually carry grave prognosis. Recently a homozygous mutation, Gly372Ser, in the TIMM50 gene, was reported in an abstract form, in three sibs who suffered from intractable epilepsy and developmental delay accompanied by 3-methylglutaconic aciduria. We now report on four patients from two unrelated families who presented with severe intellectual disability and seizure disorder, accompanied by slightly elevated lactate level, 3-methylglutaconic aciduria and variable deficiency of mitochondrial complex V. Using exome analysis we identified two homozygous missense mutations, Arg217Trp and Thr252Met, in the TIMM50 gene. The TIMM50 protein is a subunit of TIM23 complex, the mitochondrial import machinery. It serves as the major receptor in the intermembrane space, binding to proteins which cross the mitochondrial inner membrane on their way to the matrix. The mutations, which affected evolutionary conserved residues and segregated with the disease in the families, were neither present in large cohorts of control exome analyses nor in our ethnic specific exome cohort. Given the phenotypic similarity, we conclude that missense mutations in TIMM50 are likely manifesting by severe intellectual disability and epilepsy accompanied by 3-methylglutaconic aciduria and variable mitochondrial complex V deficiency. 3-methylglutaconic aciduria is emerging as an important biomarker for mitochondrial dysfunction, in particular for mitochondrial membrane defects.
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Affiliation(s)
- M A Shahrour
- Department of Pediatrics, Al-Makassed Islamic Hospital, Jerusalem, Israel
| | - O Staretz-Chacham
- Metabolic Disease Unit, Soroka Medical Center, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheba, Israel
| | - D Dayan
- Department of Biochemistry & Molecular Biology, Tel Aviv University, Tel Aviv, Israel
| | - J Stephen
- Section of Human Biochemical Genetics, Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
| | - A Weech
- NIH Undiagnosed Diseases Program, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
| | - N Damseh
- Department of Pediatrics, Al-Makassed Islamic Hospital, Jerusalem, Israel
| | - H Pri Chen
- Department of Biochemistry & Molecular Biology, Tel Aviv University, Tel Aviv, Israel.,Section of Human Biochemical Genetics, Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA.,Graduate Partnerships Program, Tel Aviv University, Tel Aviv, Israel, and the National Institutes of Health, Bethesda, MD, USA
| | - S Edvardson
- Pediatric Neurology Unit, Hadassah, Hebrew University Medical Center Jerusalem, Jerusalem, Israel
| | - S Mazaheri
- Section of Human Biochemical Genetics, Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
| | - A Saada
- Monique and Jacques Roboh Department of Genetic Research, Hadassah, Hebrew University Medical Center Jerusalem, Jerusalem, Israel
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- NIH Intramural Sequencing Center (NISC), National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
| | - E Hershkovitz
- Metabolic Disease Unit, Soroka Medical Center, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheba, Israel
| | - A Shaag
- NIH Intramural Sequencing Center (NISC), National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
| | - M Huizing
- Section of Human Biochemical Genetics, Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
| | - B Abu-Libdeh
- Department of Pediatrics, Al-Makassed Islamic Hospital, Jerusalem, Israel
| | - W A Gahl
- Section of Human Biochemical Genetics, Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA.,NIH Undiagnosed Diseases Program, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
| | - A Azem
- Department of Biochemistry & Molecular Biology, Tel Aviv University, Tel Aviv, Israel
| | - Y Anikster
- Metabolic Disease Unit, Edmond and Lily Safra Children's Hospital, Sheba Medical Center, Tel-Hashomer, Israel.,Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
| | - T Vilboux
- NIH Undiagnosed Diseases Program, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA.,Division of Medical Genomics, Inova Translational Medicine Institute, Fairfax, VA, USA
| | - O Elpeleg
- NIH Intramural Sequencing Center (NISC), National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
| | - M C Malicdan
- Section of Human Biochemical Genetics, Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA.,NIH Undiagnosed Diseases Program, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
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25
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Houck JM, Çetin MS, Mayer AR, Bustillo JR, Stephen J, Aine C, Cañive J, Perrone-Bizzozero N, Thoma RJ, Brookes MJ, Calhoun VD. Magnetoencephalographic and functional MRI connectomics in schizophrenia via intra- and inter-network connectivity. Neuroimage 2016; 145:96-106. [PMID: 27725313 DOI: 10.1016/j.neuroimage.2016.10.011] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [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: 04/02/2016] [Revised: 10/05/2016] [Accepted: 10/07/2016] [Indexed: 12/11/2022] Open
Abstract
Examination of intrinsic functional connectivity using functional MRI (fMRI) has provided important findings regarding dysconnectivity in schizophrenia. Extending these results using a complementary neuroimaging modality, magnetoencephalography (MEG), we present the first direct comparison of functional connectivity between schizophrenia patients and controls, using these two modalities combined. We developed a novel MEG approach for estimation of networks using MEG that incorporates spatial independent component analysis (ICA) and pairwise correlations between independent component timecourses, to estimate intra- and intern-network connectivity. This analysis enables group-level inference and testing of between-group differences. Resting state MEG and fMRI data were acquired from a large sample of healthy controls (n=45) and schizophrenia patients (n=46). Group spatial ICA was performed on fMRI and MEG data to extract intrinsic fMRI and MEG networks and to compensate for signal leakage in MEG. Similar, but not identical spatial independent components were detected for MEG and fMRI. Analysis of functional network connectivity (FNC; i.e., pairwise correlations in network (ICA component) timecourses) revealed a differential between-modalities pattern, with greater connectivity among occipital networks in fMRI and among frontal networks in MEG. Most importantly, significant differences between controls and patients were observed in both modalities. MEG FNC results in particular indicated dysfunctional hyperconnectivity within frontal and temporal networks in patients, while in fMRI FNC was always greater for controls than for patients. This is the first study to apply group spatial ICA as an approach to leakage correction, and as such our results may be biased by spatial leakage effects. Results suggest that combining these two neuroimaging modalities reveals additional disease-relevant patterns of connectivity that were not detectable with fMRI or MEG alone.
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Affiliation(s)
- Jon M Houck
- Center on Alcoholism, Substance Abuse, and Addictions, University of New Mexico, Albuquerque, New Mexico, United States; Mind Research Network, Albuquerque, New Mexico, United States.
| | - Mustafa S Çetin
- Center on Alcoholism, Substance Abuse, and Addictions, University of New Mexico, Albuquerque, New Mexico, United States; Mind Research Network, Albuquerque, New Mexico, United States; Department of Electrical and Computer Engineering, University of New Mexico, Albuquerque, New Mexico, United States
| | - Andrew R Mayer
- Mind Research Network, Albuquerque, New Mexico, United States
| | - Juan R Bustillo
- Center on Alcoholism, Substance Abuse, and Addictions, University of New Mexico, Albuquerque, New Mexico, United States; Department of Psychiatry, University of New Mexico, Albuquerque, New Mexico, United States
| | - Julia Stephen
- Mind Research Network, Albuquerque, New Mexico, United States
| | - Cheryl Aine
- Center on Alcoholism, Substance Abuse, and Addictions, University of New Mexico, Albuquerque, New Mexico, United States; Mind Research Network, Albuquerque, New Mexico, United States; Department of Radiology, University of New Mexico, Albuquerque, New Mexico, United States
| | - Jose Cañive
- Center on Alcoholism, Substance Abuse, and Addictions, University of New Mexico, Albuquerque, New Mexico, United States; Department of Psychiatry, University of New Mexico, Albuquerque, New Mexico, United States
| | - Nora Perrone-Bizzozero
- Center on Alcoholism, Substance Abuse, and Addictions, University of New Mexico, Albuquerque, New Mexico, United States; Department of Neurosciences, University of New Mexico, Albuquerque, New Mexico, United States
| | - Robert J Thoma
- Center on Alcoholism, Substance Abuse, and Addictions, University of New Mexico, Albuquerque, New Mexico, United States; Department of Psychiatry, University of New Mexico, Albuquerque, New Mexico, United States
| | - Matthew J Brookes
- Department of Psychiatry, University of New Mexico, Albuquerque, New Mexico, United States; University of Nottingham, United Kingdom
| | - Vince D Calhoun
- Mind Research Network, Albuquerque, New Mexico, United States; Department of Electrical and Computer Engineering, University of New Mexico, Albuquerque, New Mexico, United States
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26
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Abstract
The previous research reveals the presence of relatively strong spatial correlations from spontaneous activity over cortex in Electroencephalography (EEG) and Magnetoencephalography (MEG) measurement. A critical obstacle in MEG current source mapping is that strong background activity masks the relatively weak local information. In this paper, the hypothesis is that the dominant components of this background activity can be captured by the first Principal Component (PC) after employing Principal Component Analysis (PCA), thus discarding the first PC before the back projection would enhance the exposure of the information carried by a subset of sensors that reflects the local neuronal activity. By detecting MEG signals densely (one measurement per 2×2 mm2) in three piglets neocortical models over an area of 18×26 mm2 with a special shape of lesion by means of a μSQUID, this basic idea was demonstrated by the fact that a strong activity could be imaged in the lesion region after removing the first PC in Delta, Theta and Alpha band, while the original recordings did not show such activity clearly. Thus, the PCA decomposition can be employed to expose the local activity, which is around the lesion in the piglets' neocortical models, by removing the dominant components of the background activity.
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Affiliation(s)
- Lin Gao
- Institute of Biomedical Engineering, Key Laboratory of Biomedical Information Engineering of Education Ministry, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, P. R. China
| | - Jue Wang
- Institute of Biomedical Engineering, Key Laboratory of Biomedical Information Engineering of Education Ministry, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, P. R. China
| | - Julia Stephen
- The Mind Research Network, Albuquerque, NM 87131, USA
| | - Tongsheng Zhang
- Department of Neurology, University of New Mexico, Albuquerque, NM 87131, USA
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Sanjuan PM, Poremba C, Flynn LR, Savich R, Annett RD, Stephen J. Association between theta power in 6-month old infants at rest and maternal PTSD severity: A pilot study. Neurosci Lett 2016; 630:120-126. [PMID: 27473944 DOI: 10.1016/j.neulet.2016.07.048] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [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: 04/29/2016] [Revised: 07/06/2016] [Accepted: 07/25/2016] [Indexed: 10/21/2022]
Abstract
Compared to infants born to mothers without PTSD, infants born to mothers with active PTSD develop poorer behavioral reactivity and emotional regulation. However, the association between perinatal maternal PTSD and infant neural activation remains largely unknown. This pilot study (N=14) examined the association between perinatal PTSD severity and infant frontal neural activity, as measured by MEG theta power during rest. Results indicated that resting left anterior temporal/frontal theta power was correlated with perinatal PTSD severity (p=0.004). These findings suggest delayed cortical maturation in infants whose mothers had higher perinatal PTSD severity and generate questions regarding perinatal PTSD severity and infant neurophysiological consequences.
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Affiliation(s)
- Pilar M Sanjuan
- Center on Alcoholism, Substance Abuse, and Addictions, University of New Mexico, 2650 Yale Boulevard, SE, MSC11-6280, Albuquerque, NM 87106, USA.
| | - Carly Poremba
- Center on Alcoholism, Substance Abuse, and Addictions, University of New Mexico, 2650 Yale Boulevard, SE, MSC11-6280, Albuquerque, NM 87106, USA.
| | - Lucinda R Flynn
- The Mind Research Network, Lovelace Biomedical and Environmental Research Institute, 1101 Yale Blvd, NE, Albuquerque, NM 87106, USA.
| | - Renate Savich
- Department of Pediatrics, University of Mississippi Medical Center, 2500 N. State St., Jackson, MS 39216, USA.
| | - Robert D Annett
- Department of Pediatrics, University of Mississippi Medical Center, 2500 N. State St., Jackson, MS 39216, USA.
| | - Julia Stephen
- The Mind Research Network, Lovelace Biomedical and Environmental Research Institute, 1101 Yale Blvd, NE, Albuquerque, NM 87106, USA.
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Gupta CN, Calhoun VD, Rachakonda S, Chen J, Patel V, Liu J, Segall J, Franke B, Zwiers MP, Arias-Vasquez A, Buitelaar J, Fisher SE, Fernandez G, van Erp TGM, Potkin S, Ford J, Mathalon D, McEwen S, Lee HJ, Mueller BA, Greve DN, Andreassen O, Agartz I, Gollub RL, Sponheim SR, Ehrlich S, Wang L, Pearlson G, Glahn DC, Sprooten E, Mayer AR, Stephen J, Jung RE, Canive J, Bustillo J, Turner JA. Patterns of Gray Matter Abnormalities in Schizophrenia Based on an International Mega-analysis. Schizophr Bull 2015; 41:1133-42. [PMID: 25548384 PMCID: PMC4535628 DOI: 10.1093/schbul/sbu177] [Citation(s) in RCA: 163] [Impact Index Per Article: 18.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Analyses of gray matter concentration (GMC) deficits in patients with schizophrenia (Sz) have identified robust changes throughout the cortex. We assessed the relationships between diagnosis, overall symptom severity, and patterns of gray matter in the largest aggregated structural imaging dataset to date. We performed both source-based morphometry (SBM) and voxel-based morphometry (VBM) analyses on GMC images from 784 Sz and 936 controls (Ct) across 23 scanning sites in Europe and the United States. After correcting for age, gender, site, and diagnosis by site interactions, SBM analyses showed 9 patterns of diagnostic differences. They comprised separate cortical, subcortical, and cerebellar regions. Seven patterns showed greater GMC in Ct than Sz, while 2 (brainstem and cerebellum) showed greater GMC for Sz. The greatest GMC deficit was in a single pattern comprising regions in the superior temporal gyrus, inferior frontal gyrus, and medial frontal cortex, which replicated over analyses of data subsets. VBM analyses identified overall cortical GMC loss and one small cluster of increased GMC in Sz, which overlapped with the SBM brainstem component. We found no significant association between the component loadings and symptom severity in either analysis. This mega-analysis confirms that the commonly found GMC loss in Sz in the anterior temporal lobe, insula, and medial frontal lobe form a single, consistent spatial pattern even in such a diverse dataset. The separation of GMC loss into robust, repeatable spatial patterns across multiple datasets paves the way for the application of these methods to identify subtle genetic and clinical cohort effects.
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Affiliation(s)
| | | | | | - Jiayu Chen
- The Mind Research Network, Albuquerque, NM
| | | | - Jingyu Liu
- The Mind Research Network, Albuquerque, NM;,Department of Electrical and Computer Engineering, University of New Mexico, Albuquerque, NM
| | | | - Barbara Franke
- Department of Psychiatry and Human Genetics, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands;,Department of Cognitive Neuroscience, Donders Institute for Brain, Cognition and Behavior, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands
| | - Marcel P. Zwiers
- Department of Cognitive Neuroscience, Donders Institute for Brain, Cognition and Behavior, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands
| | - Alejandro Arias-Vasquez
- Department of Psychiatry and Human Genetics, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
| | - Jan Buitelaar
- Department of Cognitive Neuroscience, Donders Institute for Brain, Cognition and Behavior, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands
| | - Simon E. Fisher
- Department of Cognitive Neuroscience, Donders Institute for Brain, Cognition and Behavior, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands;,Department of Language and Genetics, Max Planck Institute for Psycholinguistics, Nijmegen, The Netherlands
| | - Guillen Fernandez
- Department of Cognitive Neuroscience, Donders Institute for Brain, Cognition and Behavior, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands
| | - Theo G. M. van Erp
- Department of Psychiatry & Human Behavior, School of Medicine, University of California, Irvine, CA
| | - Steven Potkin
- Department of Psychiatry & Human Behavior, School of Medicine, University of California, Irvine, CA
| | - Judith Ford
- Department of Psychiatry, School of Medicine, University of California, San Francisco, CA
| | - Daniel Mathalon
- Department of Psychiatry, School of Medicine, University of California, San Francisco, CA
| | - Sarah McEwen
- Department of Psychiatry & Biobehavioral Sciences, University of California, Los Angeles, CA
| | - Hyo Jong Lee
- Division of Electronics and Information Engineering, Chonbuk National University, Jeonju, Korea
| | - Bryon A. Mueller
- Department of Psychiatry, University of Minnesota, Minneapolis, MN
| | - Douglas N. Greve
- MGH/MIT/HMS Athinoula A. Martinos Center for Biomedical Imaging, Charlestown, MA
| | - Ole Andreassen
- NORMENT, KG Jebsen Center for Psychosis Research, Institute of Clinical Medicine, University of Oslo, Oslo, Norway;,Division of Mental Health and Addiction, Oslo University Hospital, Oslo, Norway
| | - Ingrid Agartz
- NORMENT, KG Jebsen Center for Psychosis Research, Institute of Clinical Medicine, University of Oslo, Oslo, Norway;,Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden;,Department of Research, Diakonhjemmet Hospital, Oslo, Norway
| | - Randy L. Gollub
- MGH/MIT/HMS Athinoula A. Martinos Center for Biomedical Imaging, Charlestown, MA;,Department of Psychiatry, Massachusetts General Hospital, HMS, Boston, MA
| | - Scott R. Sponheim
- Department of Psychiatry, University of Minnesota, Minneapolis, MN;,Minneapolis VA Healthcare System, Minneapolis, MN
| | - Stefan Ehrlich
- MGH/MIT/HMS Athinoula A. Martinos Center for Biomedical Imaging, Charlestown, MA;,Department of Child and Adolescent Psychiatry, University Hospital Carl Gustav Carus, Dresden University of Technology, Dresden, Germany
| | - Lei Wang
- Department of Psychiatry and Behavioral Sciences, Northwestern University, Chicago, IL;,Department of Radiology, Northwestern University, Chicago, IL
| | - Godfrey Pearlson
- Department of Psychiatry, School of Medicine, Yale University, New Haven, CT;,Institute of Living, Hartford Healthcare Corporation, Hartford, CT;,Department of Neurobiology, School of Medicine, Yale University, New Haven, CT
| | - David C. Glahn
- Department of Psychiatry, School of Medicine, Yale University, New Haven, CT;,Institute of Living, Hartford Healthcare Corporation, Hartford, CT
| | - Emma Sprooten
- Department of Psychiatry, School of Medicine, Yale University, New Haven, CT;,Institute of Living, Hartford Healthcare Corporation, Hartford, CT
| | | | | | - Rex E. Jung
- Department of Neurosurgery, University of New Mexico Health Sciences Center, Albuquerque, NM
| | - Jose Canive
- University of New Mexico Health Sciences Center, Albuquerque, NM;,Department of Psychiatry, University of New Mexico, Albuquerque, NM;,Raymond G. Murphy VA Medical Center, Albuquerque, NM
| | - Juan Bustillo
- University of New Mexico Health Sciences Center, Albuquerque, NM;,Department of Psychiatry, University of New Mexico, Albuquerque, NM
| | - Jessica A. Turner
- The Mind Research Network, Albuquerque, NM;,Department of Psychology and Neuroscience Institute, Georgia State University, Atlanta, GA,To whom correspondence should be addressed; Department of Psychology, Georgia State University, PO Box 5010, Atlanta, GA 30302-5010, US; tel: 404-413-6211, fax: 404-413-6207, e-mail:
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29
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Lawton J, Waugh N, Barnard KD, Noyes K, Harden J, Stephen J, McDowell J, Rankin D. Challenges of optimizing glycaemic control in children with Type 1 diabetes: a qualitative study of parents' experiences and views. Diabet Med 2015; 32:1063-70. [PMID: 25472898 DOI: 10.1111/dme.12660] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 12/01/2014] [Indexed: 12/19/2022]
Abstract
AIMS To explore the difficulties parents encounter in trying to achieve clinically recommended blood glucose levels and how they could be better supported to optimize their child's glycaemic control. METHODS In-depth interviews were conducted with 54 parents of children with Type 1 diabetes (≤ 12 years). Data were analysed thematically. RESULTS Parents described being reluctant and finding it difficult to keep their child's blood glucose levels consistently within clinically recommended ranges. As well as worrying about their child's ability to detect/report hypoglycaemia, parents highlighted a multitude of factors that had an impact on their child's blood glucose levels and over which they could exercise little control. These included: leaving their child with other caregivers who could not be trusted to detect hypoglycaemia; difficulties remotely monitoring and regulating their child's food consumption and activity; and physical and social changes accompanying childhood development. Most parents used two sets of blood glucose targets, with clinically recommended targets employed when their child was in their immediate care and higher targets when in the care of others. Parents described health professionals as lacking understanding of the difficulties they encountered keeping blood glucose within target ranges and needing more empathetic, tailored and realistic advice. CONCLUSION It is not parents' fear of hypoglycaemia in isolation that leads to decisions to raise their child's blood glucose but, rather, parental fear in conjunction with other factors and considerations. Hence, to improve diabetes management in children, these factors may need to be addressed; for instance, by training others in diabetes management and using new technologies. Changes to consultations are also recommended.
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Affiliation(s)
- J Lawton
- Centre for Population Health Sciences, University of Edinburgh, Edinburgh
| | - N Waugh
- Health Sciences, Division of Health Sciences Warwick Medical School, University of Warwick, Coventry
| | - K D Barnard
- Human Development and Health, University of Southampton, Southampton General Hospital, Southampton
| | - K Noyes
- Royal Hospital for Sick Children, Edinburgh
| | - J Harden
- Centre for Population Health Sciences, University of Edinburgh, Edinburgh
| | - J Stephen
- Child Health Department, Borders General Hospital, Melrose
| | - J McDowell
- Nursing and Health Care School, School of Medicine, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - D Rankin
- Centre for Population Health Sciences, University of Edinburgh, Edinburgh
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Nithyanandam S, Joseph M, Stephen J. Ocular complications and loss of vision due to herpes zoster ophthalmicus in patients with HIV infection and a comparison with HIV-negative patients. Int J STD AIDS 2013; 24:106-9. [DOI: 10.1177/0956462412472303] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The aim of the work is to describe the occurrence of ocular complications and loss of vision due to herpes zoster ophthalmicus (HZO) in HIV-positive patients who received early antiviral therapy for HZO. This is a post hoc analysis of prospectively collected data. Twenty-four HIV-positive patients with HZO were included in this report; male to female ratio was 3.8:1; mean age was 33.5 (±14.9) years. The visual outcome was good, with 14/24 patients having 6/6 vision; severe vision loss (≤6/60) occurred in only 2/24. There was no statistical difference in the visual outcome between the HIV-positive and -negative patients ( P = 0.69), although severe vision loss was more likely in HIV-infected patients. The ocular complications of HZO in HIV-infected patients were: reduced corneal sensation (17/24), corneal epithelial lesions (14/24), uveitis (12/24), elevated intraocular pressure (10/24) and extra-ocular muscle palsy (3/24). The severity of rash was similar in the two groups but multidermatomal rash occurred only in HIV-infected patients (4/24). There was no difference in the occurrence of ocular complications of HZO between HIV-positive and HIV-negative patients. HZO associated ocular complications and visual loss is low in HIV-infected patients if treated with HZO antiviral therapy and was comparable with HIV-negative patients. Early institution of HZO antiviral therapy is recommended to reduce ocular complication and vision loss.
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Affiliation(s)
- S Nithyanandam
- Department of Ophthalmology St John's Medical College, Bangalore 560034, India
| | - M Joseph
- Department of Ophthalmology St John's Medical College, Bangalore 560034, India
| | - J Stephen
- Department of Dermatology, St John's Medical College, Bangalore 560034, India
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Stephen J, Fergus K, Sellick S, Speca M, Taylor-Brown J, Turner J, Collie K, McLeod D, Rojubally A. When jurisdictional boundaries become barriers to good patient care. ACTA ACUST UNITED AC 2013; 20:10-3. [PMID: 23443525 DOI: 10.3747/co.20.1209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Canada is a pioneer in remote cancer care delivery to underserved populations; however, it is trailing behind on policies that would support clinicians in providing care using distance technologies. The current policy framework is disjointed, and discussions by professional boards about online jurisprudence associated with licensure appear to be regressive. We hope that by addressing the discrepancies in interjurisdictional practice and focusing on the key issue of "where therapy resides," we will be able to nudge dialogue and thinking closer toward the reasoning and recommendations of national telehealth organizations. We present this discussion of jurisdictional issues and e-health practice in the context of a pan-Canadian online support program developed for cancer patients and family members. Although the present paper uses online support groups as a springboard to advocate for e-health, it ultimately addresses a broader audience: that of all Canadian health care stakeholders.
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Affiliation(s)
- J Stephen
- BC Cancer Agency, Provincial Psychosocial Oncology Program, Vancouver, BC
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32
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Stephen J, Rojubally A, Macgregor K, McLeod D, Speca M, Taylor-Brown J, Fergus K, Collie K, Turner J, Sellick S, Mackenzie G. Evaluation of CancerChatCanada: a program of online support for Canadians affected by cancer. ACTA ACUST UNITED AC 2013; 20:39-47. [PMID: 23443892 DOI: 10.3747/co.20.1210] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
BACKGROUND Professional-led cancer support groups can improve quality of life and address unmet needs, but most Canadians affected by cancer do not have access to or do not make use of cancer support groups. A collaborative interdisciplinary team developed, operated, and evaluated Internet-based, professional-led, live-chat support groups (osgs) for cancer patients, caregivers, and survivors across Canada. OBJECTIVE Our study aimed to report participant and participation characteristics in the pan-Canadian initiative known as CancerChatCanada, and to understand participant perspectives about the quality of communication and professional facilitation, overall satisfaction, and psychosocial benefits and outcomes. METHODS Participants in osgs provided informed consent. Participant and participation characteristics were gathered from program data collection tools and are described using frequencies, means, and chi-squares. Patient, survivor, and caregiver perspectives were derived from 102 telephone interviews conducted after osg completion and subjected to a directed qualitative content analysis. RESULTS The 55 professional-led osgs enrolled 351 participants from 9 provinces. More than half the participants came from rural or semirural areas, and more than 84% had no received previous cancer support. The attendance rate was 75%, the dropout rate was 26%, and 80% of participants were satisfied or very satisfied. The convenience and privacy of osgs were benefits. Meaningful communication about important and difficult topics, kinship and bonding with others, and improved mood and self-care were perceived outcomes. CONCLUSIONS Our results demonstrate that this collaborative initiative was successful in increasing reach and access, and that pan-Canadian, professional-led osgs provide psychosocial benefit to underserved and burdened cancer patients, survivors, and family caregivers.
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Affiliation(s)
- J Stephen
- BC Cancer Agency, Provincial Psychosocial Oncology Program, Vancouver, BC
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Gao L, Zhang T, Wang J, Stephen J. Facilitating neuronal connectivity analysis of evoked responses by exposing local activity with principal component analysis preprocessing: simulation of evoked MEG. Brain Topogr 2012; 26:201-11. [PMID: 22918837 DOI: 10.1007/s10548-012-0250-1] [Citation(s) in RCA: 3] [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: 06/19/2012] [Accepted: 08/13/2012] [Indexed: 10/28/2022]
Abstract
When connectivity analysis is carried out for event related EEG and MEG, the presence of strong spatial correlations from spontaneous activity in background may mask the local neuronal evoked activity and lead to spurious connections. In this paper, we hypothesized PCA decomposition could be used to diminish the background activity and further improve the performance of connectivity analysis in event related experiments. The idea was tested using simulation, where we found that for the 306-channel Elekta Neuromag system, the first 4 PCs represent the dominant background activity, and the source connectivity pattern after preprocessing is consistent with the true connectivity pattern designed in the simulation. Improving signal to noise of the evoked responses by discarding the first few PCs demonstrates increased coherences at major physiological frequency bands when removing the first few PCs. Furthermore, the evoked information was maintained after PCA preprocessing. In conclusion, it is demonstrated that the first few PCs represent background activity, and PCA decomposition can be employed to remove it to expose the evoked activity for the channels under investigation. Therefore, PCA can be applied as a preprocessing approach to improve neuronal connectivity analysis for event related data.
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Affiliation(s)
- Lin Gao
- Key Laboratory of Biomedical Information Engineering of Education Ministry, Institute of Biomedical Engineering, Xi'an Jiaotong University, Xi'an, 710049, Shaanxi, People's Republic of China
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Shoemaker JM, Holdsworth MT, Aine C, Calhoun VD, de La Garza R, Feldstein Ewing SW, Hayek R, Mayer AR, Kiehl KA, Petree LE, Sanjuan P, Scott A, Stephen J, Phillips JP. A practical approach to incidental findings in neuroimaging research. Neurology 2011; 77:2123-7. [PMID: 22131543 DOI: 10.1212/wnl.0b013e31823d7687] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE We describe the systematic approach to incidental findings (IFs) used at the Mind Research Network (MRN) where all MRI scans receive neuroradiologist interpretation and participants are provided results. METHODS From 2004 to 2011, 8,545 MRI scans were acquired by 45 researchers. As mandated by MRN's external institutional review board, all structural sequences were evaluated by a clinical neuroradiologist who generated a report that included recommendations for referral if indicated. Investigators received a copy of their participants' reports, which were also mailed to participants unless they specifically declined. To better understand the impact of the radiology review process, a financial analysis was completed in addition to a follow-up phone survey to characterize participant perceptions regarding receiving their MRI scan results. RESULTS The radiologist identified IFs in 34% of the 4,447 participants. Of those with IFs (n = 1,518), the radiologist recommended urgent or immediate referral for 2.5% and routine referral for 17%. For 80.5%, no referral was recommended. Estimated annual cost for this approach including support for the neuroradiologist, medical director, and ancillary staff is approximately $60,000 or $24/scan. The results of the retrospective phone survey showed that 92% of participants appreciated receiving their MRI report, and the majority stated it increased their likelihood of volunteering for future studies. CONCLUSIONS Addressing IFs in a cost-effective and consistent manner is possible by adopting a policy that provides neuroradiology interpretation and offers participant assistance with clinical follow-up when necessary. Our experience suggests that an ethical, institution-wide approach to IFs can be implemented with minimal investigator burden.
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Berchicci M, Zhang T, Romero L, Peters A, Annett R, Teuscher U, Bertollo M, Okada Y, Stephen J, Comani S. Development of mu rhythm in infants and preschool children. Dev Neurosci 2011; 33:130-43. [PMID: 21778699 DOI: 10.1159/000329095] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2010] [Accepted: 05/06/2011] [Indexed: 11/19/2022] Open
Abstract
Mu rhythm is an idling rhythm that originates in the sensorimotor cortex during rest. The frequency of mu rhythm, which is well established in adults, is 8-12 Hz, whereas the limited results available from children suggest a frequency as low as 5.4 Hz at 6 months of age, which gradually increases to the adult value. Understanding the normal development of mu rhythm has important theoretical and clinical implications since we still know very little about this signal in infants and how it develops with age. We measured mu rhythm over the left hemisphere using a pediatric magnetoencephalography (MEG) system in 25 infants (11-47 weeks), 18 preschool children (2-5 years) and 6 adults (20-39 years) for two 5-min sessions during two intermixed conditions: a rest condition in which the hands were at rest, and a prehension condition in which the subject squeezed a pipette with his/her right hand. In all participants, mu rhythm was present over the frontoparietal area during the rest condition, but was clearly suppressed during the prehension condition. Mu rhythm peak frequency, determined from the amplitude spectra, increased rapidly as a function of age from 2.75 Hz at 11 weeks to 8.25 Hz at 47 weeks (r2 = 0.83). It increased very slowly during the preschool period (3.1 ± 0.9 years; 8.5 ± 0.54 Hz). The frequency in these children was, however, lower than in adults (10.3 ± 1.2 Hz). Our results show a rapid maturation in spontaneous mu rhythm during the first year of life.
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Affiliation(s)
- M Berchicci
- BIND--Behavioral Imaging and Neural Dynamics Center, University of Chieti-Pescara, Chieti, Italy.
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Stephen J, Gallop RG, Smith H. Separation of antigens by immunological specificity: Use of disulphide-linked antibodies as immunosorbents. Biochem J 2010; 101:717-20. [PMID: 16742450 PMCID: PMC1270178 DOI: 10.1042/bj1010717] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
1. gamma-Globulin concentrates of antisera prepared against ovalbumin and human serum albumin were thiolated and cross-linked to form insoluble polymers. 2. These immunosorbents were of low solubility and of high capacity for homologous antigen. 3. The high specificity of these immunosorbents was demonstrated by fractionation of various binary mixtures of fluorescent ovalbumin, (131)I-labelled human serum albumin, lysozyme and ribonuclease.
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Affiliation(s)
- J Stephen
- Microbiological Research Establishment, Porton Down, Wilts
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Gallop RG, Tozer BT, Stephen J, Smith H. Separation of antigens by immunological specificity: Use of cellulose-linked antibodies as immunosorbents. Biochem J 2010; 101:711-6. [PMID: 16742449 PMCID: PMC1270177 DOI: 10.1042/bj1010711] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
1. Immunosorbents were prepared by coupling activated aminocellulose with the gamma-globulin concentrates of antisera prepared against ovalbumin and human serum albumin. 2. The immunosorbents were low in solubility, but high in capacity for homologous antigens. 3. The high specificity of these immunosorbents was demonstrated by their use in fractionating various mixtures of fluorescent ovalbumin, (131)I-labelled human serum albumin, lysozyme and ribonuclease.
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Affiliation(s)
- R G Gallop
- Microbiological Research Establishment, Porton Down, Wilts
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Markovic N, McCaig LA, Stephen J, Mizuguchi S, Veldhuizen RAW, Lewis JF, Cepinskas G. Mediators released from LPS-challenged lungs induce inflammatory responses in liver vascular endothelial cells and neutrophilic leukocytes. Am J Physiol Gastrointest Liver Physiol 2009; 297:G1066-76. [PMID: 19815624 DOI: 10.1152/ajpgi.00278.2009] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The systemic inflammatory response plays an important role in the progression of acute lung injury (ALI) to multiple organ dysfunction syndrome (MODS). However, the role of lung-derived inflammatory mediators in induction of the inflammatory response in remote organs is poorly understood. To address the above, we investigated the effects of lung inflammation on induction of inflammatory response(s) in the liver in vitro. Inflammation in mouse lungs was induced by intranasal administration of lipopolysaccharide (LPS; 1 mg/ml) followed by mechanical ventilation using the isolated perfused mouse lung method to obtain and characterize lung perfusate from the pulmonary circulation. LPS administration to mouse lungs resulted in an increased release of inflammation-relevant cytokines and chemokines into the perfusate (Luminex assay) compared with the saline-controls. Subsequently, primary mouse liver vascular endothelial cells (LVEC) or mouse polymorphonuclear leukocytes (PMN) in vitro were stimulated with the perfusate obtained from saline- or LPS-challenged lungs and assessed for various inflammation-relevant end points. The obtained results indicate that stimulation of LVEC with perfusate obtained from LPS-challenged lungs results in 1) reactive oxygen species (ROS) production; 2) activation of NF-kappaB; and 3) expression of E-selectin, ICAM-1, and VCAM-1 and a subsequent increase in PMN rolling and adhesion to LVEC. In addition, perfusate from LPS-challenged lung induced activation of PMN with respect to increased ROS production and upregulation of cell surface levels of adhesion molecules MAC-1 and VLA-4. Heat-inactivation of the perfusate obtained from LPS-challenged lungs was very effective in suppressing increased proadhesive phenotype (i.e., E-selectin and ICAM-1 expression) in LVEC, whereas targeted inhibition (immunoneutralization) of TNF-alpha and/or IL-6 in LPS-lung perfusate had no effect. Taken together, these findings indicate that multiple proinflammatory mediators (proteinaceous in nature) released from inflamed lungs act synergistically to induce systemic activation of circulating PMN and promote inflammatory responses in liver vascular endothelial cells.
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Affiliation(s)
- N Markovic
- Centre for Critical Illness Research, Lawson Health Research Institute, London, ON, Canada
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Pihko E, Nevalainen P, Stephen J, Okada Y, Lauronen L. Maturation of somatosensory cortical processing from birth to adulthood revealed by magnetoencephalography. Clin Neurophysiol 2009; 120:1552-61. [DOI: 10.1016/j.clinph.2009.05.028] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2008] [Revised: 05/19/2009] [Accepted: 05/20/2009] [Indexed: 10/20/2022]
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Berchicci M, Zhang T, Romero L, Peters A, Annett R, Teuscher U, Bertollo M, Okada Y, Comani S, Stephen J. Mu-rhythm detection in infants. Neuroimage 2009. [DOI: 10.1016/s1053-8119(09)71552-6] [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: 11/29/2022] Open
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Linu M, Stephen J, Jisha M. Phosphate Solubilizing Gluconacetobacter sp., Burkholderia
sp. and their Potential Interaction with Cowpea (Vigna unguiculata
(L.) Walp.). ACTA ACUST UNITED AC 2009. [DOI: 10.3923/ijar.2009.79.87] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Sharkey F, Morrison N, Murray R, Iremonger J, Stephen J, Maher E, Tolmie J, Jackson A. 17q21.31 Microdeletion Syndrome: Further Expanding the Clinical Phenotype. Cytogenet Genome Res 2009; 127:61-6. [DOI: 10.1159/000279260] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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Weinerman BH, Kazanjian A, den Duyf J, Loyola M, Fyfe ML, Ashworth V, Stephen J, Macpherson Dr N. Can telehealth offer care delivery alternatives for oncology patients? J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.17519] [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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Mayer AR, Harrington DL, Stephen J, Adair JC, Lee RR. An event-related fMRI Study of exogenous facilitation and inhibition of return in the auditory modality. J Cogn Neurosci 2007; 19:455-67. [PMID: 17335394 DOI: 10.1162/jocn.2007.19.3.455] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [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: 11/04/2022]
Abstract
The orienting of attention to different locations in space is fundamental to most organisms and occurs in all sensory modalities. Orienting has been extensively studied in vision, but to date, few studies have investigated neuronal networks underlying automatic orienting of attention and inhibition of return to auditory signals. In the current experiment, functional magnetic resonance imaging and behavioral data were collected while healthy volunteers performed an auditory orienting task in which a monaurally presented tone pip (cue) correctly or incorrectly cued the location of a target tone pip. The stimulus onset asynchrony (SOA) between the cue and target was 100 or 800 msec. Behavioral results were consistent with previous studies showing that valid auditory cues produced facilitation at the short SOA and inhibition of return at the long SOA. Functional results indicated that the reorienting of attention (100 msec SOA) and inhibition of return (800 msec SOA) were mediated by both common and distinct neuronal structures. Both attention mechanisms commonly activated a network consisting of fronto-oculomotor areas, the left postcentral gyrus, right premotor area, and bilateral tonsil of the cerebellum. Several distinct areas of frontal and parietal activation were identified for the reorienting condition, whereas the right inferior parietal lobule was the only structure uniquely associated with inhibition of return.
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Affiliation(s)
- J Stephen
- The Rowett Research Institute, Bucksburn, Aberdeen
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Huang M, Davis LE, Aine C, Weisend M, Harrington D, Christner R, Stephen J, Edgar JC, Herman M, Meyer J, Paulson K, Martin K, Lee RR. MEG response to median nerve stimulation correlates with recovery of sensory and motor function after stroke. Clin Neurophysiol 2004; 115:820-33. [PMID: 15003762 DOI: 10.1016/j.clinph.2003.11.022] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/17/2003] [Indexed: 12/23/2022]
Abstract
OBJECTIVE Hemiparesis due to damage by stroke in primary motor cortex (MI) or its underlying projections presents a problem for functional neuroimaging technologies that attempt to evaluate the neurophysiological basis for restoration of motor function. Traditional assessments of MI function require patients to move their fingers, hands, or limbs, which can be either impossible or markedly compromised after stroke. We recently demonstrated in normal subjects that magnetoencephalography (MEG), a non-invasive neuromagnetic functional imaging technique, detects neuronal response elicited by electrical median nerve stimulation in MI, as well as primary somatosensory cortex (SI). In the present study, we used the MEG response from median nerve stimulation to investigate the recovery of primary motor and somatosensory in acute ischemic stroke patients. METHODS Twelve patients with unilateral ischemic strokes that affected sensorimotor functions of their hand were studied in the acute stage (4.4+/-1.2 days, mean+/-SD) and during a 1-month follow-up (38.6+/-5.6 days, except for one patient's follow-up done 6 month after stroke). RESULTS Among the multiple cortical sources localized after median nerve stimulation, one source localized to SI and another localized to the vicinity of MI. Changes in the source strengths of the first component post-stimulus of MI and SI correlated with the extent of recovery of sensorimotor functions as determined by neurological exams. CONCLUSIONS This study provides a novel way of indirectly assessing MI function using MEG during the acute stroke phase, when many patients often cannot perform motor tasks due to paralysis.
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Affiliation(s)
- M Huang
- Center for Functional Brain Imaging, Building 49 (114M), New Mexico VA Health Care System, and Department of Radiology, School of Medicine, Health Sciences Center, University of New Mexico, Albequerque, 87108, USA.
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Garcia-Miñaur S, Fantes J, Murray RS, Porteous MEM, Strain L, Burns JE, Stephen J, Warner JP. A novel atypical 22q11.2 distal deletion in father and son. J Med Genet 2002; 39:E62. [PMID: 12362044 PMCID: PMC1734988 DOI: 10.1136/jmg.39.10.e62] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Abstract
A brief overview of some of the main features involved in normal physiological bi-directional absorption and secretion of fluid in the gut is given, including the nature and cellular location of key enzymes, ion pumps, symports, antiports and diffusion channels; the microanatomy of intestinal villous vasculature and the dynamics of villus blood flow, which together generate hypertonic zones in villus tip regions; and the production, differentiation, escalator movement (from crypt to villus tip) and subsequent shedding of intestinal epithelial cells. (Neural and hormonal mechanisms that regulate normal mucosal ion transport are not discussed.) The manner in which Vibrio cholerae, several pathotypes of Escherichia coli, several Salmonella serotypes, rotavirus, Campylobacter species, Shigella dysenteriae, Yersinia species and Clostridium difficile perturb these mechanisms and cause diarrhea, is discussed. Throughout the article, the main emphasis is on experimental studies designed to elucidate biological mechanisms and (where relevant) the microbial determinants responsible for diarrheal disease. Allusions are also made to the involvement of host responses such as the inflammatory response, the production and release of potent cytokines and accelerated homeostatic responses (such as increased rates of crypt cell division seen in some infections), and the role that they play in pathophysiological fluid secretion.
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Affiliation(s)
- J Stephen
- Molecular Microbiology and Cell Biology Group, School of Biological Sciences, The University of Birmingham, Edgbaston, United Kingdom.
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Ashton LA, Stephen J, Nabavi-Tabrizi A, Bleasel J, Briody J. Osteoporosis: A possible aetiological factor in the development of Scheuermann's disease. J Orthop Surg (Hong Kong) 2001; 9:15-17. [PMID: 12468838 DOI: 10.1177/230949900100900104] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The aim of this study was to test the hypothesis that spinal osteoporosis is an aetiological factor in the development of Scheuermann's disease in adolescents. Clinical and radiological data was collected on 12 individuals with Scheuermann's disease (SD). Lumbar spine bone mineral density (L2-4) was measured using dual energy X-ray absorptiometry. Age and sex-matched adolescents were used as controls. The number of standard deviations from the mean of age and sex-matched controls were calculated. In regards to results, SD patients demonstrated high bone densities of between 1 and 1.5 standard deviations above the mean of age-matched controls. These results suggest that osteoporosis is not an aetiological factor in Scheuermann's disease and that bone density measurements may indeed be higher than aged-matched controls in the general population.
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Stephen J, Smith BJ, Marshall DC, Wittam EM. Applications of a semiconductor backscattered electron detector in a scanning electron microscope. ACTA ACUST UNITED AC 2001. [DOI: 10.1088/0022-3735/8/7/021] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [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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