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  1. Article ; Online: Clinical Considerations and Outcomes for Spine Surgery Patients with a History of Transplant: A Systematic Scoping Review.

    Kalagara, Roshini / Asfaw, Zerubabbel K / Carr, Matthew / Quinones, Addison / Downes, Margaret H / Vasan, Vikram / Li, Troy / McCarthy, Lily / Hrabarchuk, Eugene I / Genadry, Lisa / Schupper, Alexander J / DeMaria, Samuel / Gal, Jonathan S / Choudhri, Tanvir F

    World neurosurgery

    2023  Volume 183, Page(s) 94–105

    Abstract: Objective: The objective of this study was to investigate the perioperative management and outcomes of patients with a prior history of successful transplantation undergoing spine surgery.: Methods: We searched Medline, Embase, and Cochrane Central ... ...

    Abstract Objective: The objective of this study was to investigate the perioperative management and outcomes of patients with a prior history of successful transplantation undergoing spine surgery.
    Methods: We searched Medline, Embase, and Cochrane Central Register of Controlled Trials for matching reports in July 2021. We included case reports, cohort studies, and retrospective analyses, including terms for various transplant types and an exhaustive list of key words for various forms of spine surgery.
    Results: We included 45 studies consisting of 34 case reports (published 1982-2021), 3 cohort analyses (published 2005-2006), and 8 retrospective analyses (published 2006-2020). The total number of patients included in the case reports, cohort studies, and retrospective analysis was 35, 48, and 9695, respectively. The mean 1-year mortality rate from retrospective analyses was 4.6% ± 1.93%, while the prevalence of perioperative complications was 24%. Cohort studies demonstrated an 8.5% ± 12.03% 30-day readmission rate. The most common procedure performed was laminectomy (38.9%) among the case reports. Mortality after spine surgery was noted for 4 of 35 case report patients (11.4%).
    Conclusions: This is the first systematic scoping review examining the population of transplant patients with subsequent unrelated spine surgery. There is significant heterogeneity in the outcomes of post-transplant spine surgery patients. Given the inherent complexity of managing this group and elevated mortality and complications compared to the general spine surgery population, further investigation into their clinical care is warranted.
    MeSH term(s) Humans ; Postoperative Complications/epidemiology ; Retrospective Studies ; Cohort Studies
    Language English
    Publishing date 2023-12-18
    Publishing country United States
    Document type Systematic Review ; Case Reports ; Journal Article ; Review
    ZDB-ID 2534351-8
    ISSN 1878-8769 ; 1878-8750
    ISSN (online) 1878-8769
    ISSN 1878-8750
    DOI 10.1016/j.wneu.2023.12.071
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: A single microcircuit with multiple functions: state dependent information processing in the hippocampus.

    Carr, Margaret F / Frank, Loren M

    Current opinion in neurobiology

    2012  Volume 22, Issue 4, Page(s) 704–708

    Abstract: Many neural circuits process information in multiple distinct modes. For example, the hippocampus is involved in memory encoding, retrieval, and consolidation processes. These different mnemonic computations require processing of differing balances of ... ...

    Abstract Many neural circuits process information in multiple distinct modes. For example, the hippocampus is involved in memory encoding, retrieval, and consolidation processes. These different mnemonic computations require processing of differing balances of current sensory input and previously stored associations. Here we explore patterns of activity in hippocampal output area CA1 associated with different information processing states. We discuss the evidence linking these patterns to specific inputs to CA1 and describe behavioral factors that are related to the balance of synaptic drive. We suggest that understanding the factors that influence information flow in the hippocampal circuit could provide important new insights into how neural circuits are reconfigured on the fly to perform different functions at different times.
    MeSH term(s) CA1 Region, Hippocampal/cytology ; CA1 Region, Hippocampal/physiology ; Humans ; Mental Processes/physiology ; Models, Neurological ; Nerve Net/physiology ; Neurons/physiology
    Language English
    Publishing date 2012-04-03
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 1078046-4
    ISSN 1873-6882 ; 0959-4388
    ISSN (online) 1873-6882
    ISSN 0959-4388
    DOI 10.1016/j.conb.2012.03.007
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: The Effect of Multiple Scopus Profiles on the Perceived Academic Productivity of Neurosurgeons in the United States.

    Vasan, Vikram / Hannah, Theodore C / Downes, Margaret / Li, Troy / Ali, Muhammad / Schupper, Alexander / Carr, Matthew / Kalagara, Roshini / Asfaw, Zerubabbel / Quinones, Addison / Hrabarchuk, Eugene / McCarthy, Lily / Li, Adam Y / Ghatan, Saadi / Choudhri, Tanvir F

    World neurosurgery

    2022  Volume 171, Page(s) e500–e505

    Abstract: Objective: Bibliometrics assessing academic productivity plays a significant role in neurosurgeons' career advancement. This study aimed to evaluate the influence of multiple author profiles on Scopus on neurosurgeon author-level metrics (h-index, ... ...

    Abstract Objective: Bibliometrics assessing academic productivity plays a significant role in neurosurgeons' career advancement. This study aimed to evaluate the influence of multiple author profiles on Scopus on neurosurgeon author-level metrics (h-index, document number, citation number).
    Methods: A list of 1671 academic neurosurgeons was compiled through public searches of hospital and faculty websites for 115 neurosurgical residency training programs. The h-index, document number, and citation number for each neurosurgeon were collected using the Scopus algorithm. For surgeons with multiple profiles, total document number and citation number were calculated by summing results of each profile. Cumulative h-indices were calculated manually. Comparisons were made between surgeons with a single Scopus profile and surgeons with multiple profiles.
    Results: A total of 124 neurosurgeons with multiple profiles were identified. Gender distribution (P = 0.47), years in practice (P = 0.06), subspecialty (P = 0.32), and academic rank (P = 0.16) between neurosurgeons with a single profile versus multiple profiles were similar. Primary profile h-index median was 16 (interquartile range [IQR]: 8-34), combined profiles median was 20 (IQR: 11-36), and percent loss median was 17.3% (IQR: 3%-33%) (P < 0.001). For document number, primary profile median was 46 (IQR: 16-127), combined profiles median was 55 (IQR: 22-148), and percent loss median was 16.2% (IQR: 7%-36%) (P < 0.001). For citation number, primary profile median was 1030 (IQR: 333-4082), combined profiles median was 1319 (IQR: 546-4439), and percent loss median was 14.1% (IQR: 4%-32%) (P < 0.001).
    Conclusions: U.S. academic neurosurgeons with multiple existing profiles on Scopus experience a 17.3% loss in h-index, a 16.2% loss in document number, and a 14.1% loss in citations, heavily undercounting their perceived academic productivity.
    MeSH term(s) United States ; Humans ; Neurosurgeons ; Neurosurgery/education ; Bibliometrics ; Surgeons ; Efficiency
    Language English
    Publishing date 2022-12-14
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2534351-8
    ISSN 1878-8769 ; 1878-8750
    ISSN (online) 1878-8769
    ISSN 1878-8750
    DOI 10.1016/j.wneu.2022.12.056
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Updated baseline prevalence of birth defects potentially related to Zika virus infection.

    Olson, Samantha M / Delaney, Augustina / Jones, Abbey M / Carr, Christopher P / Liberman, Rebecca F / Forestieri, Nina E / Tong, Van T / Gilboa, Suzanne M / Honein, Margaret A / Moore, Cynthia A / Cragan, Janet D

    Birth defects research

    2019  Volume 111, Issue 13, Page(s) 938–940

    MeSH term(s) Congenital Abnormalities/epidemiology ; Female ; Fetus/virology ; Georgia/epidemiology ; Humans ; Massachusetts/epidemiology ; Microcephaly/epidemiology ; North Carolina/epidemiology ; Pregnancy ; Pregnancy Outcome/epidemiology ; Prevalence ; Zika Virus/pathogenicity ; Zika Virus Infection/diagnosis ; Zika Virus Infection/epidemiology ; Zika Virus Infection/physiopathology
    Language English
    Publishing date 2019-07-02
    Publishing country United States
    Document type Letter ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, P.H.S.
    ZDB-ID 2104792-3
    ISSN 2472-1727
    ISSN (online) 2472-1727
    DOI 10.1002/bdr2.1546
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Transient slow gamma synchrony underlies hippocampal memory replay.

    Carr, Margaret F / Karlsson, Mattias P / Frank, Loren M

    Neuron

    2012  Volume 75, Issue 4, Page(s) 700–713

    Abstract: The replay of previously stored memories during hippocampal sharp wave ripples (SWRs) is thought to support both memory retrieval and consolidation in distributed hippocampal-neocortical circuits. Replay events consist of precisely timed sequences of ... ...

    Abstract The replay of previously stored memories during hippocampal sharp wave ripples (SWRs) is thought to support both memory retrieval and consolidation in distributed hippocampal-neocortical circuits. Replay events consist of precisely timed sequences of spikes from CA3 and CA1 neurons that are coordinated both within and across hemispheres. The mechanism of this coordination is not understood. Here, we show that during SWRs in both awake and quiescent states there are transient increases in slow gamma (20-50 Hz) power and synchrony across dorsal CA3 and CA1 networks of both hemispheres. These gamma oscillations entrain CA3 and CA1 spiking. Moreover, during awake SWRs, higher levels of slow gamma synchrony are predictive of higher quality replay of past experiences. Our results indicate that CA3-CA1 gamma synchronization is a central component of awake memory replay and suggest that transient gamma synchronization serves as a clocking mechanism to enable coordinated memory reactivation across the hippocampal network.
    MeSH term(s) Action Potentials/physiology ; Animals ; Brain Waves/physiology ; Hippocampus/cytology ; Hippocampus/physiology ; Linear Models ; Male ; Mental Recall/physiology ; Nerve Net/physiology ; Neurons/physiology ; Rats ; Rats, Long-Evans ; Space Perception/physiology ; Spectrum Analysis ; Time Factors ; Wakefulness
    Language English
    Publishing date 2012-09-05
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 808167-0
    ISSN 1097-4199 ; 0896-6273
    ISSN (online) 1097-4199
    ISSN 0896-6273
    DOI 10.1016/j.neuron.2012.06.014
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Hippocampal SWR activity predicts correct decisions during the initial learning of an alternation task.

    Singer, Annabelle C / Carr, Margaret F / Karlsson, Mattias P / Frank, Loren M

    Neuron

    2013  Volume 77, Issue 6, Page(s) 1163–1173

    Abstract: The hippocampus frequently replays memories of past experiences during sharp-wave ripple (SWR) events. These events can represent spatial trajectories extending from the animal's current location to distant locations, suggesting a role in the evaluation ... ...

    Abstract The hippocampus frequently replays memories of past experiences during sharp-wave ripple (SWR) events. These events can represent spatial trajectories extending from the animal's current location to distant locations, suggesting a role in the evaluation of upcoming choices. While SWRs have been linked to learning and memory, the specific role of awake replay remains unclear. Here we show that there is greater coordinated neural activity during SWRs preceding correct, as compared to incorrect, trials in a spatial alternation task. As a result, the proportion of cell pairs coactive during SWRs was predictive of subsequent correct or incorrect responses on a trial-by-trial basis. This effect was seen specifically during early learning, when the hippocampus is essential for task performance. SWR activity preceding correct trials represented multiple trajectories that included both correct and incorrect options. These results suggest that reactivation during awake SWRs contributes to the evaluation of possible choices during memory-guided decision making.
    MeSH term(s) Animals ; Decision Making/physiology ; Forecasting ; Hippocampus/physiology ; Learning/physiology ; Male ; Psychomotor Performance/physiology ; Random Allocation ; Rats ; Rats, Long-Evans
    Language English
    Publishing date 2013-03-23
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 808167-0
    ISSN 1097-4199 ; 0896-6273
    ISSN (online) 1097-4199
    ISSN 0896-6273
    DOI 10.1016/j.neuron.2013.01.027
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Hippocampal replay in the awake state: a potential substrate for memory consolidation and retrieval.

    Carr, Margaret F / Jadhav, Shantanu P / Frank, Loren M

    Nature neuroscience

    2011  Volume 14, Issue 2, Page(s) 147–153

    Abstract: The hippocampus is required for the encoding, consolidation and retrieval of event memories. Although the neural mechanisms that underlie these processes are only partially understood, a series of recent papers point to awake memory replay as a potential ...

    Abstract The hippocampus is required for the encoding, consolidation and retrieval of event memories. Although the neural mechanisms that underlie these processes are only partially understood, a series of recent papers point to awake memory replay as a potential contributor to both consolidation and retrieval. Replay is the sequential reactivation of hippocampal place cells that represent previously experienced behavioral trajectories and occurs frequently in the awake state, particularly during periods of relative immobility. Awake replay may reflect trajectories through either the current environment or previously visited environments that are spatially remote. The repetition of learned sequences on a compressed time scale is well suited to promote memory consolidation in distributed circuits beyond the hippocampus, suggesting that consolidation occurs in both the awake and sleeping animal. Moreover, sensory information can influence the content of awake replay, suggesting a role for awake replay in memory retrieval.
    MeSH term(s) Hippocampus/physiology ; Humans ; Memory/physiology ; Neurons/physiology ; Sleep/physiology ; Wakefulness/physiology
    Language English
    Publishing date 2011-01-26
    Publishing country United States
    Document type Journal Article ; Review
    ZDB-ID 1420596-8
    ISSN 1546-1726 ; 1097-6256
    ISSN (online) 1546-1726
    ISSN 1097-6256
    DOI 10.1038/nn.2732
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  8. Article ; Online: Rapid and continuous modulation of hippocampal network state during exploration of new places.

    Kemere, Caleb / Carr, Margaret F / Karlsson, Mattias P / Frank, Loren M

    PloS one

    2013  Volume 8, Issue 9, Page(s) e73114

    Abstract: Hippocampal information processing is often described as two-state, with a place cell state during movement and a reactivation state during stillness. Relatively little is known about how the network transitions between these different patterns of ... ...

    Abstract Hippocampal information processing is often described as two-state, with a place cell state during movement and a reactivation state during stillness. Relatively little is known about how the network transitions between these different patterns of activity during exploration. Here we show that hippocampal network changes quickly and continuously as animals explore and become familiar with initially novel places. We measured the relationship between moment-by-moment changes in behavior and information flow through hippocampal output area CA1 in rats. We examined local field potential (LFP) patterns, evoked potentials and ensemble spiking and found evidence suggestive of a smooth transition from strong CA3 drive of CA1 activity at low speeds to entorhinal cortical drive of CA1 activity at higher speeds. These changes occurred with changes in behavior on a timescale of less than a second, suggesting a continuous modulation of information processing in the hippocampal circuit as a function of behavioral state.
    MeSH term(s) Animals ; Behavior, Animal/physiology ; Brain Waves/physiology ; CA1 Region, Hippocampal/cytology ; CA1 Region, Hippocampal/physiology ; CA3 Region, Hippocampal/cytology ; CA3 Region, Hippocampal/physiology ; Evoked Potentials/physiology ; Exploratory Behavior/physiology ; Learning/physiology ; Male ; Nerve Net/cytology ; Nerve Net/physiology ; Neurons/cytology ; Rats ; Time Factors
    Language English
    Publishing date 2013-09-02
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S.
    ISSN 1932-6203
    ISSN (online) 1932-6203
    DOI 10.1371/journal.pone.0073114
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: A New Method for Estimating the Incidence of Infectious Diseases.

    McManus, Hamish / Callander, Denton / Asselin, Jason / McMahon, James / Hoy, Jennifer F / Templeton, David J / Fairley, Christopher K / Donovan, Basil / Pedrana, Alisa E / Keen, Phillip / Wilson, David P / Elliott, Julian / Kaldor, John / Liaw, Siaw-Teng / Petoumenos, Kathy / Holt, Martin / Hellard, Margaret E / Grulich, Andrew E / Carr, Andrew /
    Stoove, Mark A / Guy, Rebecca J

    American journal of epidemiology

    2021  Volume 190, Issue 7, Page(s) 1386–1395

    Abstract: Ambitious World Health Organization targets for disease elimination require monitoring of epidemics using routine health data in settings of decreasing and low incidence. We evaluated 2 methods commonly applied to routine testing results to estimate ... ...

    Abstract Ambitious World Health Organization targets for disease elimination require monitoring of epidemics using routine health data in settings of decreasing and low incidence. We evaluated 2 methods commonly applied to routine testing results to estimate incidence rates that assume a uniform probability of infection between consecutive negative and positive tests based on 1) the midpoint of this interval and 2) a randomly selected point in this interval. We compared these with an approximation of the Poisson binomial distribution, which assigns partial incidence to time periods based on the uniform probability of occurrence in these intervals. We assessed bias, variance, and convergence of estimates using simulations of Weibull-distributed failure times with systematically varied baseline incidence and varying trend. We considered results for quarterly, half-yearly, and yearly incidence estimation frequencies. We applied the methods to assess human immunodeficiency virus (HIV) incidence in HIV-negative patients from the Treatment With Antiretrovirals and Their Impact on Positive and Negative Men (TAIPAN) Study, an Australian study of HIV incidence in men who have sex with men, between 2012 and 2018. The Poisson binomial method had reduced bias and variance at low levels of incidence and for increased estimation frequency, with increased consistency of estimation. Application of methods to real-world assessment of HIV incidence found decreased variance in Poisson binomial model estimates, with observed incidence declining to levels where simulation results had indicated bias in midpoint and random-point methods.
    MeSH term(s) Australia/epidemiology ; Bias ; Computer Simulation ; Epidemics ; Epidemiologic Research Design ; HIV Infections/epidemiology ; Humans ; Incidence ; Male ; Models, Statistical ; Poisson Distribution ; Population Surveillance/methods ; Probability ; Sexual and Gender Minorities/statistics & numerical data ; Statistics as Topic/methods
    Language English
    Publishing date 2021-02-02
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2937-3
    ISSN 1476-6256 ; 0002-9262
    ISSN (online) 1476-6256
    ISSN 0002-9262
    DOI 10.1093/aje/kwab014
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  10. Article ; Online: Soft Tissue Sarcoma, Version 2.2022, NCCN Clinical Practice Guidelines in Oncology.

    von Mehren, Margaret / Kane, John M / Agulnik, Mark / Bui, Marilyn M / Carr-Ascher, Janai / Choy, Edwin / Connelly, Mary / Dry, Sarah / Ganjoo, Kristen N / Gonzalez, Ricardo J / Holder, Ashley / Homsi, Jade / Keedy, Vicki / Kelly, Ciara M / Kim, Edward / Liebner, David / McCarter, Martin / McGarry, Sean V / Mesko, Nathan W /
    Meyer, Christian / Pappo, Alberto S / Parkes, Amanda M / Petersen, Ivy A / Pollack, Seth M / Poppe, Matthew / Riedel, Richard F / Schuetze, Scott / Shabason, Jacob / Sicklick, Jason K / Spraker, Matthew B / Zimel, Melissa / Hang, Lisa E / Sundar, Hema / Bergman, Mary Anne

    Journal of the National Comprehensive Cancer Network : JNCCN

    2022  Volume 20, Issue 7, Page(s) 815–833

    Abstract: Soft tissue sarcomas (STS) are rare malignancies of mesenchymal cell origin that display a heterogenous mix of clinical and pathologic characteristics. STS can develop from fat, muscle, nerves, blood vessels, and other connective tissues. The evaluation ... ...

    Abstract Soft tissue sarcomas (STS) are rare malignancies of mesenchymal cell origin that display a heterogenous mix of clinical and pathologic characteristics. STS can develop from fat, muscle, nerves, blood vessels, and other connective tissues. The evaluation and treatment of patients with STS requires a multidisciplinary team with demonstrated expertise in the management of these tumors. The complete NCCN Clinical Practice Guidelines in Oncology (NCCN Guidelines) for Soft Tissue Sarcoma provide recommendations for the diagnosis, evaluation, and treatment of extremity/superficial trunk/head and neck STS, as well as retroperitoneal/intra-abdominal STS, desmoid tumors, and rhabdomyosarcoma. This portion of the NCCN Guidelines discusses general principles for the diagnosis and treatment of retroperitoneal/intra-abdominal STS, outlines treatment recommendations, and reviews the evidence to support the guidelines recommendations.
    MeSH term(s) Extremities/pathology ; Humans ; Medical Oncology ; Sarcoma/drug therapy ; Sarcoma/therapy ; Soft Tissue Neoplasms/diagnosis ; Soft Tissue Neoplasms/pathology ; Soft Tissue Neoplasms/therapy
    Language English
    Publishing date 2022-01-31
    Publishing country United States
    Document type Journal Article ; Practice Guideline
    ZDB-ID 2250759-0
    ISSN 1540-1413 ; 1540-1405
    ISSN (online) 1540-1413
    ISSN 1540-1405
    DOI 10.6004/jnccn.2022.0035
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