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  • Conference paper
    Nigmatullina Y, Hellyer PM, Nachev P, Sharp D, Seemungal BMet al., 2014,

    The neuroanatomical correlates of vestibular adaptation in ballet dancers

    , Joint Congress of European Neurology, Publisher: WILEY-BLACKWELL, Pages: 278-278, ISSN: 1351-5101
  • Journal article
    Kwok H-T, Baxter D, DeFelice J, Hellyer P, Kirkman E, Watts S, Midwinter M, Gentleman S, Sharp Det al., 2014,

    The neuropathology of blast traumatic brain injury in a porcine polytrauma model

    , BRAIN INJURY, Vol: 28, Pages: 779-780, ISSN: 0269-9052
  • Journal article
    Baker S, Williams H, Sharp D, Gardner A, Harris A, Zeman A, Fulford Jet al., 2014,

    Sports-related concussion and diffusion tensor imaging findings in rugby players

    , BRAIN INJURY, Vol: 28, Pages: 686-686, ISSN: 0269-9052
  • Journal article
    Simmonds AJ, Wise RJS, Collins C, Redjep O, Sharp DJ, Iverson P, Leech Ret al., 2014,

    Parallel systems in the control of speech

    , HUMAN BRAIN MAPPING, Vol: 35, Pages: 1930-1943, ISSN: 1065-9471
  • Conference paper
    Nigmatullina Y, Hellyer PM, Nachev P, Sharp D, Seemungal BMet al., 2014,

    The neuroanatomical correlates of vestibular adaptation in ballet dancers

    , Joint Congress of European Neurology, Publisher: SPRINGER HEIDELBERG, Pages: S190-S191, ISSN: 0340-5354
  • Journal article
    Sharp DJ, Scott G, Leech R, 2014,

    Network dysfunction after traumatic brain injury

    , NATURE REVIEWS NEUROLOGY, Vol: 10, Pages: 156-166, ISSN: 1759-4758
  • Journal article
    Heymsfield SB, Avena NM, Baier L, Brantley P, Bray GA, Burnett LC, Butler MG, Driscoll DJ, Egli D, Elmquist J, Forster JL, Goldstone AP, Gourash LM, Greenway FL, Han JC, Kane JG, Leibel RL, Loos RJF, Scheimann AO, Roth CL, Seeley RJ, Sheffield V, Tauber M, Vaisse C, Wang L, Waterland RA, Wevrick R, Yanovski JA, Zinn ARet al., 2014,

    Hyperphagia: Current Concepts and Future Directions Proceedings of the 2nd International Conference on Hyperphagia

    , OBESITY, Vol: 22, Pages: S1-S17, ISSN: 1930-7381
  • Journal article
    Ham TE, Bonnelle V, Hellyer P, Jilka S, Robertson IH, Leech R, Sharp DJet al., 2014,

    The neural basis of impaired self-awareness after traumatic brain injury

    , BRAIN, Vol: 137, Pages: 586-597, ISSN: 0006-8950
  • Journal article
    Hellyer PJ, Shanahan MP, Scott G, Wise RJS, Sharp DJ, Leech Ret al., 2014,

    The control of global brain dynamics: opposing actions of frontoparietal control and default mode networks on attention

    , Journal of Neuroscience, Vol: 34, Pages: 451-461, ISSN: 1529-2401

    Understanding how dynamic changes in brain activity control behavior is a major challenge of cognitive neuroscience. Here, we consider the brain as a complex dynamic system and define two measures of brain dynamics: the synchrony of brain activity, measured by the spatial coherence of the BOLD signal across regions of the brain; and metastability, which we define as the extent to which synchrony varies over time. We investigate the relationship among brain network activity, metastability, and cognitive state in humans, testing the hypothesis that global metastability is “tuned” by network interactions. We study the following two conditions: (1) an attentionally demanding choice reaction time task (CRT); and (2) an unconstrained “rest” state. Functional MRI demonstrated increased synchrony, and decreased metastability was associated with increased activity within the frontoparietal control/dorsal attention network (FPCN/DAN) activity and decreased default mode network (DMN) activity during the CRT compared with rest. Using a computational model of neural dynamics that is constrained by white matter structure to test whether simulated changes in FPCN/DAN and DMN activity produce similar effects, we demonstate that activation of the FPCN/DAN increases global synchrony and decreases metastability. DMN activation had the opposite effects. These results suggest that the balance of activity in the FPCN/DAN and DMN might control global metastability, providing a mechanistic explanation of how attentional state is shifted between an unfocused/exploratory mode characterized by high metastability, and a focused/constrained mode characterized by low metastability.
  • Journal article
    Li LM, Menon DK, Janowitz T, 2014,

    Cross-Sectional Analysis of Data from the U.S. Clinical Trials Database Reveals Poor Translational Clinical Trial Effort for Traumatic Brain Injury, Compared with Stroke

    , PLoS ONE, Vol: 9, Pages: e84336-e84336

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