Browsing 11 Medical and Health Sciences by Author "Alexander, David"

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Browsing 11 Medical and Health Sciences by Author "Alexander, David"

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  • Wright, James; Alexander, David; Bourke, Paul (Elsevier, 2006)
    We propose a model of self-organization of synaptic connections in V1 emphasizing lateral interactions. Subject to Hebbian learning with decay, evolution of synaptic strengths proceeds to a stable state in which all synapses ...
  • Alexander, David; Arns, Martijn; Paul, Robert; Rowe, Donald; Cooper, Nicholas; Esser, Aristide; Fallahpour, Kamran (Imperial College Press, 2006)
    New treatments for Alzheimer's disease require early detection of cognitive decline. Most studies seeking to identify markers of early cognitive decline have focused on a limited number of measures. We sought to establish ...
  • Alexander, David; Bourke, Paul; Sheridan, Phillip; Konstandatos, Otto; Wright, James (Elsevier Ltd, 2004)
    The local-global map hypothesis states that locally organized response properties??such as orientation preference??result from visuotopically organized local maps of non-retinotopic response properties. In the tree shrew, ...
  • Alexander, David; Wright, James (Cambridge Univ Press, 2006)
    Contextual modulations of receptive field properties by distal stimulus configurations have been shown for a variety of stimulus paradigms. A survey of excitatory contextual modulation data for V1 shows the maximum scale ...
  • Alexander, David; Trengove, Christopher; Wright, James; Boord, Peter; Gordon, Evian (Elsevier BV, 2006)
    Previous research has shown that spatio-temporal waves in the EEG are generally of long spatial wavelength and form smooth patterns of phase gradients at particular time-samples. This paper describes a method to measure ...
  • Alexander, David; Trengove, Christopher; Johnston, Paul; Cooper, Timothy; August, Jp; Gordon, Evian (Elsevier Science Bv, 2005)
    We describe a new method for measuring skin conductance responses, designed to overcome the problem of overlapping skin conductance responses. The method relies on the assumptions that the underlying sudomotor nerve signal ...