John Taylor

We discuss experimental support for the existence of a corollary discharge signal of attention movement control and its formulation in terms of the corollary discharge of attention model of attention movement . The data is from fMRI, MEG and EEG activity observed about 200 ms after stimulus onset in various attention paradigms and in which the activity is mainly sited in parietal and extra-striate visual areas. Moreover the data arises from neural activity observed before report of a subject’s experience occurs. The overall experimental support for the existence of a copy of the attention movement control signal generates, it is suggested, a viable route to explore the relation between this signal and human consciousness, as concluded in the paper

An exploration is given of neural network features now being uncovered in cortical processing which begins to go a little way to help bridge the ''Explanatory Gap'' between phenomenal consciousness and correlated brain activity. A survey of properties suggested as being possessed by phenomenal consciousness leads to a set of criteria to be required of the correlated neural activity. Various neural styles of processing are reviewed and those fitting the criteria are selected for further analysis. One particular processing style, in which semiautonomous and long-lasting cortical activity ''bubbles'' are created by input, is selected as being the most appropriate. Further experimental criteria are used to help narrow the possible neural styles involved. This leads to a class of neural models underpinning phenomenal consciousness and to a related set of testable predictions

There has recently been a flurry of interest over how attention and phenomenal consciousness interact. Felipe De Brigard and Jesse Prinz have made the bold claim that attention is necessary and sufficient for phenomenal consciousness. If this turns out to be true, then we will have taken significant steps toward naturalizing the mind, which is a particularly exciting prospect. Against this position, several thinkers have presented empirical data which apparently show that consciousness is possible in the absence of attention, and vice versa. In this paper I argue that these results do not harm De Brigard and Prinz's position, but that this is unsurprising because they use a definition of 'attention'which makes their view empirically self-sealing. I shall also argue that the argument in favour of this definition of attention is unsuccessful. I shall close with some comments on what should be done for the debate to progress. I have three main aims in this paper: firstly to give an overview of the debate, secondly to thoroughly analyse De Brigard and Prinz's position, and thirdly to point out some general and troublesome methodological issues that beset the debate, which have gone largely unacknowledged in the literature. Particularly, I will highlight the cross-purposes which stem from participants using definitions of the key terms in different ways.

We analyze the problem of constructing supersymmetric versions of gauge theories of particles and of gravity which have a closed supersymmetric algebra. Inparticular we present the basic no-go theorems that indicate that in four dimensions it is not possible to construct suitably extended supersymmetric versions of the above theories without drastic modification of the supersymmetric algebra. Two ways past the“N=3” barrier are discussed; that of central charges involved highly constrained versions which appearn difficult to quantize effectively, while the use of light-cone variables seems to be the most promising. We give light-cone gauge versions of supersymmetric Yang-Mills theories for all extended cases of interest and briefly consider their ultraviolet divergence properties