Why is “blindsight” blind? A new perspective on primary visual cortex, recurrent activity and visual awareness

The neuropsychological phenomenon of blindsight has been taken to suggest that the primary visual cortex (V1) plays a unique role in visual awareness, and that extrastriate activation needs to be fed back to V1 in order for the content of that activation to be consciously perceived. The aim of this review is to evaluate this theoretical framework and to revisit its key tenets. Firstly, is blindsight truly a dissociation of awareness and visual detection? Secondly, is there sufficient evidence to rule out the possibility that the loss of awareness resulting from a V1 lesion simply reflects reduced extrastriate responsiveness, rather than a unique role of V1 in conscious experience? Evaluation of these arguments and the empirical evidence leads to the conclusion that the loss of phenomenal awareness in blindsight may not be due to feedback activity in V1 being the hallmark awareness. On the basis of existing literature, an alternative explanation of blindsight is proposed. In this view, visual awareness is a “global” cognitive function as its hallmark is the availability of information to a large number of perceptual and cognitive systems; this requires inter-areal long-range synchronous oscillatory activity. For these oscillations to arise, a specific temporal profile of neuronal activity is required, which is established through recurrent feedback activity involving V1 and the extrastriate cortex. When V1 is lesioned, the loss of recurrent activity prevents inter-areal networks on the basis of oscillatory activity. However, as limited amount of input can reach extrastriate cortex and some extrastriate neuronal selectivity is preserved, computations involving comparison of neural firing rates within a cortical area remain possible. This enables “local” read-out from specific brain regions, allowing for the detection and discrimination of basic visual attributes. Thus blindsight is blind due to lack of “global” long-range synchrony, and it functions via “local” neural readout from extrastriate areas.

Localism as restorative politics; social capital and anti-politics in the London Borough of Burgundia

ABSTRACT The purpose of this paper is to explore the political implications of policies and measures designed to promote “localism”. That is to say, the devolution of power down to a neighbourhood level, as enacted under the 2011 Localism Act. The implementation of localism in London boroughs will be examined. The context is the current concern over disengagement in an era of “anti-politics”, so it is intended to gain an understanding of how localism is interpreted and implemented on the ground. A tentative thesis, of a “restorative politics”, is proposed, such that localism is dynamic and is generating healthy political activity which counters anti-politics in the local community. This could have profound implications for the political parties locally and at Westminster. The extant theories about localism include constructivist interpretations suggesting that a neo-liberal localism is anti-political. This is contested. An emerging narrative heralding a new dawn of empowerment, and related themes concerning social capital, subsidiarity and anti-politics are reviewed. A necessarily empirical approach is adopted in an essentially functionalist frame of reference. There is a review of both academic and policy literature, combined with interviews of professionals involved in localism. This paper is designed to scope a future more substantial piece of research. The conference brief asks; “what scales or levels are appropriate for organising politics in this century”. In a century so far characterised by disillusionment, democratic deficits and abstention, the answer may be; local. The Good Life is lived locally in shared experience and familiar surroundings, hitherto not much amenable to local change. Burgundia is a reference to the film “Passport to Pimlico” (1949), when ABSTRACT The purpose of this paper is to explore the political implications of policies and measures designed to promote “localism”. That is to say, the devolution of power down to a neighbourhood level, as enacted under the 2011 Localism Act. The implementation of localism in London boroughs will be examined. The context is the current concern over disengagement in an era of “anti-politics”, so it is intended to gain an understanding of how localism is interpreted and implemented on the ground. A tentative thesis, of a “restorative politics”, is proposed, such that localism is dynamic and is generating healthy political activity which counters anti-politics in the local community. This could have profound implications for the political parties locally and at Westminster. The extant theories about localism include constructivist interpretations suggesting that a neo-liberal localism is anti-political. This is contested. An emerging narrative heralding a new dawn of empowerment, and related themes concerning social capital, subsidiarity and anti-politics are reviewed. A necessarily empirical approach is adopted in an essentially functionalist frame of reference. There is a review of both academic and policy literature, combined with interviews of professionals involved in localism. This paper is designed to scope a future more substantial piece of research. The conference brief asks; “what scales or levels are appropriate for organising politics in this century”. In a century so far characterised by disillusionment, democratic deficits and abstention, the answer may be; local. The Good Life is lived locally in shared experience and familiar surroundings, hitherto not much amenable to local change. Burgundia is a reference to the film “Passport to Pimlico” (1949), when a London neighbourhood declared independence and its citizens temporarily created the Good Life for themselves. Is the 21st century localism generating a restorative politics?