Spatial attention enhances object coding in local and distributed representations of the lateral occipital complex

The modulation of neural activity in visual cortex is thought to be a key mechanism of visual attention. The investigation of attentional modulation in high-level visual areas, however, is hampered by the lack of clear tuning or contrast response functions. In the present functional magnetic resonance imaging study we therefore systematically assessed how small voxel-wise biases in object preference across hundreds of voxels in the lateral occipital complex were affected when attention was directed to objects. We found that the strength of attentional modulation depended on a voxel's object preference in the absence of attention, a pattern indicative of an amplificatory mechanism. Our results show that such attentional modulation effectively increased the mutual information between voxel responses and object identity. Further, these local modulatory effects led to improved information-based object readout at the level of multi-voxel activation patterns and to an increased reproducibility of these patterns across repeated presentations. We conclude that attentional modulation enhances object coding in local and distributed object representations of the lateral occipital complex.

Somatic pedagogies: Critiquing and resisting the affective discourse of the neoliberal state from an embodied anarchist perspective.

This paper takes as its context widespread feelings of anxiety within neoliberal society caused by a combination of material and discursive factors including precarious access to work and resources. It is argued that the state uses ‘discourses of affect’ to produce compliant subjects able to deal with (and unable to desire beyond) neoliberal precarity and anxiety. Critical education theorists have argued that discourses of ‘well-being’, emotional support and self-help have gained increasing purchase in mainstream education and in popular culture. These discourses are dangerous because they are individualized and depoliticized, and undermine collective political struggle. At the same time there has been a ‘turn to affect’ in critical academia, producing critical pedagogies that resist state affective discourse. I argue that these practices are essential for problematizing neoliberal discourse, yet existing literature tends to elide the role of the body in effective resistance, emphasising intellectual aspects of critique. The paper sketches an alternative, drawing on psychoanalytic and practiced pedagogies that aim to transgress the mind-body dualism and hierarchy, in particular Roberto Freire’s work on Somatherapy.

The impact of body fat on three dimensional motion of the paediatric foot during walking

Childhood obesity is commonly associated with a pes planus foot type and altered lower limb joint function during walking. However, limited information has been reported on dynamic intersegment foot motion with the level of obesity in children. The aim of this study was to explore the relationships between intersegment foot motion during gait and body fat in boys age 7 to 11 years. Fat mass was measured in fifty-five boys using air displacement plethysmography. Three-dimensional gait analysis was conducted on the right foot of each participant using the 3DFoot model to capture angular motion of the shank, calcaneus, midfoot and metatarsals. Two multivariate statistical techniques were employed; principle component analysis reduced the multidimensional nature of gait analysis, and multiple linear regression analysis accounted for potential confounding factors. Higher fat mass predicted greater plantarflexion of the calcaneus during the first half and end of stance phase and at the end of swing phase. Greater abduction of the calcaneus throughout stance and swing was predicted by greater fat mass. At the midfoot, higher fat mass predicted greater dorsiflexion and eversion throughout the gait cycle. The findings present novel information on the relationships between intersegment angular motion of the foot and body fat in young boys. The data indicates a more pronated foot type in boys with greater body fat. These findings have clinical implications for pes planus and a predisposition for pain and discomfort during weight bearing activities potentially reducing motivation in obese children to be physically active.

Real, rubber or virtual: The vision of “one’s own” body as a means for pain modulation. A narrative review

In the last few years a branch of pain research has been focussing on the modulatory effects of the vision of the body on pain perception. So, for instance, the vision of one’s own real body has been proven to induce analgesic effects. On the other hand, bodily illusions such as the rubber hand illusion have provided new tools for the study of perceptual processes during altered body ownership states. Recently, new paradigms of body ownership made use of a technology that is going places both in clinical and in experimental settings, i.e. virtual reality. While the vision of one’s own real body has been proven to yield compelling analgesic effects, slightly more controversial are those attributed to the vision of “owned” dummy bodies. This review will discuss the studies that examined the effects on pain perception of the vision of the own body, with or without body ownership illusions.