| Video of Jobs Memorial Event at Apple Posted: 23 Oct 2011 09:16 PM PDT Worth watching all the way thru, but the Jonny Ives comments steal the show. Watch it. 
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| Today in Not Being Bullish Enough Posted: 23 Oct 2011 07:17 PM PDT I have a regular conversation with a hedge fund friend wherein I try to convince him (and me) that, bears that we usually are, we aren’t nearly bullish enough. While Evans-Pritchard is often off the mark, these are more or less my arguments for the bullish side. World power swings back to America. The American phoenix is slowly rising again. Within five years or so, the US will be well on its way to self-sufficiency in fuel and energy. Manufacturing will have closed the labour gap with China in a clutch of key industries. The current account might even be in surplus.
via World power swings back to America – Telegraph. 
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| Twitter Digest: 2011-10-23 Posted: 23 Oct 2011 12:00 PM PDT |
| Tickling. Can’t. Why? Posted: 23 Oct 2011 09:12 AM PDT Interesting new paper on … our self-tickling troubles: Why can’t you tickle yourself? Sarah-Jayne Blakemore, Daniel Wolpert and Chris Frith It is well known that you cannot tickle yourself. Here, we discuss the proposal that such attenuation of self-produced tactile stimulation is due to the sensory predictions made by an internal forward model of the motor system. A forward model predicts the sensory consequences of a movement based on the motor command. When a movement is self-produced, its sensory consequences can be accurately predicted, and this prediction can be used to attenuate the sensory effects of the movement. Studies are reviewed that demonstrate that as the discrepancy between predicted and actual sensory feedback increases during self-produced tactile stimulation there is a concomitant decrease in the level of sensory attenuation and an increase in tickliness. Functional neuroimaging studies have demonstrated that this sensory attenuation might be mediated by somato-sensory cortex and anterior cingulate cortex: these areas are activated less by a self-produced tactile stimulus than by the same stimulus when it is externally produced. Further-more, evidence suggests that the cerebellum might be involved in generating the prediction of the sensory consequences of movement. Finally, recent evidence suggests that this predictive mechanism is abnormal in patients with auditory hallucinations and/or passivity experiences. 
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