On Monday, September 2, 2013 2:35:43 PM UTC-4, Brent wrote:
>  On 9/2/2013 9:48 AM, Craig Weinberg wrote:
> "Finally, there was a pronounced difference in the effect of regressing 
>> out *spontaneous* activity on the left SMC BOLD-behavior relationship 
>> with instructed versus *spontaneous * force variability. With *
>> spontaneous* force variability, regression of *spontaneous* (right SMC) 
>> activity all but eliminated the left SMC BOLD-behavior relationship. In 
>> contrast, with instructed force variability regressing out 
>> *spontaneous*activity increased the significance of the left SMC 
>> BOLD-behavior effect. 
>> This improvement in significance suggests that regression of *spontaneous
>> * activity removed noise that was independent of the BOLD-behavior 
>> effect in the instructed condition. This finding is important as it shows 
>> that an ipsilateral response alone is not sufficient to eliminate the 
>> BOLD-behavior effect by regression as seen with* spontaneous* force 
>> variability.
>> *In summary, there are three pronounced differences between spontaneous 
>> and instructed force variability in the current experiment: (1) the 
>> reversal of the time course magnitudes, (2) the difference in the timing of 
>> the significant BOLD-behavior effect, and (3) the difference in the effect 
>> of regressing out spontaneous activity. As such, we can be relatively 
>> confident that spontaneous and instructed force variability represent 
>> distinct phenomena in the current experiment. "*
> The study speaks for itself. What I think it means is what the researchers 
> also think it means. I don't know what you could imagine it would mean 
> otherwise. Spontaneous is used here in an ordinary way, not in some obscure 
> medical jargon which somehow actually means "anything but spontaneous". The 
> whole experiment is about isolating spontaneous activity from other types 
> of activity which respond to known conditions.
> You are welcome to explain exactly what you think this study shows in your 
> terms, but don't bother if you are just going to throw out unsupported 
> opinions.
> It's just like my clock.  Every couple of days it gets some external 
> stimuli: I wind it up.  In between its activity is all spontaneous.
Except the experiment shows *conclusively* that the activity is the same 
whether the clocks are wound or not.


> Brent

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