opaqueice;132786 Wrote: > Actually I think there is some debate over this - see for example > http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=pubmed&cmd=Retrieve&dopt=AbstractPlus&list_uids=15925801&itool=iconabstr&query_hl=2&itool=pubmed_docsum > > Fascinating -- thanks for this. It's odd how sometimes we find > interesting information in the most unlikely of places. I've wondered > about this, as has probably anyone who's seens a wheel spinning > "backwards," forever. > > The consensus is that this effect exists and does not depend on > something else (like your water) moving. Personally I've seen it many > times in car hubcaps as traffic pulls away from a light. The arugment > is over why it happens, and the best explanantion is something like > this: that there are two sets of neurons, one for percieving clockwise > motion and one for counter-clockwise. As something rotates clockwise > the CW neurons are activated much more strongly than the CCW ones, but > after some time they get "tired" (or overstimulated or whatever is the > technical term - repeatedly given the same stimulus over and over, > neurons will fire less and less strongly). However the CCW neurons are > also firing a little (and don't tire as fast, since the stimulus was > weaker), and so they at some point overwhelm the CW and you see a > reversal in the motion. For some reason possibly having to do with > some sort of "frame rate" the effect is strongest at certain > frequencies (10-15 Hz).
Fascinating -- thanks for this. It's odd how sometimes we find interesting information in the most unlikely of places. I've wondered about this, as has probably anyone who's seens a wheel spinning "backwards," forever. -- highdudgeon SB3->Nuforce 9.02->Harbeth Monitor 30s/Skylan stands and Quad ESL-988s. Simple and satisfying. ------------------------------------------------------------------------ highdudgeon's Profile: http://forums.slimdevices.com/member.php?userid=2195 View this thread: http://forums.slimdevices.com/showthread.php?t=24693 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/lists/listinfo/audiophiles
