This is an interchange between Dean Radin and "myself" on his paper "Electrocortical Activity Prior to Unpredictable Stimulii in Meditators and NonMeditators", in which i was a subject and which was covered in a recent blog "Can "nondual" folk know the future? their brains can, but they can't"
GW Zoran Josipovic, @ NYU, w/whom i communicate and saw @ SAND III, who was also a subject, said that there were 35 subjects in the study and that the data was chosen for the best 8. Is that correct...?
DR We ran only 8 nondual meditators and then ran 8 more matched controls (by gender and age). The rest of the subjects were all run before this study, partly to help us get familiar with the data recording procedure and analyses, partly to take advantage of some special people who were visiting the lab, but mainly to thoroughly test the protocol before we began the formal test.
GW Figure 5 of the right superior parietal electrode shows the light, as well as the sound, pre-stimulus responses as different from controls, yet only the sound is viewed as significant indication of prestimulus presentiment. Is this because the light was a positive deviation and only negative (SPN) deviations, as is seen w/sound, are used as there is supportive literature, or was it because the light positive results were not statistically significantly different from controls?
DR The short answer is we don't know. If I had to guess I would speculate that the light stimuli may not have been sufficiently intense to show an effect. Another possibility is that what we're seeing does not arise from primary (or secondary or tertiary) visual or audio cortex, but from some other structure(s) yet to be identified.
GW The decreased activity in the occipital cortex in Figs 4 and 8 is puzzling, as you point on Pg. 10 under "SPN". you attributed it to "complex interactions between auditory and motor cortex activity, or to projections from deeper brain structures".
Is Fig 6 possibly useful in showing that in the audio/free-running image, that what appears to be posterior parietal regions appear to be the strongest negative indicators? Still puzzling that there are no apparent indications in the temporal regions as even if it requires a related motor response, would that completely wipe out a temporal response?
DR Yes, there are lots of puzzles here. The neuroanatomy of presentiment with differential stimuli is virgin territory.
GW Very appreciative for your work. you have done so much to focus attention on areas that others are afraid to venture into; perhaps only places like IONS can initiate work like this. Those of us who live w/in these nondual states are deeply grateful.
DR Thanks very much.
Best wishes,
Dean



No comments:
Post a Comment