For some reason I have never come across this until my teacher brought it up in phil class last night. I have been searching for information and reading a little bit this morning about research on brain activity and conscious experience done by Benjamin Libet and neurosurgeon Bertram Feinstein. It seems Libet determined in his research with Feinstein that there is approximately a half-second delay between the direct stimulation of areas of the cerebral cortex and the actual report of the sensation from the patient. That didn't seem too odd. What did seem very peculiar is that they also noted in further tests that there were electrical signals in the brain (associated with whatever motor task the patient randomly chose to perform) that preceded the patient's conscious intent to move. I was looking at this particular book review: http://www.the-aps.org/publications/tphys/2005html/FebTPhys/bookreview.htm and a few other web articles. I'm sure many people here are very familiar with this subject. I find it baffling - it just doesn't seem possible - and I wondered what your thoughts were on this.