tag:blogger.com,1999:blog-26951738.post4567962670299606789..comments2024-03-28T19:14:33.619-07:00Comments on The Splintered Mind: Self-Reported Vividness of Imagery and the CortexEric Schwitzgebelhttp://www.blogger.com/profile/11541402189204286449noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-26951738.post-27059352132313894522007-08-23T07:48:00.000-07:002007-08-23T07:48:00.000-07:00Interesting thought, Pete. My recollection is tha...Interesting thought, Pete. My recollection is that the dorsal stream is usually taken to be more involved with reaching and the parietal/ventral to be more involved with consciousness and verbal labeling. But then the question is which visual *imagery* tasks would correspond to which stream (rotation, memory, etc.); that I'm not sure.<BR/><BR/>Cui et al. looked only at V1 and V2. Amedi et al., however, looked at the whole brain. It looks to me from their figures that, if anything, the ventral stream was relatively *de*-activated during visual imagery -- but the auditory cortex (where they hypothesized and found deactivation) is pretty close to the ventral stream, so I don't know.<BR/><BR/>It would make an interesting follow-up study!Eric Schwitzgebelhttps://www.blogger.com/profile/11541402189204286449noreply@blogger.comtag:blogger.com,1999:blog-26951738.post-61064995476722938462007-08-22T11:44:00.000-07:002007-08-22T11:44:00.000-07:00Eric,Here's a hunch concerning high-vividness self...Eric,<BR/><BR/><BR/>Here's a hunch concerning high-vividness self-report and behavioral tasks: <BR/><BR/>If you buy into the two-streams-of-visual-processing stuff a la Milner and Goodale, then you can sort tasks into those that are more "ventral" and those that are more "parietal" (I am assuming that you are sufficienntly familiar with M&G that my shorthand isn't coming across as gobledegook.) My hunch is that the vividness goes along more with the ventral tasks. <BR/><BR/>This hunch is motivated by readings of the two-streams stuff whereby consciousness is more strongly correlated with ventral stuff than parietal stuff.Anonymousnoreply@blogger.com