Again - this article doesnt say much to support what you mentioned. In fact much refutes it , or agrees with the new research above:
"Later in 2011 Andreasen’s group published a paper that reasserted the idea that schizophrenia is responsible for brain shrinkage, in which there is barely a mention of the effects of antipsychotics that were revealed in the group’s earlier paper(7). In this second paper, what the authors did was to assume that any brain shrinkage that could not be accounted for by the method of analysis used to explore the effects of antipsychotic treatment must be attributable to the underlying disease. "
The latest paper by this research group replicates the findings on antipsychotic-induced brain shrinkage, but also claims that brain volume reduction is related to relapse of the psychotic disorder(9).
but the first thing to stress is that the reductions in brain volume that are detected in these MRI studies are small, and it is not certain that changes of this sort have any functional implications. We do not yet know whether these changes are reversible or not.
Ah - and the 10% reference is from an animal study without a control group.
"Animal studies support the link. David Lewis, a neuroscientist and psychiatrist at the University of Pittsburgh, Pennsylvania, found that healthy non-human primates, given doses of antipsychotics similar to those given to humans, showed brain volume reductions of around 10%, mostly attributable to loss of the glial cells that support and protect neurons4,5.
But Lewis, who has written an editorial to accompany Ho's study6, warns that his own, Ho's and other studies are "convergent but still circumstantial". It is impossible to distinguish the effect of the disease from that of the drug, he says, because "both are changing over time""