It is not possible to diagnose anosognosia in schizophrenic patients on brain scan
Despite Fuller Torrey’s accusation, I am aware of the evidence that he cites for brain volume reduction in schizophrenia. However, I do object to his interpretation of this data as evidence of schizophrenia being a brain disease as such and his apparent unwillingness to debate his speculation. Any differences in brain volume are modest and there is an overlap with the normal population. The result is also non-specific as similar findings are found in other psychiatric conditions. Confounding variables such as nutrition and hydration also affect brain volumes. An association does not necessarily imply a causal link, as Fuller Torrey knows, and he should be more cautious in interpreting the data.