| Sumario: | A commentary on B. Crespo-Facorro, S. Paradiso, N.C. Andreasen, D.S. O' Leary, G.L. Watkins, L.L. Boles Ponto, and R.D. Hichwa's “Recalling word lists reveals “cognitive dysmetria” in schizophrenia: a positron emission tomography study,” which appeared in The American Journal of Psychiatry, vol. 156, 199, pp. 386-392. The writers note the striking finding of Crespo-Facorro et al.'s positron emission tomography of a relatively decreased blood flow in the left rostral supplementary motor area. They explain that Crespo-Facorro et al. argued that this hypoactivation could reflect a deficit of internal response selection and the timing/sequencing of mental function. However, they offer an alternative explanation: that the underactivation of the supplementary motor area was linked to impairment of the self-monitoring of inner speech.
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