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Studies have produced conflicting evidence regarding whether cognitive
control deficits in patients with schizophrenia result from dysfunction
within the cognitive control network (CCN; top-down) and/or unisensory
To investigate CCN and sensory cortex involvement during multisensory
cognitive control in patients with schizophrenia.
Patients with schizophrenia and healthy controls underwent functional
magnetic resonance imaging while performing a multisensory Stroop task
involving auditory and visual distracters.
Patients with schizophrenia exhibited an overall pattern of response
slowing, and these behavioural deficits were associated with a pattern of
patient hyperactivation within auditory, sensorimotor and posterior
parietal cortex. In contrast, there were no group differences in
functional activation within prefrontal nodes of the CCN, with small
effect sizes observed (incongruent–congruent trials). Patients with
schizophrenia also failed to upregulate auditory cortex with concomitant
increased attentional demands.
Results suggest a prominent role for dysfunction within auditory,
sensorimotor and parietal areas relative to prefrontal CCN nodes during
multisensory cognitive control.
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