Year: 2007
Type: letter
Abstract: Sir, Drs Skottun and Skoyles have written a critique of our paper ‘Subcortical visual dysfunction in schizophrenia drives secondary cortical impairments.’ We appreciate their interest in our paper and the opportunity to participate in scientific dialogue. Our paper examines early visual processing in schizophrenia using two sets of stimuli. In Experiment 1 we used isolated checks of 4, 8, 16, 32 and 64% luminance contrast presented for 60 ms. The low contrast (4, 8%) stimuli were used to bias processing towards the magnocellular pathway, while the higher contrast stimuli were considered to activate both magnocellular and parvocellular pathways. In Experiment 2 we used high luminance contrast (80%) gabor patches (horizontal gratings with a gaussian envelope) of 1.0 cycle/degree (low spatial frequency: LSF) and 5.0 cycles/degree (high spatial frequency: HSF) presented for 100 ms. The LSF stimuli were used to bias processing towards the magnocellular pathway and the HSF stimuli were used to bias processing towards the parvocellular pathway.
Source: Brain
DOI: 10.1093/brain/awm154
Language: English
Subfield: Psychiatry and Mental health
Field: Medicine
Domain: Health Sciences
Open Access status: bronze
OpenAlex ID: W2110101179