Topographic evoked potentials during backward masking in schizophrenics, patient controls and normal controls

Visual masking & schizophrenia

“…Our results are in agreement with studies on monkey physiology, showing that acetylcholine release increases responses to weak, low contrast stimuli already at the level of the primary visual cortex (e.g., Disney et al, 2007 ). These findings are in line with our EEG studies showing that neural responses to a target are strongly diminished even before the mask arrives in schizophrenia patients compared to controls ( Plomp et al, 2013 ; see also Patterson et al, 1987 ). Interestingly, EEG amplitudes were only slightly different when only a strong mask was presented ( Plomp et al, 2013 ).…”

Visual masking & schizophrenia

“…Our results are in agreement with studies on monkey physiology, showing that acetylcholine release increases responses to weak, low contrast stimuli already at the level of the primary visual cortex (e.g., Disney et al, 2007 ). These findings are in line with our EEG studies showing that neural responses to a target are strongly diminished even before the mask arrives in schizophrenia patients compared to controls ( Plomp et al, 2013 ; see also Patterson et al, 1987 ). Interestingly, EEG amplitudes were only slightly different when only a strong mask was presented ( Plomp et al, 2013 ).…”

The neuropsychology of schizophrenia

“…This is empirically testable with paradigms manipulating contextually generated expectancy, with concurrent measurement of brain events in the millisecond time epoch. Evoked potential waveforms in the 100 msec epoch need to be further explored in schizophrenia (Patterson et al 1987), in addition to such waveforms as the N400 produced by contextually generated expectancy failure in linguistic paradigms.…”

Visual masking & schizophrenia

“…Our results are in agreement with studies on monkey physiology, showing that acetylcholine release increases responses to weak, low contrast stimuli already at the level of the primary visual cortex (e.g., Disney et al, 2007 ). These findings are in line with our EEG studies showing that neural responses to a target are strongly diminished even before the mask arrives in schizophrenia patients compared to controls ( Plomp et al, 2013 ; see also Patterson et al, 1987 ). Interestingly, EEG amplitudes were only slightly different when only a strong mask was presented ( Plomp et al, 2013 ).…”

The neuropsychology of schizophrenia

“…This is empirically testable with paradigms manipulating contextually generated expectancy, with concurrent measurement of brain events in the millisecond time epoch. Evoked potential waveforms in the 100 msec epoch need to be further explored in schizophrenia (Patterson et al 1987), in addition to such waveforms as the N400 produced by contextually generated expectancy failure in linguistic paradigms.…”

Visual masking & schizophrenia

“…Our results are in agreement with studies on monkey physiology, showing that acetylcholine release increases responses to weak, low contrast stimuli already at the level of the primary visual cortex (e.g., Disney et al, 2007 ). These findings are in line with our EEG studies showing that neural responses to a target are strongly diminished even before the mask arrives in schizophrenia patients compared to controls ( Plomp et al, 2013 ; see also Patterson et al, 1987 ). Interestingly, EEG amplitudes were only slightly different when only a strong mask was presented ( Plomp et al, 2013 ).…”

The neuropsychology of schizophrenia

“…This is empirically testable with paradigms manipulating contextually generated expectancy, with concurrent measurement of brain events in the millisecond time epoch. Evoked potential waveforms in the 100 msec epoch need to be further explored in schizophrenia (Patterson et al 1987), in addition to such waveforms as the N400 produced by contextually generated expectancy failure in linguistic paradigms.…”