Early visual cortical responses produced by checkerboard pattern stimulation

Shigihara, Yoshihito; Hoshi, Hideyuki; Zeki, Semir

doi:10.1016/j.neuroimage.2016.03.078

Cited by 20 publications

(28 citation statements)

References 38 publications

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“…For example, Inui and colleagues (Inui & Ryusuke, 2006; and Moradi (2003) using MEG, reported onset times earlier than 30 ms post onset in early visual cortex. Similarly, Shigihara and colleagues (Shigihara & Zeki, 2013;Shigihara et al, 2016) find significant activity that peaks at around 30-40 ms but starts even earlier. Source reconstruction suggested that activity in this early period extended beyond V1.…”

Section: Comparison To Previous Studiesmentioning

confidence: 81%

“…Rather, the relative latencies are most directly interpretable. The results of studies by Zeki and colleagues (ffytche et al, 1995;Shigihara & Zeki, 2013;Shigihara et al, 2016), suggested parallel activation of V1 and peristriate cortex (i.e. with no lag), although due to the limitation of the method the precise location of the early activity could not be determined.…”

Section: Introductionmentioning

confidence: 99%

“…MEG is similarly constrained by the inverse problem and spatial summation, but since magnetic fields are less distorted by the conductive medium than electric fields, localization is arguably more accurate than with EEG, while maintaining the same high temporal resolution. EEG and MEG studies have shown considerable variability in estimation of the onset time of visual responses (see summary in Shigihara et al, 2016). Some reported surprisingly early onsets in occipital cortex, as early as 25-30 ms (Moradi et al, 2003;Inui & Ryusuke, 2006;Shigihara & Zeki, 2013;, or in some cases even at 10-15ms post onset (Shigihara et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

“…EEG and MEG studies have shown considerable variability in estimation of the onset time of visual responses (see summary in Shigihara et al, 2016). Some reported surprisingly early onsets in occipital cortex, as early as 25-30 ms (Moradi et al, 2003;Inui & Ryusuke, 2006;Shigihara & Zeki, 2013;, or in some cases even at 10-15ms post onset (Shigihara et al, 2016). As previously argued (Shigihara et al, 2016), it is hard to compare absolute onset times between studies because onset times are affected significantly by the luminance, contrast, spatial frequency, size, and location in the visual field of the stimuli.…”

Section: Introductionmentioning

confidence: 99%

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Human posterior parietal cortex responds to visual stimuli as early as peristriate occipital cortex

Regev

Winawer

Gerber

et al. 2018

Preprint

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Much of what is known about the timing of visual processing in the brain is inferred from intracranial studies in monkeys, with human data limited to mainly non-invasive methods with lower spatial resolution. Here, we estimated visual onset latencies from electrocorticographic (ECoG) recordings in a patient who was implanted with 112 sub-dural electrodes, distributed across the posterior cortex of the right hemisphere, for pre-surgical evaluation of intractable epilepsy. Functional MRI prior to surgery was used to determine boundaries of visual areas. The patient was presented with images of objects from several categories. Event Related Potentials (ERPs) were calculated across all categories excluding targets, and statistically reliable onset latencies were determined using a bootstrapping procedure over the single trial

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Section: Comparison To Previous Studiesmentioning

confidence: 81%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Human posterior parietal cortex responds to visual stimuli as early as peristriate occipital cortex

Regev

Winawer

Gerber

et al. 2018

Preprint

View full text Add to dashboard Cite

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“…Due to the fact that the ERG represents the summed activity of different cell types and due to the controversy regarding the exact origin of the retinal oscillatory potential (Doty and Kimura, 1963;Perlman, 2001;Kenyon et al, 2003;Frishman, 2013), it is difficult to speculate about the precise underlying retinal mechanisms of this finding. However, given that the retinal b-wave may peak after the initial responses of visual cortex (Clark et al, 1994;Shigihara et al, 2016), the oscillatory potential may better reflect the timing of the retina's output stages. On the cortical level, these findings corroborate the hypothesis of faster processing of darks than lights (Komban et al, 2014).…”

Section: Discussionmentioning

confidence: 99%

Faster than the brain’s speed of light: Retinocortical interactions differ in high frequency activity when processing darks and lights

Westner

Dalal

2017

Preprint

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Some studies suggest that the processing of darks benefits from greater neural resources in the visual system and potentially occurs faster. However, evidence from the human is still sparse, especially with respect to retinocortical interactions. We recorded retinal and cortical responses to 480 ms light flashes simultaneously with electroretinography (ERG) and magnetencephalography (MEG) in ten participants and analyzed the high frequency responses to the flash onsets and offsets.We show that high frequency oscillations for flash offsets occur earlier than flash onsets in the cortex but not in the retina. Interestingly, while the onset activity involved a wide range of frequencies Hz in the retina, and 55-145 Hz in the cortex), the offset response was restricted to the 75-95 Hz frequency band in both retina and cortex. The results suggest faster propagation times but not earlier retinal processing for darks than lights, suggesting a thalamic role. They also support previous findings that the retinal high frequency activity is transmitted to cortex. Furthermore, the outcomes add to the ongoing discussion about the function of narrowband oscillations in the human visual system.

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Brief Report: Early VEPs to Pattern-Reversal in Adolescents and Adults with Autism

Kovarski

Thillay

Houy‐Durand

et al. 2016

J Autism Dev Disord

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Autism spectrum disorder (ASD) is characterized by atypical visual perception both in the social and nonsocial domain. In order to measure a reliable visual response, visual evoked potentials were recorded during a passive pattern-reversal stimulation in adolescents and adults with and without ASD. While the present results show the same age-related changes in both autistic and non-autistic groups, they reveal a smaller P100 amplitude in the ASD group compared to controls. These results confirm that early visual responses are affected in ASD even with a simple, non social and passive stimulation and suggest that they should be considered in order to better understand higher-level processes.

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Early visual cortical responses produced by checkerboard pattern stimulation

Cited by 20 publications

References 38 publications

Human posterior parietal cortex responds to visual stimuli as early as peristriate occipital cortex

Human posterior parietal cortex responds to visual stimuli as early as peristriate occipital cortex

Faster than the brain’s speed of light: Retinocortical interactions differ in high frequency activity when processing darks and lights

Brief Report: Early VEPs to Pattern-Reversal in Adolescents and Adults with Autism

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