The time course and location of cerebral evoked activity associated with the processing of colour stimuli in man

Plendl, H.; Paulus, Walter; Roberts, I.G.; Bötzel, Kai; Towell, Anthony; Pitman, J.R.; Scherg, Michael; Halliday, A. M.

doi:10.1016/0304-3940(93)90095-3

Cited by 24 publications

(11 citation statements)

References 26 publications

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“…The location of these occipital activations is also consistent with studies of color perception using electrophysiological recordings (Allison et al, 1993;Buchner, Weyen, Frackowiak, Romaya, & Zeki, 1994;Plendl et al, 1993), PET (Corbetta et al, 1991;Zeki et al, 1991) and functional magnetic resonance imaging (Clark et al, 1997;Sakai et al, 1995). Having successfully identi ed regions of the occipital cortex associated with color perception, we next examined whether these regions were also active when subjects retrieved previously acquired information about colors.…”

Section: Color Perceptionsupporting

confidence: 73%

Cortical Regions Associated with Perceiving, Naming, and Knowing about Colors

Chao

Martin

1999

Journal of Cognitive Neuroscience

229

131

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Positron emission tomography (PET) was used to investigate whether retrieving information about a specific object attribute requires reactivation of brain areas that mediate perception of that attribute. During separate PET scans, subjects passively viewed colored and equiluminant gray-scale Mondrians, named colored and achromatic objects, named the color of colored objects, and generated color names associated with achromatic objects. Color perception was associated with activations in the lingual and fusiform gyri of the occipital lobes, consistent with previous neuroimaging and human lesion studies. Retrieving information about object color (generating color names for achromatic objects relative to naming achromatic objects) activated the left inferior temporal, left frontal, and left posterior parietal cortices, replicating previous findings from this laboratory. When subjects generated color names for achromatic objects relative to the low-level baseline of viewing gray-scale Mondrians, additional activations in the left fusiform/lateral occipital region were detected. However, these activations were lateral to the occipital regions associated with color perception and identical to occipital regions activated when subjects simply named achromatic objects relative to the same low-level baseline. This suggests that the occipital activations associated with retrieving color information were due to the perception of object form rather than to the top-down influence of brain areas that mediate color perception. Taken together, these results indicate that retrieving previously acquired information about an object's typical color does not require reactivation of brain regions that subserve color perception.

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Section: Color Perceptionsupporting

confidence: 73%

Cortical Regions Associated with Perceiving, Naming, and Knowing about Colors

Chao

Martin

1999

Journal of Cognitive Neuroscience

229

131

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“…VEF waveforms for the left and right quadrant conditions are shown separately in Figure 3). The former probably corresponds to the classical N75 or / and P100 response to visual stimuli, while the latter replicates the late responses to colour stimuli reported by others (Plendl et al, 1993;Kuriki et al, 2005). The polarities of the M100 and M170 responses are opposite between the two presentation quadrants (lower left and right).…”

Section: Data Quality Checksupporting

confidence: 85%

“…This relatively new information about the organization of visual pathways to the cerebral cortex raises interesting questions about how the visual brain operates (see Zeki, 2016) but it leaves out of account another cardinal visual attribute, namely colour and whether signals related to it too can access the visual brain at early time frames through direct inputs as well as through ones relaying through V1. Previous studies have shown that the earliest responses to colour stimuli have a range of 72-120 ms (Paulus et al, 1984;Plendl et al, 1993;Schmolesky et al, 1998;Kuriki et al, 2005;Amano et al, 2006), considerably later than the responses elicited by form and motion stimuli (ffytche et al, 1995;Shigihara & Zeki, 2013Shigihara et al, 2016). Given the early responses (at less than 50 ms) detected in LGN and in prestriate visual areas, we were interested to re-examine the time course of visual cortical responses to the viewing of coloured stimuli and to learn whether they, too, can be detected at early time windows, of 25-50 ms.…”

Section: Introductionmentioning

confidence: 99%

Very Early Responses to Colour Stimuli Detected in Prestriate Visual Cortex by Magnetoencephalography (MEG)

Shigihara

Hoshi

Zeki

2017

Preprint

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Key points summary・ We measured visual evoked responses to colour stimuli using magnetoencephalography.・ An early response was identified, at around 30 ms after stimulation.・ The sources of the response were estimated to be in prestriate cortex.・ Colour signals thus appear to evoke very early cortical responses, just like form and motion signals. 3 AbstractPrevious studies with the visual motion and form systems show that visual stimuli belonging to these categories trigger much earlier latency responses from the visual cortex than previously supposed and that the source of the earliest signals can be located in either the prestriate cortex or in both the striate (V1) and prestriate cortex. This is consistent with the known anatomical connections since, in addition to the classical retino-geniculo-striate cortex input, there are direct anatomical inputs from both the lateral geniculate nucleus and the pulvinar that reach the prestriate visual cortex without passing through V1. In pursuing our studies, we thought it especially interesting to study another cardinal visual attribute, namely colour, to learn whether colour stimuli also provoke very early responses, at less than 50 ms, from visual cortex. To address the question, we asked participants to view stimuli that changed in colour and used magneto-encephalography to detect very early responses (< 50 ms) in the occipital visual cortex. Our results show that coloured stimuli also provoke an early cortical response (M30), with an average peak time at 30.8 ms, thus bringing the colour system into line with the visual motion and form systems. We conclude that colour signals reach visual cortex, including prestriate visual cortex, earlier than previously supposed. 4

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“…Our tasks used green/blue color stimuli so that the processing of chromatic information, which occurs primarily in the V4 area, was also required (Lueck et al, 1989; Plendl et al, 1993; Murphey et al, 2008). Additional studies are necessary to fully understand the neuronal processes underlying the P300 paradigm with green/blue color flickering stimuli; however, this study suggests the importance of posterior and lateral (right or left) channel sets in the operation of an AR–BMI with both an HMD and LCD display.…”

Section: Discussionmentioning

confidence: 99%

Towards Intelligent Environments: An Augmented Reality–Brain–Machine Interface Operated with a See-Through Head-Mount Display

2011

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The brain–machine interface (BMI) or brain–computer interface is a new interface technology that uses neurophysiological signals from the brain to control external machines or computers. This technology is expected to support daily activities, especially for persons with disabilities. To expand the range of activities enabled by this type of interface, here, we added augmented reality (AR) to a P300-based BMI. In this new system, we used a see-through head-mount display (HMD) to create control panels with flicker visual stimuli to support the user in areas close to controllable devices. When the attached camera detects an AR marker, the position and orientation of the marker are calculated, and the control panel for the pre-assigned appliance is created by the AR system and superimposed on the HMD. The participants were required to control system-compatible devices, and they successfully operated them without significant training. Online performance with the HMD was not different from that using an LCD monitor. Posterior and lateral (right or left) channel selections contributed to operation of the AR–BMI with both the HMD and LCD monitor. Our results indicate that AR–BMI systems operated with a see-through HMD may be useful in building advanced intelligent environments.

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The time course and location of cerebral evoked activity associated with the processing of colour stimuli in man

Cited by 24 publications

References 26 publications

Cortical Regions Associated with Perceiving, Naming, and Knowing about Colors

Cortical Regions Associated with Perceiving, Naming, and Knowing about Colors

Very Early Responses to Colour Stimuli Detected in Prestriate Visual Cortex by Magnetoencephalography (MEG)

Towards Intelligent Environments: An Augmented Reality–Brain–Machine Interface Operated with a See-Through Head-Mount Display

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