Visual Evoked Potentials: Normative Values and Gender Differences

Sharma, Ritu; Joshi, Sandeep; Singh, Karuna; Kumar, Avnish

doi:10.7860/jcdr/2015/12764.6181

Cited by 60 publications

(70 citation statements)

References 15 publications

(1 reference statement)

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“…The time windows of these two components are fairly congruent with previous "brain microstate" EEG studies on action processing, which identified periods of stability in the brain activity between roughly 0 and 120-ms over the visual cortex and between roughly 120 and 200-ms over the posterior temporal and inferior parietal cortices 16,17 . The P100 component is routinely used in ophthalmology to evaluate the integrity of the visual cortices 44,45 , and the N170 has been shown to be particularly sensitive to inversion effects (comparison between upright/upside-down pictures) of body parts and, to a lesser extent, of objects 42,46 . Both components have been linked to the activity of the visual cortices, the P100 being generated by the primary visual cortex, and the N170 by the associative visual cortices at the border of the temporal and parietal cortices 42 .…”

Section: Discussionmentioning

confidence: 99%

Neural dynamics of grip and goal integration during the processing of others’ actions with objects: An ERP study

Decroix

Roger

Kalénine

2020

Sci Rep

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Recent behavioural evidence suggests that when processing others' actions, motor acts and goalrelated information both contribute to action recognition. Yet the neuronal mechanisms underlying the dynamic integration of the two action dimensions remain unclear. this study aims to elucidate the eRp components underlying the processing and integration of grip and goal-related information. the electrophysiological activity of 28 adults was recorded during the processing of object-directed action photographs (e.g., writing with pencil) containing either grip violations (e.g. upright pencil grasped with atypical-grip), goal violations (e.g., upside-down pencil grasped with typical-grip), both grip and goal violations (e.g., upside-down pencil grasped with atypical-grip), or no violations. participants judged whether actions were overall typical or not according to object typical use. Brain activity was sensitive to the congruency between grip and goal information on the N400, reflecting the semantic integration between the two dimensions. On earlier components, brain activity was affected by grip and goal typicality independently. Critically, goal typicality but not grip typicality affected brain activity on the N300, supporting an earlier role of goal-related representations in action recognition. Findings provide new insights on the neural temporal dynamics of the integration of motor acts and goal-related information during the processing of others' actions.Understanding the actions performed by others is a core ability of human beings 1,2 . Yet, actions are no mere movements but organised and goal-directed movements 3,4 . Thus, understanding others' actions does not only imply the processing of the motor act (e.g., both dynamic and static components of reaching and grasping a bottle) but also the recognition of the actor's goal (e.g., to drink or to move it away). Accordingly, observers mainly perceive others' actions in terms of goals 5-8 and may use different sources of information to this end (e.g., dynamic and static component of the motor act 9 ; functional knowledge about objects 10 ; contextual information 11,12 , among others). Although numerous studies have demonstrated that both information about the motor act and information about the goal of the actor are processed during the decoding of others' actions, the precise role of the two types of information in action recognition remains debated.Important theoretical accounts have highlighted the need to consider the processing of others' actions as a dynamic phenomenon 3,13-15 that cannot be fully uncovered without considering the temporal dynamics of motor acts and action goal decoding. The observation of several successive periods of stability in the brain activity (i.e. "micro-state") when visually processing others' actions 16,17 further supports the idea that the decoding of others' actions is a multistep process. In a recent behavioural experiment, we also demonstrated that the involvement of action goal and static motor act information in action recog...

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Section: Discussionmentioning

confidence: 99%

Neural dynamics of grip and goal integration during the processing of others’ actions with objects: An ERP study

Decroix

Roger

Kalénine

2020

Sci Rep

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“…The PRVEP is a visual system test, and amplitudes may be affected by a variety of technical and/or subject-related factors, that is, gender, VA and pupillary size 22. The apparently similar VAs between the study and control groups might suggest possible affection of optic tract or visual cortex; however, it might also be attributed to existing papillary RNFL thickness differences which may be underestimated by the small sample size.…”

Section: Discussionmentioning

confidence: 99%

Electrophysiological changes in 12-year-old children born MLP: reduced VEP amplitude in MLP children

et al. 2017

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“…Visual evoked potentials (VEPs), which contain characteristic components (peaks and troughs within a voltage waveform), are routinely used to measure brain responses to visual stimulation by electroencephalography (EEG). VEP studies have shown that early components (e.g., P50, N70, and P100) have higher amplitudes (La Marche et al, ; Celesia et al, ; Mitchell et al, ; Shibata et al, ; Sharma et al, ) and/or shorter latencies (Stockard et al, ; Celesia et al, ; Emmerson‐Hanover et al, ; Shibata et al, ; Malcolm et al, ; Langrova et al, ; Proverbio et al, ; Sharma et al, ) in females compared with males (but see Grabowska et al, ). There is evidence that the properties of these VEP components are related to contrast sensitivity (discussed earlier) performance (Allen et al, ; Norcia et al, ; Souza et al, ), although the sex differences seen in these studies may have been secondary to underlying anatomical differences (Christie and McBrearty, ; Dekaban and Sadowsky, ; Reilly et al, ; Allison et al, ).…”

Section: Sex Differences In Basic Visual Processingmentioning

confidence: 99%

Sex differences in the human visual system

Vanston

Strother

2016

J of Neuroscience Research

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This Mini-Review summarizes a wide range of sex differences in the human visual system, with a primary focus on sex differences in visual perception and its neural basis. We highlight sex differences in both basic and high-level visual processing, with evidence from behavioral, neurophysiological, and neuroimaging studies. We argue that sex differences in human visual processing, no matter how small or subtle, support the view that females and males truly see the world differently. We acknowledge some of the controversy regarding sex differences in human vision and propose that such controversy should be interpreted as a source of motivation for continued efforts to assess the validity and reliability of published sex differences and for continued research on sex differences in human vision and the nervous system in general. V C 2016 Wiley Periodicals, Inc.

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Visual Evoked Potentials: Normative Values and Gender Differences

Cited by 60 publications

References 15 publications

Neural dynamics of grip and goal integration during the processing of others’ actions with objects: An ERP study

Neural dynamics of grip and goal integration during the processing of others’ actions with objects: An ERP study

Electrophysiological changes in 12-year-old children born MLP: reduced VEP amplitude in MLP children

Sex differences in the human visual system

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