The averaged electrical responses to diffuse and to patterned light in the human☆
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2016, NeuroImageCitation Excerpt :The technique of choice for recording them has been electroencephalography (EEG) and the results obtained have also been used in more theoretical considerations about how the visual brain functions (Barnikol et al., 2006; Hatanaka et al., 1997; Kaneoke et al., 2005; Luck, 2005; Tobimatsu and Celesia, 2006). Since their discovery (Adrian and Mattews, 1934; Cobb and Dawson, 1960; Monnier, 1949; Spehlmann, 1965), it has been generally supposed that the initial stage of visual processing in cortex starts at around 100 ms after stimulus onset, although earlier latencies, in the 60–80 ms range have been given (Clark et al., 1995; Jeffreys and Axford, 1972a,b). The source of the earliest component of VEPs/VEFs has been usually estimated to be in V1 (Reviewed in Di Russo et al., 2002; Luck, 2005).
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2013, Brain and CognitionCitation Excerpt :Electrophysiologically, regardless of the ratio between the three groups of dots, the amplitude of the ERP wave between 80–130 ms after stimulus onset was modulated by the ordinal information (i.e., ordered vs. non-ordered stimuli) and showed a restricted parietal and lateral occipital distribution. Such timing and scalp distribution lead us to suggest that this early positive component is an ordinal related activation of P1 (Spehlmann, 1965). P1 is typically elicited by external stimuli that are strongly influenced by stimulus parameters, such as luminance, spatial frequency (e.g., Hansen, Jacques, Johnson, & Ellemberg, 2011) or depth (i.e., 2 vs. 3 dimensional stimuli; e.g., Omoto et al., 2010).
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Abridgement of thesis submitted to the Faculty of the Graduate School of the University of Minnesota in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Physiology. Part of the results has been published in an abstract (Spehlmann 1963).
This investigation was supported in part by Research Grant NB 03225 from the National Institutes of Health, Public Health Service.
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Present address: VA Research Hospital, 333 E. Huron Street, Chicago, Ill. 60611.