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SIMPLE REACTION TIMES TO LATERALIZED LIGHT FLASHES: VARIETIES OF INTERHEMISPHERIC COMMUNICATION ROUTES
Abstract
Simple unimanual reaction times to lateralized light flashes were measured in 40 normal subjects, 4 commissurotomized patients, and a boy with callosal agenesis. In all subjects, reaction times tended to be shorter when the stimuli were presented on the same side as the response hand (uncrossed condition) than on the opposite side (crossed condition). In 2 experiments, the magnitude of the crossed-uncrossed difference (CUD) was greatest in the commissurotimized patients (ranging from 35 to 96 ms), the acallosal boy showed an intermediate CUD (20 and 12 ms for the first and second experiment, respectively), and normal subjects exhibited the smallest CUD (an insignificant 1 ms difference and a significant 3 ms difference in the first and second experiment, respectively). For all subjects, reaction times increased when the stimulus light intensity was decreased (Experiment 1) or when stimulus eccentricity was increased (Experiment 2). However, the effects of these visual parameters on the CUD revealed group and individual differences. Neither stimulus light intensity nor eccentricity affected the CUD in the normals, in 1 of the commissurotomized patients, and in the acallosal boy. The CUDs in these subjects are attributed to the transfer of nonsensory information via the corpus callosum, via ipsilateral corticospinal tracts, and via the anterior commissure or ipsilateral motor pathways, respectively. The CUDs of 2 commissurotomized patients varied with stimulus eccentricity but…
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“SRTs are slightly faster to stimuli that are delivered to the visual field contralateral to the hand used in responding, which directly activates the hemisphere controlling motor responses, and therefore avoids the additional delay associated with callosal transmission (Clarke and Zaidel, 1989; Bisiacchi et al., 1994; Brizzolara et al., 1994; Chaumillon et al., 2014).”
From Factors influencing the latency of simple reaction time (2015) · cites this paper as Clarke and Zaidel, 1989
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Factors influencing the latency of simple reaction time
Woods, D. L., Wyma, J. M., Yund, E. W., Herron, T. J., & Reed, B. (2015) · Frontiers in Human Neuroscience · doi:10.3389/fnhum.2015.00131 · Cited by 336
“…contralateral to the hand used in responding, which directly activates the hemisphere controlling motor responses, and therefore avoids the additional delay associated with callosal transmission (Clarke and Zaidel, 1989; Bisiacchi et al., 1994; Brizzolara et al., 1994; Chaumillon et al., 2014).”
BackgroundSchulte, T., Sullivan, E. V., Müller-Oehring, E. M., Adalsteinsson, E., & Pfefferbaum, A. (2005) · Cerebral Cortex · doi:10.1093/cercor/bhi020 · Cited by 275
Residual functional connectivity in the split-brain revealed with resting-state functional MRI
Uddin, L. Q., Mooshagian, E., Zaidel, E., Scheres, A., Margulies, D. S., Kelly, A. M. C., Shehzad, Z., Adelstein, J. S., Castellanos, F. X., Biswal, B. B., et al. (2008) · NeuroReport · doi:10.1097/wnr.0b013e3282fb8203 · Cited by 170
Split-brain: what we know now and why this is important for understanding consciousness
de Haan, E. H. F., Corballis, P. M., Hillyard, S. A., Marzi, C. A., Seth, A., Lamme, V. A. F., Volz, L., Fabri, M., Schechter, E., Bayne, T., et al. (2020) · Neuropsychology Review · doi:10.1007/s11065-020-09439-3 · Cited by 86
Metadata
- Authors
- CLARKE, J. M., & ZAIDEL, E.
- Affiliations
- University of California, Los Angeles (US)
- Corresponding author
- CLARKE, JEFFREY M.
- Venue
- Brain
- Publisher
- Oxford University Press (OUP)
- Published
- 1989
- Volume
- 112
- Issue
- 4
- Pages
- 849-870
- ISSN
- 0006-8950 (ISSN-L)
- 1460-2156
- OpenAlex
- W1566126182
- Cited by
- 130
- References
- 0
- Citations by year
- 2026: 1 · 2023: 2 · 2022: 5 · 2021: 2 · 2020: 1 · 2019: 2 · 2018: 3 · 2017: 2 · 2016: 1 · 2015: 5 · 2014: 2 · 2012: 2
- FWCI
- 2.48
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Brain (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Institute of Mental Health (MH 00179)
- National Institute of Neurological Disorders and Stroke (NS 20187)
- Topics
- Life Sciences › Neuroscience › Cognitive Neuroscience › Visual perception and processing mechanisms
- Life Sciences › Neuroscience › Cognitive Neuroscience › Hemispheric Asymmetry in Neuroscience
- Life Sciences › Neuroscience › Cognitive Neuroscience › Motor Control and Adaptation
- Keywords
- interhemispheric transfer, corpus callosum, callosal agenesis, reaction time, stimulus eccentricity, stimulus intensity, anterior commissure, corticospinal tract, hemispheric lateralization, information processing model
- MeSH terms
- Brain, Child, Female, Humans, Male, Photic Stimulation, Postoperative Period, Reaction Time, Reference Values, Agenesis of Corpus Callosum
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