Note to users. If you're seeing this message, it means that your browser cannot find this page's style/presentation instructions -- or possibly that you are using a browser that does not support current Web standards. Find out more about why this message is appearing, and what you can do to make your experience of our site the best it can be.

Site Tools

  • AAAS
  • Subscribe
  • Feedback

Site Search

Search Advanced

Science 5 October 1990:
Vol. 250. no. 4977, pp. 118 - 121
DOI: 10.1126/science.2218503
Prev | Table of Contents | Next

Articles

Science, Vol 250, Issue 4977, 118-121
Copyright © 1990 by American Association for the Advancement of Science

articles

Extrageniculate vision in hemianopic humans: saccade inhibition by signals in the blind field

R Rafal, J Smith, J Krantz, A Cohen, and C Brennan

Department of Clinical Neurosciences, Brown University, Providence, RI 02908.

The functional competence of extrageniculate visual pathways in hemianopic humans was demonstrated by showing that distractor signals in the blind half of the visual field could inhibit saccades toward targets in the intact visual field. This inhibitory effect of unseen distractors in patients occurred only when distractors were presented in the temporal half of the visual field, was specific to oculomotor responses, and did not occur in normal subjects. These results show that a peripheral visual signal activates retinotectal pathways to prime the oculomotor system and that these pathways can mediate orienting behavior in hemianopic humans.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Striate Cortical Lesions Affect Deliberate Decision and Control of Saccade: Implication for Blindsight.
M. Yoshida, K. Takaura, R. Kato, T. Ikeda, and T. Isa (2008)
J. Neurosci. 28, 10517-10530
   Abstract »    Full Text »    PDF »
At the Edge of Consciousness: Automatic Motor Activation and Voluntary Control.
P. Sumner and M. Husain (2008)
Neuroscientist 14, 474-486
   Abstract »    PDF »
Naso-Temporal Asymmetry for Signals Invisible to the Retinotectal Pathway.
A. Bompas, T. Sterling, R. D. Rafal, and P. Sumner (2008)
J Neurophysiol 100, 412-421
   Abstract »    Full Text »    PDF »
Cross-modal localization in hemianopia: new insights on multisensory integration.
F. Leo, N. Bolognini, C. Passamonti, B. E. Stein, and E. Ladavas (2008)
Brain 131, 855-865
   Abstract »    Full Text »    PDF »
An Information-Theoretical Approach to Contextual Processing in the Human Brain: Evidence from Prefrontal Lesions.
F. Barcelo and R. T. Knight (2007)
Cereb Cortex 17, i51-i60
   Abstract »    Full Text »    PDF »
Visual fMRI Responses in Human Superior Colliculus Show a Temporal-Nasal Asymmetry That Is Absent in Lateral Geniculate and Visual Cortex.
R. Sylvester, O. Josephs, J. Driver, and G. Rees (2007)
J Neurophysiol 97, 1495-1502
   Abstract »    Full Text »    PDF »
Which Visual Pathways Cause Fixation-Related Inhibition?.
P. Sumner, P. Nachev, S. Castor-Perry, H. Isenman, and C. Kennard (2006)
J Neurophysiol 95, 1527-1536
   Abstract »    Full Text »    PDF »
Unconscious processing of orientation and color without primary visual cortex.
J. L. Boyer, S. Harrison, and T. Ro (2005)
PNAS 102, 16875-16879
   Abstract »    Full Text »    PDF »
Extrageniculate mediation of unconscious vision in transcranial magnetic stimulation-induced blindsight.
T. Ro, D. Shelton, O. L. Lee, and E. Chang (2004)
PNAS 101, 9933-9935
   Abstract »    Full Text »    PDF »
Effect of Remote Distractors on Saccade Programming: Evidence for an Extended Fixation Zone.
R. Walker, H. Deubel, W. X. Schneider, and J. M. Findlay (1997)
J Neurophysiol 78, 1108-1119
   Abstract »    Full Text »    PDF »
Residual vision in a scotoma: implications for blindsight.
R Fendrich, C. Wessinger, and M. Gazzaniga (1992)
Science 258, 1489-1491
   Abstract »    PDF »


To Advertise     Find Products

Science. ISSN 0036-8075 (print), 1095-9203 (online)