Eye muscle proprioceptive manipulation confirms spatial bias in visual attention towards the perceived direction of gaze
Daniela Balslev, William Newman, Paul Knox

Last modified: 2011-09-02

Abstract


Extraocular muscle (EOM) proprioception is thought to help locate visual stimuli relative to the head and body and thus assist visuomotor control. Because 1 Hz rTMS over EOM proprioceptive representation in somatosensory cortex causes not only error in visual localization (Balslev & Miall, 2008), but also a spatial bias in the accuracy of visual detection, it has recently been suggested that eye proprioception plays a role in visual attention (Balslev et al., 2011). The link between eye proprioception and visual attention is however indirect, e.g. the effect of S1-rTMS on visual attention could have been caused by a spread of current to adjacent parietal areas. Here we manipulated the EOM proprioceptive signal directly using passive eye rotation (Knox et al., 2000), which shifts perceived gaze direction of the contralateral eye in the direction of the rotation (Gauthier et al, 1990). Using a visual detection task we found that among retinally equidistant objects, those presented nearer the perceived direction of gaze were detected more accurately. Thus, in addition to its role in visuomotor control, eye proprioception is involved in the allocation of visual attention, facilitating the processing of objects located in the direction of gaze.

References


Balslev, D., Gowen, E., & Miall, R. C. (2011). Decreased visual attention further from the perceived direction of gaze for equidistant retinal targets. Journal of cognitive neuroscience, 23(3), 661-9. Balslev, D., & Miall, R. C. (2008). Eye position representation in human anterior parietal cortex. Journal of Neuroscience, 28, 8968-8972. Gauthier, G. M., Nommay, D., & Vercher, J. L. (1990). The role of ocular muscle proprioception in visual localization of targets. Science, 249(4964), 58-61. Knox, P. C., Weir, C. R., & Murphy, P. J. (2000). Modification of visually guided saccades by a nonvisual afferent feedback signal. Investigative Ophthalmology & Visual Science, 41(9), 2561-2565.

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