Bilateral long-range interaction between right and left visual hemifield.
Long-range interaction has been reported to be limited in space within a few degrees. Here, we present a new type of interaction by means of a bilateral configuration using two Gabor signals (GSs). Two horizontally oriented GSs, the first defined as a cue and the second as a probe, appeared in the right and left peripheral visual fields in mirror symmetrical regions. The detection threshold of the GS probe was found to decrease significantly up to cue-probe separations of 10 degrees tested. Since the interaction was sensitive to symmetrical locus, as well as specific to the direction of the horizontal axis, the results suggest novel long-range interaction extending toward the periphery with a mirror-symmetrical configuration. This may be acquired by neuronal communication, which directly connects bilateral receptive fields in the right and left visual cortices.
Tanaka
Yasuto
Y
Brain Information Group, National Institute of Information and Communications Technology (NICT), 588 Iwaoka-cho Iwaoka, Nishi-ku, Kobe 651-2492, Japan. ytanaka@po.nict.go.jp
Miyauchi
Satoru
S
Misaki
Masaya
M
D015350:Contrast Sensitivity; D003463:Cues; D004192:Discrimination, Psychological; D006801:Humans; D010775:Photic Stimulation / Q000379:methods; D011601:Psychophysics; D017603:Signal Detection, Psychological; D014794:Visual Fields; D014795:Visual Pathways / Q000502:physiology*