Unseen Stimuli Modulate Conscious Visual Experience

Evidence from Inter-hemispheric Summation

B. de Gelder, G.R.C. Pourtois, M. van Raamsdonk, J. Vroomen, L. Weiskrantz

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Abstract

Emotional facial expression can be discriminated despite extensive lesions of striate cortex. Here we report differential performance with recognition of facial stimuli in the intact visual field depending on simultaneous presentation of congruent or incongruent stimuli in the blind field. Three experiments were based on inter-hemispheric summation. Redundant stimulation in the blind field led to shorter latencies for stimulus detection in the intact field. Recognition of the expression of a half-face expression in the intact field was faster when the other half of the face presented to the blind field had a congruent expression. Finally, responses to the expression of whole faces to the intact field were delayed for incongruent facial expressions presented in the blind field. These results indicate that the neuro-anatomical pathways (extra-striate cortical and sub-cortical) sustaining inter-hemispheric summation can operate in the absence of striate cortex.
Original languageEnglish
Pages (from-to)385-391
JournalNeuroreport
Volume12
Issue number2
Publication statusPublished - 2001

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Facial Expression
Visual Cortex
Visual Fields
Recognition (Psychology)

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de Gelder, B. ; Pourtois, G.R.C. ; van Raamsdonk, M. ; Vroomen, J. ; Weiskrantz, L. / Unseen Stimuli Modulate Conscious Visual Experience : Evidence from Inter-hemispheric Summation. In: Neuroreport. 2001 ; Vol. 12, No. 2. pp. 385-391.
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de Gelder, B, Pourtois, GRC, van Raamsdonk, M, Vroomen, J & Weiskrantz, L 2001, 'Unseen Stimuli Modulate Conscious Visual Experience: Evidence from Inter-hemispheric Summation', Neuroreport, vol. 12, no. 2, pp. 385-391.

Unseen Stimuli Modulate Conscious Visual Experience : Evidence from Inter-hemispheric Summation. / de Gelder, B.; Pourtois, G.R.C.; van Raamsdonk, M.; Vroomen, J.; Weiskrantz, L.

In: Neuroreport, Vol. 12, No. 2, 2001, p. 385-391.

Research output: Contribution to journalArticleScientificpeer-review

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