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Audiovisual association learning in the absence of primary visual cortex

Seirafi, Mehrdad
De Weerd, Peter
de Gelder, Beatrice
Published in Frontiers in Human Neuroscience. 2015, vol. 9, no. 686, p. 1-6
Abstract Learning audiovisual associations is mediated by the primary cortical areas; however, recent animal studies suggest that such learning can take place even in the absence of the primary visual cortex. Other studies have demonstrated the involvement of extra-geniculate pathways and especially the superior colliculus (SC) in audiovisual association learning. Here, we investigated such learning in a rare human patient with complete loss of the bilateral striate cortex. We carried out an implicit audiovisual association learning task with two different colors of red and purple (the latter color known to minimally activate the extra-genicular pathway). Interestingly, the patient learned the association between an auditory cue and a visual stimulus only when the unseen visual stimulus was red, but not when it was purple. The current study presents the first evidence showing the possibility of audiovisual association learning in humans with lesioned striate cortex. Furthermore, in line with animal studies, it supports an important role for the SC in audiovisual associative learning.
Keywords Audiovisual learningBlindsightSuperior colliculus
PMID: 26778999
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Article (Published version) (980 Kb) - public document Free access
Research group Neuropsychologie expérimentale
Projects FP7: TANGO
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SEIRAFI, Mehrdad et al. Audiovisual association learning in the absence of primary visual cortex. In: Frontiers in Human Neuroscience, 2015, vol. 9, n° 686, p. 1-6. doi: 10.3389/fnhum.2015.00686 https://archive-ouverte.unige.ch/unige:81899

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Deposited on : 2016-03-15

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