Recruitment of occipital cortex during sensory substitution training linked to subjective experience of seeing in people with blindness.
Over three months of intensive training with a tactile stimulation device, 18 blind and 10 blindfolded seeing subjects improved in their ability to identify geometric figures by touch. Seven blind subjects spontaneously reported 'visual qualia', the subjective sensation of seeing flashes o...
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2011
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oai:doaj.org-article:05359dfe22d04a2893f0037499f97e692021-11-18T06:48:19ZRecruitment of occipital cortex during sensory substitution training linked to subjective experience of seeing in people with blindness.1932-620310.1371/journal.pone.0023264https://doaj.org/article/05359dfe22d04a2893f0037499f97e692011-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/21853098/?tool=EBIhttps://doaj.org/toc/1932-6203Over three months of intensive training with a tactile stimulation device, 18 blind and 10 blindfolded seeing subjects improved in their ability to identify geometric figures by touch. Seven blind subjects spontaneously reported 'visual qualia', the subjective sensation of seeing flashes of light congruent with tactile stimuli. In the latter subjects tactile stimulation evoked activation of occipital cortex on electroencephalography (EEG). None of the blind subjects who failed to experience visual qualia, despite identical tactile stimulation training, showed EEG recruitment of occipital cortex. None of the blindfolded seeing humans reported visual-like sensations during tactile stimulation. These findings support the notion that the conscious experience of seeing is linked to the activation of occipital brain regions in people with blindness. Moreover, the findings indicate that provision of visual information can be achieved through non-visual sensory modalities which may help to minimize the disability of blind individuals, affording them some degree of object recognition and navigation aid.Tomás OrtizJoaquín PochJuan M SantosCarmen RequenaAna M MartínezLaura Ortiz-TeránAgustín TurreroJuan BarciaRamón NogalesAgustín CalvoJosé M MartínezJosé L CórdobaAlvaro Pascual-LeonePublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 6, Iss 8, p e23264 (2011) |
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Medicine R Science Q |
| spellingShingle |
Medicine R Science Q Tomás Ortiz Joaquín Poch Juan M Santos Carmen Requena Ana M Martínez Laura Ortiz-Terán Agustín Turrero Juan Barcia Ramón Nogales Agustín Calvo José M Martínez José L Córdoba Alvaro Pascual-Leone Recruitment of occipital cortex during sensory substitution training linked to subjective experience of seeing in people with blindness. |
| description |
Over three months of intensive training with a tactile stimulation device, 18 blind and 10 blindfolded seeing subjects improved in their ability to identify geometric figures by touch. Seven blind subjects spontaneously reported 'visual qualia', the subjective sensation of seeing flashes of light congruent with tactile stimuli. In the latter subjects tactile stimulation evoked activation of occipital cortex on electroencephalography (EEG). None of the blind subjects who failed to experience visual qualia, despite identical tactile stimulation training, showed EEG recruitment of occipital cortex. None of the blindfolded seeing humans reported visual-like sensations during tactile stimulation. These findings support the notion that the conscious experience of seeing is linked to the activation of occipital brain regions in people with blindness. Moreover, the findings indicate that provision of visual information can be achieved through non-visual sensory modalities which may help to minimize the disability of blind individuals, affording them some degree of object recognition and navigation aid. |
| format |
article |
| author |
Tomás Ortiz Joaquín Poch Juan M Santos Carmen Requena Ana M Martínez Laura Ortiz-Terán Agustín Turrero Juan Barcia Ramón Nogales Agustín Calvo José M Martínez José L Córdoba Alvaro Pascual-Leone |
| author_facet |
Tomás Ortiz Joaquín Poch Juan M Santos Carmen Requena Ana M Martínez Laura Ortiz-Terán Agustín Turrero Juan Barcia Ramón Nogales Agustín Calvo José M Martínez José L Córdoba Alvaro Pascual-Leone |
| author_sort |
Tomás Ortiz |
| title |
Recruitment of occipital cortex during sensory substitution training linked to subjective experience of seeing in people with blindness. |
| title_short |
Recruitment of occipital cortex during sensory substitution training linked to subjective experience of seeing in people with blindness. |
| title_full |
Recruitment of occipital cortex during sensory substitution training linked to subjective experience of seeing in people with blindness. |
| title_fullStr |
Recruitment of occipital cortex during sensory substitution training linked to subjective experience of seeing in people with blindness. |
| title_full_unstemmed |
Recruitment of occipital cortex during sensory substitution training linked to subjective experience of seeing in people with blindness. |
| title_sort |
recruitment of occipital cortex during sensory substitution training linked to subjective experience of seeing in people with blindness. |
| publisher |
Public Library of Science (PLoS) |
| publishDate |
2011 |
| url |
https://doaj.org/article/05359dfe22d04a2893f0037499f97e69 |
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