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For cortical areas deprived of their normal sensory input, numerous studies have shown that the lesioned modality is replaced by that of the intact sensory modalities through a process termed crossmodal plasticity. In contrast, little is known about the effects of loss of a particular sensory modality on the cortical representations of the remaining, intact sensory modalities. In the present study, an area of extrastriate visual cortex from early\u2010deaf adult cats was examined for features of dendritic plasticity known to occur after early\u2010deafness. Using light\u2010microscopy of Golgi\u2010stained pyramidal neurons from the posterolateral lateral suprasylvian (PLLS) cortex, dendritic spine density significantly increased (~19%), while spine head size was slightly but significantly decreased (~9%) following early hearing loss. Curiously, these changes were not localized to regions of the visual PLLS known to receive auditory inputs, but instead showed a broad pattern more reflective of the distribution of the area's visual features. Whereas hearing loss results in crossmodal plasticity in auditory cortices, the same peripheral lesion can also induce intramodal plasticity within representations of the intact sensory systems that may also contribute to supranormal performance.<\/jats:p>","DOI":"10.1111\/ejn.15104","type":"journal-article","created":{"date-parts":[[2021,1,2]],"date-time":"2021-01-02T10:47:00Z","timestamp":1609584420000},"page":"1950-1960","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Early hearing loss induces plasticity within extra\u2010striate visual cortex"],"prefix":"10.1111","volume":"53","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-8081-6901","authenticated-orcid":false,"given":"M. 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