期刊
JOURNAL OF COMPARATIVE NEUROLOGY
卷 527, 期 10, 页码 1675-1688出版社
WILEY
DOI: 10.1002/cne.24582
关键词
bilateral enucleates; marsupials; multisensory plasticity; RRID: AB_2187552; RRID: AB_477329; S1
资金
- James S. McDonnell Foundation [220020516]
- National Eye Institute [2T32EY015387NIH NEI R01EY022987]
Early loss of vision produces dramatic changes in the functional organization and connectivity of the neocortex in cortical areas that normally process visual inputs, such as the primary and second visual area. This loss also results in alterations in the size, functional organization, and neural response properties of the primary somatosensory area, S1. However, the anatomical substrate for these functional changes in S1 has never been described. In the present investigation, we quantified the cortical and subcortical connections of S1 in animals that were bilaterally enucleated very early in development, prior to the formation of retino-geniculate and thalamocortical pathways. We found that S1 receives dense inputs from novel cortical fields, and that the density of existing cortical and thalamocortical connections was altered. Our results demonstrate that sensory systems develop in tandem and that alterations in sensory input in one system can affect the connections and organization of other sensory systems. Thus, therapeutic intervention following early loss of vision should focus not only on restoring vision, but also on augmenting the natural plasticity of the spared systems.
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