Compensatory plasticity and cross-modal reorganization following early visual deprivation.
Level 5 - mechanism / opinion, no new human data
Narrative review synthesizing animal and human neuroimaging and behavioral literature without systematic methodology.
PubMed 23954750 · doi:10.1016/j.neubiorev.2013.08.001
What was done
The authors reviewed animal research, behavioral studies, and functional neuroimaging literature in sighted and blind human individuals. The review evaluates structural and functional reorganization occurring in the visually deprived cortex and other brain areas, along with behavioral adaptations in auditory and tactile domains.
What was found
The abstract provides no numerical data or effect sizes. It reports that visual deprivation induces widespread structural alterations, makes the visually deprived cortex responsive to non-visual sensory inputs and cognitive tasks, and is accompanied by enhanced behavioral acuity for auditory and tactile modalities.
Why it matters
Studying cross-modal plasticity in blindness provides insight into how sensory experience shapes functional brain architecture, defining the scope of human neuroplasticity and the mechanisms of conscious perception in the absence of vision.
Limits
As a narrative review, it lacks a systematic literature search, pre-specified study selection criteria, and quantitative meta-analytic pooling. The abstract does not provide sample sizes, quantitative estimates, or comparative metrics between early- and late-blind cohorts.
Cited by
- supports In individuals born blind, the visual cortex is repurposed for auditory, tactile, and memory processing, resulting in enhanced discrimination in hearing and touch.
- supports In individuals born blind, the visual cortex is repurposed for other sensory modalities, and in individuals born deaf, the auditory cortex is reassigned to other tasks.