Related Experiment Video
Updated: Jul 10, 2026
09:34
Structured Motor Rehabilitation After Selective Nerve Transfers
Published on: August 15, 2019
[Sensory loss and brain reorganization].
Madeleine Fortin1, Patrice Voss, Maryse Lassonde
1Centre de Recherche, Centre Hospitalier Universitaire Mère-Enfant (Sainte-Justine), Université de Montréal, CP 6128 - Succursale Centre-ville, Montréal (Québec), H3C 3J7Canada.
Medecine Sciences : M/S
|November 21, 2007
Summary
The brain
Area of Science:
- Neuroscience
- Sensory processing
- Brain plasticity
Context:
- Humans are primarily visual beings, with a significant portion of the brain dedicated to visual processing.
- Blindness, caused by conditions like glaucoma or retinal detachment, raises questions about the fate of these visual brain regions.
- Existing research suggests these areas may not become dormant but could be repurposed.
Purpose:
- To investigate the functional status of visual processing areas in the brain following blindness.
- To explore whether other sensory modalities can utilize these repurposed brain regions.
- To examine the correlation between sound localization abilities and brain activity in the occipital cortex of early blind individuals.
Summary:
- The occipital cortex, normally processing visual information, is actively recruited for non-visual tasks in congenitally blind individuals.
- Blind individuals exhibit enhanced auditory abilities, with sound localization performance linked to activity in visual brain areas.
- This functional reorganization demonstrates the brain's plasticity, allowing visual cortex to support other sensory processing.
Impact:
- Highlights the remarkable adaptability of the human brain in response to sensory loss.
- Provides evidence for cross-modal plasticity, where one sense compensates for another.
- Suggests potential avenues for therapeutic interventions aimed at enhancing function in individuals with blindness.
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