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Related Experiment Video

Updated: Jun 21, 2026

Transplantation into the Anterior Chamber of the Eye for Longitudinal, Non-invasive In vivo Imaging with Single-cell Resolution in Real-time

Transplantation into the Anterior Chamber of the Eye for Longitudinal, Non-invasive In vivo Imaging with Single-cell Resolution in Real-time

Published on: March 10, 2013

Numbers in the blind's "eye".

Elena Salillas¹, Alessia Graná, Radouane El-Yagoubi

¹Department of Biology, University of Texas at San Antonio, San Antonio, Texas, USA. Elena.Salillas@utsa.edu

|July 24, 2009

Summary

Blind individuals show similar number representations but distinct brain responses compared to sighted people. This suggests differences in how non-visual spatial information is processed in the blind brain.

Area of Science:

Neuroscience
Cognitive Psychology
Sensory Processing

Background:

The blind demonstrate comparable performance to sighted individuals in numerical tasks, even without visual experience.
The Spatial-Numerical Association of Response Codes (SNARC) effect, a spatial representation of numbers, is observed in the blind via auditory tasks.

Purpose of the Study:

To investigate the neural processing of spatial numerical representations in the blind.
To compare electrophysiological correlates of numerical processing between blind and sighted individuals.

Main Methods:

Electrophysiological recordings were used to measure brain activity.
Participants (blind and sighted) performed numerical tasks presented in the auditory modality.

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Last Updated: Jun 21, 2026

Transplantation into the Anterior Chamber of the Eye for Longitudinal, Non-invasive In vivo Imaging with Single-cell Resolution in Real-time

Transplantation into the Anterior Chamber of the Eye for Longitudinal, Non-invasive In vivo Imaging with Single-cell Resolution in Real-time

Published on: March 10, 2013

In Vivo Confocal Microscopy: A Standard Operating Procedure for the Detection of Demodex Mites at the Eyelid Margin

In Vivo Confocal Microscopy: A Standard Operating Procedure for the Detection of Demodex Mites at the Eyelid Margin

Published on: July 3, 2025

Main Results:

Both blind and sighted individuals exhibit similarly organized numerical representations.
Attentional shifts triggered by numbers show different electrophysiological patterns: sensorial N100 in the sighted and cognitive P300 in the blind.

Conclusions:

The findings suggest distinct neural mechanisms underlying the use of spatial representations in the blind.
This highlights potential differences in processing non-visual spatial information in the blind population.