Indian Journal of Physiology
and Pharmacology

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Volume 58 - Number 2 April - 2014 (Current issue) ISSN 0019-5499

Mid-latency Auditory Evoked Potential Response Revealed as an Evidence of Neural Plasticity in Blind Individuals

Anbarasi Muthusamy, Rajkumar Gajendran and Vishwanatha Rao B.


Abstract

There is a general impression that visually blind individuals show an exceptionally better perception of other sensory modalities such as hearing, touch and smell sensations. In this study, we intended to compare the mid-latency auditory evoked potential response (MLAEP) or Middle latency Response (MLR) to get an idea of the activity pattern of auditory thalamus and cortex between 30 visually handicapped subjects and 30 normal sighted subjects. The results showed a decrease in many of the MLR wave latencies, but highly significant for the wave Pa (P value <0.002). This fact can be reflected as an evidence of existence of crossmodal neuroplasticity. We also inferred that there are significant gender differences with latencies shorter in males than females (P value <0.02) in the blind subjects group which could be attributed to their rehabilitation training.

 

How to cite this article : Anbarasi Muthusamy, Rajkumar Gajendran and Vishwanatha Rao B. Mid-latency Auditory Evoked Potential Response Revealed as an Evidence of Neural Plasticity in Blind Individuals. Indian J Physiol Pharmacol 2014; 58(2) :