STUDY OF NEURAL PLASTICITY IN BRAILLE READING VISUALLY CHALLENGED INDIVIDUALS
Journal Title: International Journal of Medical Research & Health Sciences (IJMRHS) - Year 2014, Vol 3, Issue 1
Abstract
Background: Neural plasticity includes a wide range of adaptive changes due to loss or absence of a particular sense. Cortical mapping or reorganization is evolutionary conserved mechanism which involves either an unmasking of previously silent connections and/or sprouting of new neural elements. Aims & Objectives -To compare the Somatosensory evoked potentials (SSEPs) wave form in normal and visually challenged individuals. Materials & Methods: 20 visually challenged males in the age group of 21 -31 yrs were included in the study along with 20 age & sex matched individuals. Subjects were screened for general physical health to rule out any medical disorder, tactile sensibility i.e., sensation of light touch, pressure, tactile localization & discrimination to rule out any delay in the peripheral conduction disorder. Somatosensory evoked potentials were recorded on Nicolet Viking select neuro diagnostic system version 10.0.The placement of electrodes & recording of potentials were done based on methodology in chiappa. Data was subjected to various statistical analyses using SPSS version 17.0 software. N20 & P25 latencies were shorter and amplitudes were larger in visually challenged individuals compared to age & sex matched individuals. Conclusions: In visually challenged individuals, decrease in latencies indicate greatly improved of information in the nervous system & increase in amplitudes indicate the extent and synchronization of neural network involved in processing of vision.
Authors and Affiliations
Nikhat Yasmeen| Department of Physiology, Shadan Institute of Medical Sciences, Hyderabad, Andhrapradesh, India, Corresponding author mail: yasmeen78692@yahoo.com, Mohammed Muslaiuddin Khalid| Department of Emergency Medicine, Care Hospital, Hyderabad, Andhra Pradesh, India, Abdul Raoof Omer siddique| Department of Physiology, Shadan Institute of Medical Sciences, Hyderabad, Andhrapradesh, India, Madhuri Taranikanti| Department of Physiology, Shadan Institute of Medical Sciences, Hyderabad, Andhrapradesh, India, Sanghamitra Panda| Department of Physiology, Shadan Institute of Medical Sciences, Hyderabad, Andhrapradesh, India, D. Usha Rani| Department of Physiology, Apollo Institute of Medical Sciences & Research, Hyderabad,Andhra Pradesh, India
Keywords
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