Long Latency Responses in Children with Learning Disorder (Pages 103-110)
Shivraj Bhimte1 and R. Rangasayee2
1Ali Yavar Jung National Institute for Hearing Handicapped Mumbai 50, India; 2Dr. S. R. Chandrasekhar Institute of Speech and Hearing, Hennur Road, Bangalore- 560084 India
DOI: http://dx.doi.org/10.12970/2311-1917.2015.03.02.7
Abstract: The purpose of the study was to investigate long latency response from the children with LD and compare the findings with controlled subjects (i.e. age-gender matched). LLR responses were recorded from 30 subjects with LD (experimental group) and 30 control groups, age range from 10 -14 year with means age of 11.2 years.
The LLR responses were recorded by using the click stimulus. P1, N1, P2, N2 latency and amplitude were used for analysis. Result of the study indicates that both the group had statistically significant difference in latency.
P1 and N1 amplitude were found to be significantly different between the two test groups. The present study findings suggest that click evoked auditory late latency response is easily traceable in all children with LD and typically developing children. However, prolonged latency responses in the present study suggest that the auditory stimulus processing at auditory cortex level is different in LD children compared to typical children.
This functioning difference in the auditory cortical area results in altered auditory cortical recording. The present study has discussed how LLR test can be effective test tool to use clinically that differentiates between individuals with and without LD.
Keywords: Evoked potential, LLR, Normal Hearing, Learning disorder. Read more