"Comparison Of Amplitude& Latency Of Auditory Middle Latency Responses In Congenitally Blind And Normally Sighted Subjects In The Range Of 14-20 Yrs. "

Background and Aim: Auditory and visual stimuli are the most important factors in communication. It seems during the brain maturation, decrease of visual inputs causes enhancement of somatosensory and auditory cortical responses. In this research latency and amplitude of auditory middle latency resp...

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Main Authors: Gh. Mohamad-khani, A. Molasadeghi, H. Majidi, Z. Jafari, S. Asadmalayeri, Sh. Jalaee
Format: Article
Language:fas
Published: Tehran University of Medical Sciences 2006-05-01
Series:Tehran University Medical Journal
Subjects:
Online Access:http://journals.tums.ac.ir/PdfMed.aspx?pdf_med=/upload_files/pdf/2602.pdf&manuscript_id=2602
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spelling doaj-89a68a5830324af5b36067b1849669582020-11-24T23:51:58ZfasTehran University of Medical SciencesTehran University Medical Journal1683-17641735-73222006-05-016414955"Comparison Of Amplitude& Latency Of Auditory Middle Latency Responses In Congenitally Blind And Normally Sighted Subjects In The Range Of 14-20 Yrs. "Gh. Mohamad-khaniA. MolasadeghiH. MajidiZ. JafariS. AsadmalayeriSh. JalaeeBackground and Aim: Auditory and visual stimuli are the most important factors in communication. It seems during the brain maturation, decrease of visual inputs causes enhancement of somatosensory and auditory cortical responses. In this research latency and amplitude of auditory middle latency responses (AMLR) are studied in blinds and normally sighted subjects. Materials and Methods: This descriptive-analytical study was performed on 40 congenitally blinds and 40 normally sighted subjects in the range of 14-20 years. All of cases had normal hearing sensitivity and acoustic reflexes without any middle ear disorders. The reason of this age range is the maturation of auditory middle latency responses. Sampling was randomized. Results: There was significant difference between amplitude of Na, Pa & Nb waves and latency of Na while no significant difference between latency of Pa & Nb in blinds and normally sighted subjects. Conclusion: Increase of amplitude and decrease of latency of AMLR in blind subjects were due to sensory compensation phenomenon, probably. It seems rate of processing and auditory perception in blinds is better than normally sighted subjects. http://journals.tums.ac.ir/PdfMed.aspx?pdf_med=/upload_files/pdf/2602.pdf&manuscript_id=2602auditory middle latency responses
collection DOAJ
language fas
format Article
sources DOAJ
author Gh. Mohamad-khani
A. Molasadeghi
H. Majidi
Z. Jafari
S. Asadmalayeri
Sh. Jalaee
spellingShingle Gh. Mohamad-khani
A. Molasadeghi
H. Majidi
Z. Jafari
S. Asadmalayeri
Sh. Jalaee
"Comparison Of Amplitude& Latency Of Auditory Middle Latency Responses In Congenitally Blind And Normally Sighted Subjects In The Range Of 14-20 Yrs. "
Tehran University Medical Journal
auditory middle latency responses
author_facet Gh. Mohamad-khani
A. Molasadeghi
H. Majidi
Z. Jafari
S. Asadmalayeri
Sh. Jalaee
author_sort Gh. Mohamad-khani
title "Comparison Of Amplitude& Latency Of Auditory Middle Latency Responses In Congenitally Blind And Normally Sighted Subjects In The Range Of 14-20 Yrs. "
title_short "Comparison Of Amplitude& Latency Of Auditory Middle Latency Responses In Congenitally Blind And Normally Sighted Subjects In The Range Of 14-20 Yrs. "
title_full "Comparison Of Amplitude& Latency Of Auditory Middle Latency Responses In Congenitally Blind And Normally Sighted Subjects In The Range Of 14-20 Yrs. "
title_fullStr "Comparison Of Amplitude& Latency Of Auditory Middle Latency Responses In Congenitally Blind And Normally Sighted Subjects In The Range Of 14-20 Yrs. "
title_full_unstemmed "Comparison Of Amplitude& Latency Of Auditory Middle Latency Responses In Congenitally Blind And Normally Sighted Subjects In The Range Of 14-20 Yrs. "
title_sort "comparison of amplitude& latency of auditory middle latency responses in congenitally blind and normally sighted subjects in the range of 14-20 yrs. "
publisher Tehran University of Medical Sciences
series Tehran University Medical Journal
issn 1683-1764
1735-7322
publishDate 2006-05-01
description Background and Aim: Auditory and visual stimuli are the most important factors in communication. It seems during the brain maturation, decrease of visual inputs causes enhancement of somatosensory and auditory cortical responses. In this research latency and amplitude of auditory middle latency responses (AMLR) are studied in blinds and normally sighted subjects. Materials and Methods: This descriptive-analytical study was performed on 40 congenitally blinds and 40 normally sighted subjects in the range of 14-20 years. All of cases had normal hearing sensitivity and acoustic reflexes without any middle ear disorders. The reason of this age range is the maturation of auditory middle latency responses. Sampling was randomized. Results: There was significant difference between amplitude of Na, Pa & Nb waves and latency of Na while no significant difference between latency of Pa & Nb in blinds and normally sighted subjects. Conclusion: Increase of amplitude and decrease of latency of AMLR in blind subjects were due to sensory compensation phenomenon, probably. It seems rate of processing and auditory perception in blinds is better than normally sighted subjects.
topic auditory middle latency responses
url http://journals.tums.ac.ir/PdfMed.aspx?pdf_med=/upload_files/pdf/2602.pdf&manuscript_id=2602
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