Paper Information

Title: 

POSTURAL CONTROL EVALUATION BY RECORDING SACCULAR RESPONSE IN CONGENITAL PROFOUND HEARING IMPAIRED CHILDREN

Type: PAPER
Author(s): JAFARI ZAHRA,MALAYERI S.,REZAZADEH N.
 
 
 
Name of Seminar: INTERNATIONAL CONNGRESS OF IRANIAN SOCIETY OF OTOLARYNGYOLOGY / HEAD AND NECK SURGERY
Type of Seminar:  CONGRESS
Sponsor: 
Date:  2010Volume 1
 
 
Abstract: 

BACKGROUND: VESTIBULAR EVOKED MYOGENIC POTENTIALS (VEMP) IS A TEST OF SACCULAR FUNCTION. STUDIES SHOWED A DECREASE OF VEMP RECORDING WITH AN INCREASE OF SENSORY-NEURAL HEARING LOSS. OUR STUDY WAS DONE TO DETERMINE THE PERCENTAGE OF VEMP EXISTENCE AND TO EVALUATE SACCULAR FUNCTION IN CHILDREN WITH CONGENITAL SENSORY-NEURAL HEARING LOSS.
METHODS: THIRTY CHILDREN (14 GIRLS AND 16 BOYS) WITH BILATERAL CONGENITAL SENSORY-NEURAL HEARING LOSS WERE STUDIED. CHILDREN WITH VISUAL IMPAIRMENT, MENTAL DISORDERS AND/OR LEARNING DIFFICULTIES WERE EXCLUDED FROM THE STUDY. AFTER CONDUCTING ROMBERG AND DISDIADOCHOKINESIA AS TWO SCREENING TESTS OF BALANCE DISORDERS, VEMP WAS RECORDED MONAURALLY WITH 500-HZ-TONE BURST STIMULI VIA AIR CONDUCTION AND AN INSERT RECEIVE.
RESULTS: ALL CHILDREN PASSED THE ROMBERG AND DISDIADOCHOKINESIA SCREENING TESTS. VEMP WAS RECORDED FROM 53.3% OF THE CHILDREN WITH A MEAN THRESHOLD INTENSITY LEVEL OF 83.60
±44.4 DB HL (RANGE: 75 TO 95 DB HL). REPEATING THE TEST IN SUPRA THRESHOLD LEVEL REVEALED A SIGNIFICANT INCREASE OF P1N1 AMPLITUDE (P<0.001). EAR SIDE AND SEX HAD NO EFFECT ON VEMP RECORDING OR THE LATENCY OF P1 AND N1 WAVES AND P1N1 AMPLITUDE. IN FOUR COCHLEAR IMPLANTED CHILDREN VEMP WAS NOT RECORDED. MOTOR DELAY AND DEVELOPMENTAL DISORDERS WERE REPORTED IN NEONATAL HISTORY OF EIGHT CHILDREN, SIX OF WHOM HAD NO VEMP.
CONCLUSION: ABOUT FIFTY PERCENT OF OUR CHILDREN HAD NO VEMP THAT COULD RESULT FROM SACCULAR DISORDER AND IMPAIRMENT OF POSTURAL CONTROL AND STATIC BALANCE. VEMP IS A RATHER SHORT, NON-INVASIVE AND ACCESSIBLE TEST THAT CAN BE USED FOR THE IDENTIFICATION OF VESTIBULAR AND POSTURAL DISORDERS. THE RESULTS OF THIS TEST ACCOMPANIED WITH THE BEHAVIORAL EVALUATION OF THE BALANCE FUNCTION CAN BE USED FOR REHABILITATION CONSULTATIONS AND THE DESIGN OF THERAPEUTIC APPROACHES.

 
Keyword(s): VEMP, PROFOUND HEARING LOSS, SACCULE, BALANCE DISORDER, COCHLEAR IMPLANT
 
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