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The post-auricular muscle response: an objective electrophysiological method for evaluating hearing sensitivity

Post-auricular muscle responses (PAMRs) were recorded in sixteen adults with normal hearing and twenty adults with sensorineural hearing loss. Click stimuli were presented at 20 to 80 dB nHL via insert earphones. Only one ear was tested in hearing-impaired subjects, but normal-hearing subjects were...

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Published in:International journal of audiology 2005-11, Vol.44 (11), p.625-630
Main Authors: Purdy, Suzanne C., Agung, Katrina B., Hartley, David, Patuzzi, Robert B., O'Beirne, Greg A.
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container_issue 11
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Agung, Katrina B.
Hartley, David
Patuzzi, Robert B.
O'Beirne, Greg A.
description Post-auricular muscle responses (PAMRs) were recorded in sixteen adults with normal hearing and twenty adults with sensorineural hearing loss. Click stimuli were presented at 20 to 80 dB nHL via insert earphones. Only one ear was tested in hearing-impaired subjects, but normal-hearing subjects were tested monaurally and binaurally. PAMR amplitudes declined and latencies increased with decreasing click intensity. Both binaural stimulation and eye turn enhanced the PAMR. In hearing-impaired subjects, PAMR thresholds were correlated with audiometric thresholds for the eyes-turned condition. All normal-hearing subjects had PAMR when recording conditions were optimized and half had responses for the least optimal condition (20 dB nHL, monaural, eyes front). With eyes turned and monaural clicks at 35 dB nHL, the level widely used for infant hearing screening, most normal-hearing adults had a PAMR. Thus the PAMR is a robust response that may be a useful adjunct to ABR for objective hearing assessment. Sumario Las respuestas del músculo post-auricular (PAMR) fueron registradas en 16 adultos con audición normal y 20 adultos con hipoacusia sensorineural. Se presentaron estímulos con clics a 20 y 80 dB nHL por medio de auriculares de inserción. Solo se evaluó un oído en los hipoacúsicos pero los sujetos normales fueron evaluados mono y binauralmente. Las amplitudes del PAMR declinaron y las latencias aumentaron conforme la intensidad del clíc disminuyó. Tanto la estimulación binaural y el giro ocular aumentaron el PAMR. En hipoacusicos los umbrales PAMR se correlacionaron con los umbrales audiométricos en la condición de ojos girados. Todos los normales tuvieron PAMR cuando se optimizaron las condiciones de registro y la mitad tuvieron respuestas en la condición menos óptima (20 dB nHL, monoaural y con los ojos al frente). Con los ojos girados y con clics monoaurales en 35dB nHL, el nivel mas ampliamente usado para la identificación auditiva neonatal, la mayoría de los adultos con audición normal tuvieron PAMR. Por ello se considera que el PAMR es una respuesta robusta que puede ser un útil accesorio para las ABR en la evaluación objetiva de la audición.
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Click stimuli were presented at 20 to 80 dB nHL via insert earphones. Only one ear was tested in hearing-impaired subjects, but normal-hearing subjects were tested monaurally and binaurally. PAMR amplitudes declined and latencies increased with decreasing click intensity. Both binaural stimulation and eye turn enhanced the PAMR. In hearing-impaired subjects, PAMR thresholds were correlated with audiometric thresholds for the eyes-turned condition. All normal-hearing subjects had PAMR when recording conditions were optimized and half had responses for the least optimal condition (20 dB nHL, monaural, eyes front). With eyes turned and monaural clicks at 35 dB nHL, the level widely used for infant hearing screening, most normal-hearing adults had a PAMR. Thus the PAMR is a robust response that may be a useful adjunct to ABR for objective hearing assessment. Sumario Las respuestas del músculo post-auricular (PAMR) fueron registradas en 16 adultos con audición normal y 20 adultos con hipoacusia sensorineural. Se presentaron estímulos con clics a 20 y 80 dB nHL por medio de auriculares de inserción. Solo se evaluó un oído en los hipoacúsicos pero los sujetos normales fueron evaluados mono y binauralmente. Las amplitudes del PAMR declinaron y las latencias aumentaron conforme la intensidad del clíc disminuyó. Tanto la estimulación binaural y el giro ocular aumentaron el PAMR. En hipoacusicos los umbrales PAMR se correlacionaron con los umbrales audiométricos en la condición de ojos girados. Todos los normales tuvieron PAMR cuando se optimizaron las condiciones de registro y la mitad tuvieron respuestas en la condición menos óptima (20 dB nHL, monoaural y con los ojos al frente). Con los ojos girados y con clics monoaurales en 35dB nHL, el nivel mas ampliamente usado para la identificación auditiva neonatal, la mayoría de los adultos con audición normal tuvieron PAMR. 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Sumario Las respuestas del músculo post-auricular (PAMR) fueron registradas en 16 adultos con audición normal y 20 adultos con hipoacusia sensorineural. Se presentaron estímulos con clics a 20 y 80 dB nHL por medio de auriculares de inserción. Solo se evaluó un oído en los hipoacúsicos pero los sujetos normales fueron evaluados mono y binauralmente. Las amplitudes del PAMR declinaron y las latencias aumentaron conforme la intensidad del clíc disminuyó. Tanto la estimulación binaural y el giro ocular aumentaron el PAMR. En hipoacusicos los umbrales PAMR se correlacionaron con los umbrales audiométricos en la condición de ojos girados. Todos los normales tuvieron PAMR cuando se optimizaron las condiciones de registro y la mitad tuvieron respuestas en la condición menos óptima (20 dB nHL, monoaural y con los ojos al frente). Con los ojos girados y con clics monoaurales en 35dB nHL, el nivel mas ampliamente usado para la identificación auditiva neonatal, la mayoría de los adultos con audición normal tuvieron PAMR. 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Click stimuli were presented at 20 to 80 dB nHL via insert earphones. Only one ear was tested in hearing-impaired subjects, but normal-hearing subjects were tested monaurally and binaurally. PAMR amplitudes declined and latencies increased with decreasing click intensity. Both binaural stimulation and eye turn enhanced the PAMR. In hearing-impaired subjects, PAMR thresholds were correlated with audiometric thresholds for the eyes-turned condition. All normal-hearing subjects had PAMR when recording conditions were optimized and half had responses for the least optimal condition (20 dB nHL, monaural, eyes front). With eyes turned and monaural clicks at 35 dB nHL, the level widely used for infant hearing screening, most normal-hearing adults had a PAMR. Thus the PAMR is a robust response that may be a useful adjunct to ABR for objective hearing assessment. Sumario Las respuestas del músculo post-auricular (PAMR) fueron registradas en 16 adultos con audición normal y 20 adultos con hipoacusia sensorineural. Se presentaron estímulos con clics a 20 y 80 dB nHL por medio de auriculares de inserción. Solo se evaluó un oído en los hipoacúsicos pero los sujetos normales fueron evaluados mono y binauralmente. Las amplitudes del PAMR declinaron y las latencias aumentaron conforme la intensidad del clíc disminuyó. Tanto la estimulación binaural y el giro ocular aumentaron el PAMR. En hipoacusicos los umbrales PAMR se correlacionaron con los umbrales audiométricos en la condición de ojos girados. Todos los normales tuvieron PAMR cuando se optimizaron las condiciones de registro y la mitad tuvieron respuestas en la condición menos óptima (20 dB nHL, monoaural y con los ojos al frente). Con los ojos girados y con clics monoaurales en 35dB nHL, el nivel mas ampliamente usado para la identificación auditiva neonatal, la mayoría de los adultos con audición normal tuvieron PAMR. Por ello se considera que el PAMR es una respuesta robusta que puede ser un útil accesorio para las ABR en la evaluación objetiva de la audición.</abstract><cop>England</cop><pub>Informa UK Ltd</pub><pmid>16379490</pmid><doi>10.1080/14992020500266639</doi><tpages>6</tpages></addata></record>
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ispartof International journal of audiology, 2005-11, Vol.44 (11), p.625-630
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subjects Adolescent
Adult
Aged
Aged, 80 and over
Analysis of Variance
Auditory Threshold - physiology
Case-Control Studies
Electric Stimulation
Electromyography - methods
Electrophysiology
Female
Hearing Loss, Sensorineural - diagnosis
Humans
Male
Middle Aged
Muscle, Skeletal - physiology
Scalp
title The post-auricular muscle response: an objective electrophysiological method for evaluating hearing sensitivity
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