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Original Article

Does cognitive function in older adults with hearing impairment improve by hearing aid use?

, , , , , & show all
Pages 265-271 | Received 03 Jun 2004, Published online: 07 Jul 2009
 

Abstract

In the present study, the effects of hearing aid use by hearing-impaired older individuals on different aspects of cognitive function, such as memory, attention, executive functioning, and processing speed, were investigated. Fifty-six participants (mean age = 72.5) who were fitted with hearing aids were compared with 46 control participants (mean age = 74.5) with an equivalent hearing impairment, but who were not fitted with a hearing aid. After a dual baseline measurement and fitting of the hearing aids, all participants were assessed again with neurocognitive tests after 12 months. While the participants with hearing aids had improved aided hearing thresholds, they did not demonstrate an improved performance on the cognitive tests compared to the controls. Thus improved hearing did not improve cognitive functioning. These findings may suggest that hearing aid use only restores impairments at the level of the sensory organ, but does not affect the central nervous system and, as a consequence, cognitive functioning.

¿La función cognitiva en adultos mayores hipoacúsicos mejora con el uso de auxiliares auditivos?

Sumario

En el presente estudio se investigaron los efectos del uso de auxiliares auditivos en adultos mayores hipoacúsicos, en diferentes funciones cognitivas como la memoria, la atención, el funcionamiento ejecutivo y la velocidad de procesamiento. 56 participantes (edad promedio = 72.5) con auxiliares auditivos adaptados, se compararon con 46 participantes de un grupo control (edad promedio = 74.5) que tenían impedimentos auditivos equivalentes pero sin habérseles adaptado auxiliares auditivos. Después de una medición basal doble y de la adaptación de auxiliares auditivos, todos los participantes fueron evaluados de nuevo doce meses después con pruebas neurocognitivas. Mientras que los participantes con auxiliares auditivos mejoraron sus umbrales con amplificación, no demostraron un rendimiento mejor en las pruebas cognitivas en comparación con los del grupo control. Por lo tanto, la mejor audición no mejora el funcionamiento cognitivo. Estos hallazgos pueden sugerir que el uso de auxiliares auditivos solamente revierte los impedimentos a nivel del órgano sensorial, pero no afecta al sistema nervioso central y, en consecuencia, al funcionamiento cognitivo.

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