Subcortical deafness as a subtype of auditory agnosia after injury of bilateral auditory radiations caused by two cerebrovascular accidents - normal auditory brainstem responses with I-VII waves and abolished consciousness of hearing.
Acta Otolaryngol
; 141(4): 374-380, 2021 Apr.
Article
em En
| MEDLINE
| ID: mdl-33573440
ABSTRACT
BACKGROUND:
In central auditory disorders caused by damage of the cerebral hemispheres, there are cortical deafness and auditory agnosia. Although clinical cases of cortical deafness have been reported, little is known about the hearing problems and localized lesions associated with cortical deafness. AIMS/OBJECTIVES:
The aims of our research are to elucidate lesion sites associated with cortical deafness and to clarify why patients with cerebral lesions are not aware of any sound at all. MATERIALS ANDMETHODS:
Three patients diagnosed as having total loss of hearing participated in this study. We conducted pure-tone audiometry, speech audiometry, distortion product otoacoustic emission (DPOAE), auditory brainstem response (ABR), and brain magnetic resonance imaging (MRI) to diagnose cortical deafness with aphasia tests of these patients.RESULTS:
Our studies showed that waves VI and VII as well as waves I to V have normal peak latencies in ABRs in all three patients. In brain MRI, we found complete damage of proximal parts of bilateral auditory radiations in the three patients.CONCLUSIONS:
We propose 'subcortical deafness' as a subtype of auditory agnosia.Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Potenciais Evocados Auditivos do Tronco Encefálico
/
Agnosia
/
Acidente Vascular Cerebral Hemorrágico
/
Perda Auditiva Central
Idioma:
En
Ano de publicação:
2021
Tipo de documento:
Article