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Cortical Deafness (Plus Other Central Hearing Disorders)
Published in Alexander R. Toftness, Incredible Consequences of Brain Injury, 2023
A person with auditory agnosia is still able to hear some sounds. However, the sounds that they hear become confusing and difficult to comprehend such that they don't know what the noises are. For example, they may have trouble recognizing the sound of a telephone (Hain, 2007). Or, the noise of their dog barking may suddenly sound different (Michel et al., 1980). One sound that someone with auditory agnosia may hear better than a person with cortical deafness is a pure tone—single, consistent sound waves—although not always for every possible tone (Poliva, 2014). Auditory agnosia and cortical deafness are similar enough that it is difficult to “choose one terminology over the other,” although in theory the underlying damage is different such that cortical deafness refers to more extensive brain damage (Michel et al., 1980, p. 368).
Pleasurable emotional response to music: A case of neurodegenerative generalized auditory agnosia
Published in Howard J. Rosen, Robert W. Levenson, Neurocase, 2020
Brandy R. Matthews, Chiung-Chih Chang, Mary De May, John Engstrom, Bruce L. Miller
A brief review of the nosology of auditory agnosia is pertinent to our description of this patient. Generalized auditory agnosia refers to a rare condition in which subjects demonstrate impairment in the ability to recognize sounds in spite of adequate hearing as measured by standard audiometry (Mendez, 2001). Bitemporal cortical lesions have been reported as the neuroanatomic substrate of the condition, most frequently as the result of cerebrovascular disease (Vignolo, 2003), but also in association with neurodegeneration (Pinard et al., 2002), herpes encephalitis (Kaga et al., 2003), and traumatic brain injury (Hattiangadi et al., 2005). Lesions with a similar distribution involving the primary auditory cortex (BA 41) and auditory association cortex (BA 42 & 22) bilaterally may also result in cortical deafness, a distinct condition that yields an abnormal pure tone audiogram and therefore impairs the perception of sounds preceding the assignment of their meanings (Mendez & Geehan, 1988; Szirmai et al., 2003).
Specific Synonyms
Published in Terence R. Anthoney, Neuroanatomy and the Neurologic Exam, 2017
Auditory agnosia for speech (Rowl. p. 11) Auditory form of sensory aphasia (Rowl, p, 9)Auditory receptive aphasia (DeJ, p. 656)Auditory verbal agnosia (T&D, p. 231)Word deafness (DeJ, p. 656)
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 –
Published in Acta Oto-Laryngologica, 2021
Ryohei Akiyoshi, Mitsuko Shindo, Kimitaka Kaga
Historically, the term of cortical deafness may have been first used by Henschen in 1918 [18]. It is often used interchangeably with central deafness and also may be synonymous with generalised auditory agnosia [19]. The term of auditory agnosia has been used to refer to a group of disorders marked by the patient’s inability to recognise auditorily presented sounds in the absence of any deficit in processing spoken language, though at times this is difficult to evaluate [20]. The term cortical deafness may lead to the misunderstanding that deafness is caused by damage of the auditory cortex only. We propose to name subcortical deafness as a subtype of auditory agnosia because the common sites of lesions suggest complete damage of bilateral subcortical areas including MGB in the ascending auditory pathway in our present cases or in cases previously reported, although the term cortical deafness was used because of the observation that the deafness was associated with damage of bilateral cortices.
EEG of patients in coma after traumatic brain injury reflects physical parameters of auditory stimulation but not its emotional content
Published in Brain Injury, 2019
Galina V. Portnova, Michael. S. Atanov
The previous data led us to suppose that patients in coma might respond to emotionally charged auditory stimulation, but this response would be different from that of conscious patients after TBI and healthy adults. There is a volume of literature showing that patients after mild or moderate TBI have some emotional impairment. For example, M. Lezak (6) described post-traumatic emotional changes in patients after TBI as an impaired capacity for social perceptiveness. Other consequences of TBI include personality changes such as a lack of emotional attachment and empathy, lack of warmth in social interactions, or chronic social and emotional deficits (7,8). Clinical research also reported symptoms of auditory agnosia, impaired interpretation of non-verbal communication and increased auditory processing time (9,10).
Central deafness: a review of past and current perspectives
Published in International Journal of Audiology, 2019
Frank E. Musiek, Gail D. Chermak, Barbara Cone
The term auditory agnosia has been used to refer to a group of disorders marked by the patient’s inability to recognise auditorily presented sounds in the absence of any deficit in processing spoken language, though at times this is difficult to evaluate (Poliva et al. 2015). Patients with auditory agnosia present marked deficits in auditory processing; however, generally, they present normal audiograms and usually, relatively normal hearing sensitivity (Rapin 1985). Like CD, when pure-tone hearing loss is observed, it is insufficient to account for the auditory deficits seen in cases of auditory agnosia.