Auditory Processing after Early Left Hemisphere Injury: A Case Report

Abstract

Few studies have addressed the long-term outcomes of early brain injury, especially after hemorrhagic stroke. This is the first study to report a case of acquired auditory processing disorder in a 10-year-old child who had a severe left hemorrhagic cerebral infarction at 13 months of age, compromising nearly all of the left temporal lobe. This case, therefore, is an excellent and rare opportunity to investigate the presence of neural plasticity of central auditory system in a developing brain followed severe brain damage. After assuring normal functioning of the peripheral auditory system, a series of behavioral auditory processing tests was applied in dichotic and monaural listening conditions and with verbal and non-verbal stimuli. For all verbal dichotic tasks (dichotic digits, competing words, and sentences tests), good performance on the left ear, especially for Dichotic digits test (100%), and zero performance on the right ear were observed. For monaural low-redundancy tests, the patient also exhibited good performance for auditory figure-ground and time-compressed sentences tests in the left ear. In the right ear, a very poor performance was observed, but slightly better than the same in Dichotic tasks. Impaired performance was also observed in the LiSN test in terms of spatial advantage and, for the Pitch Pattern Sequence test, the only non-verbal test applied, the patient had performance within the normal range in both ears. These results are interpreted taking into consideration the anatomical location of stroke lesion and also the influence of hemispheric specialization for language on auditory processing performance.

The Role of Physiological Responses in a VR-Based Sound Localization Task

“…• spelling and reading difficulties. CAPD may be a result of a post-traumatic brain injury [30], stroke [9], ASD or due to other congenital reasons [31]. Tests designed to evaluate this condition assess the brain's ability to process audio with multiple concurrent auditory events [32].…”

Letter to the Editor: An Affront to Scientific Inquiry Re: Moore, D. R. (2018) Editorial: Auditory Processing Disorder, Ear Hear, 39, 617–620

“…Bocca et al provided indisputable evidence for the neurological origins of APD and established the cornerstone upon which APD is diagnosed today. The neurological subtypes of APD have since been extensively documented (see for example Griffiths et al 2012;Bamiou et al 2012;Grube et al 2016;Koohi et al 2017;Murphy et al 2017;Polanski et al 2017;Harris and Dubno 2017;Szymaszek et al 2017;Iliadou and Eleftheriadis 2017;Durante et al 2018). Moreover, Boscariol and colleagues have demonstrated using neuroimaging that children with perisylvian polymicrogyria, which are indicative of functional cortical abnormalities, present with APD.…”

Acidente vascular cerebral em crianças e adolescentes: análise dos resultados obtidos na avaliação eletrofisiológica e comportamental do processamento auditivo

“…As diferenças foram significativas entre os grupos. Os poucos estudos já realizados com crianças e adolescentes diagnosticadas com AVC relataram um comprometimento das habilidades auditivas (Elias et al, 2013;Murphy et al, 2017). Alterações contralaterais à lesão hemisférica, como as descritas nesta pesquisa, estão em conformidade com alguns estudos (Bellis, 2011;Elias et al 2013Elias et al , 2014Murphy et al, 2017).…”

“…Os poucos estudos já realizados com crianças e adolescentes diagnosticadas com AVC relataram um comprometimento das habilidades auditivas (Elias et al, 2013;Murphy et al, 2017). Alterações contralaterais à lesão hemisférica, como as descritas nesta pesquisa, estão em conformidade com alguns estudos (Bellis, 2011;Elias et al 2013Elias et al , 2014Murphy et al, 2017). O lobo temporal pode ser considerado como multissensorial, por interligar vias neurais auditivas, sensórias, visuais e límbicas, resultando continuadamente a atividades ligadas a elaboração de memória, perspectiva auditiva e perspectiva visual.…”

“…Os resultados do estudo de Murphy et al (2017) envolvendo uma criança de 10 anos, com histórico de AVC, que apresentou lesão de lobo temporal esquerdo, mostraram desempenho satisfatório para a orelha esquerda e baixo desempenho para orelha direita em todas as avaliações de testes verbais. Uma vez que o sítio da lesão identificado pelos autores citados é o mesmo daquele verificado na maioria dos participantes deste estudo e, ainda, que os resultados auferidos são similares, podemos inferir que a plasticidade cerebral permite a reorganização e o desenvolvimento da linguagem no hemisfério direito como resposta compensatória à lesão.…”