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Spectrum of neuropsychiatric symptoms in chronic post-stroke aphasia
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In: World J Psychiatry (2022)
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Case Report: Barely Able to Speak, Can’t Stop Echoing: Echolalic Dynamic Aphasia in Progressive Supranuclear Palsy
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In: Front Aging Neurosci (2021)
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Pharmacotherapy of Traumatic Childhood Aphasia: Beneficial Effects of Donepezil Alone and Combined With Intensive Naming Therapy
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In: Front Pharmacol (2020)
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Developmental Dynamic Dysphasia: Are Bilateral Brain Abnormalities a Signature of Inefficient Neural Plasticity?
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From dysfunctional to extraordinary verbal repetition abilities: clinical implications and neural features
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Is the emergence of speech errors in chronic post-stroke aphasia a result of ongoing compensatory brain plasticity mechanisms?
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Abstract:
Traditional descriptions of aphasia have ascribed language disturbances to tissue damage but symptoms expressed as repetitive verbal behaviors such as echolalia, perseverations and so forth, cannot emanate from fully dysfunctional. We propose that in aphasia, repetitive verbal behaviors (such as conduite d’approche (CdA) and mitigated echolalia (ME)) may be compensatory behaviors emerging from ongoing plastic changes occurring in the preserved tissue. CdA is the repetitive and self-initiated approximation to a target word during spontaneous speech or naming tasks. ME refers to the echoing of a just heard sentence introducing a subtle change. At brain level, language deficits usually result from lesions affecting the dorsal and the ventral streams. Damage to the main dorsal pathway is related to deficits in verbal repetition and fluency, while lesions affecting the ventral pathway are related to comprehension deficits. Thus, we propose that ME may emerge from spared dorsal stream when the ventral system is compromised, while CdA may result as an attemp of the ventral stream to compensate dorsal damage. In this study we analysed three cases of aphasia at linguistic and structural (MRI and PET) levels. In patient 1, speech was predominantly characterized by instances of CdA, patient 2 presented predominantly ME instances, and patient 3 had both CdA and ME. Results showed that patient 1 had a disconnection pattern that greatly overlapped with the dorsal language pathway, while patient 2 ́s lesion location bisected the ventral pathway discontinuing the projection of fibers that run through it. Patient 3 presented a disconnection pattern in-between the two previous ones. These findings suggest that symptoms as CdA and ME, that frequently appear in the chronic stage of aphasia may represent the behavioral expression of plastic changes occurring within the preserved language network in an attempt to compensate the linguistic functions associated to the damaged pathway. ; Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech.
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Keyword:
Afasia; Aphasia; compensation; echolalia; language recovery; Neuroplasticidad; neuroplasticity; repetition
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URL: https://hdl.handle.net/10630/20628
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Neural signatures of treatment-induced benefits in apathy and depression amongst persons with aphasia
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Towards a tailored approach to neuroplasticity enhancement based on brain and behavioral predictors of language learning success
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Beneficial effects of pharmacological treatment in post-stroke dynamic aphasia: a behavioural and neuroimaging study
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| 11 |
Ecolalia mitigada y conducta de aproximación: plasticidad compensatoria en los circuitos cerebrales de lenguaje
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Aphasia with anatomical isolation of the language area: A reanalysis on the light of modern neuroimaging techniques
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A reappraisal of echolalia in aphasia: A case-series study with multimodal neuroimaging
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Overrepresentation of verbal repetition deficits in aphasic men with stroke: A systematic literature review and meta-analysis
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Mild Developmental Foreign Accent Syndrome and Psychiatric Comorbidity: Altered White Matter Integrity in Speech and Emotion Regulation Networks
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Relación entre déficits lingüísticos y atencionales en personas con afasia post-ictus: el papel de la modulación colinérgica
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Loss of regional accent after damage to the speech production network
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| 18 |
Repeating with the right hemisphere: reduced interactions between phonological and lexical-semantic systems in crossed aphasia?
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Dissociated repetition deficits in aphasia can reflect flexible interactions between left dorsal and ventral streams and gender-dimorphic architecture of the right dorsal stream
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