Auclair-Ouellet Noémie, Pythoud Pauline, Koenig-Bruhin Monica, Fossard Marion
McGill University, Canada.
Université de Neuchâtel, Switzerland.
Lang Speech. 2019 Jun;62(2):250-259. doi: 10.1177/0023830918765897. Epub 2018 Mar 26.
Inflectional morphology difficulties are typically reported in non-fluent aphasia with agrammatism, but a growing number of studies show that they can also be present in fluent aphasia. In agrammatism, morphological difficulties are conceived as the consequence of impaired phonological encoding and would affect regular verbs more than irregular verbs. However, studies show that inflectional morphology difficulties concern both regular and irregular verbs, and that their origin could be more conceptual/semantic in nature. Additionally, studies report more pronounced impairments for the processing of the past tense compared to other tenses. The goal of this study was to characterize the impairment of inflectional morphology in fluent aphasia. RY, a 69-year-old man with chronic fluent aphasia completed a short neuropsychological and language battery and three experimental tasks of inflectional morphology. The tasks assessed the capacity to select the correct inflected form of a verb based on time information, to access the time information included in an inflectional morpheme, and to produce verbs with tense inflection. His performance was compared to a group of five adults without language impairments. Results showed that RY had difficulties selecting the correct inflected form of a verb, accessing time information transmitted by inflectional morphemes, and producing inflected verbs. His difficulties affected both regular and irregular verbs, and verbs in the present, past, and future tenses. The performance also shows the influence of processing limitations over the production and comprehension of inflectional morphology. More studies of inflectional morphology in fluent aphasia are needed to understand the origin of difficulties.
曲折形态学困难通常在伴有语法缺失的非流利性失语症中被报道，但越来越多的研究表明，它们也可能存在于流利性失语症中。在语法缺失中，形态学困难被认为是语音编码受损的结果，并且对规则动词的影响会大于不规则动词。然而，研究表明，曲折形态学困难涉及规则动词和不规则动词两者，并且其根源在本质上可能更多是概念性/语义性的。此外，研究报告称，与其他时态相比，过去时的加工存在更明显的损伤。本研究的目的是描述流利性失语症中曲折形态学的损伤情况。RY是一名69岁患有慢性流利性失语症的男性，他完成了一项简短的神经心理学和语言测试组，以及三项曲折形态学的实验任务。这些任务评估了根据时间信息选择动词正确曲折形式的能力、获取曲折语素中包含的时间信息的能力，以及产出带有时态曲折的动词的能力。将他的表现与一组五名无语言损伤的成年人进行了比较。结果显示，RY在选择动词的正确曲折形式、获取由曲折语素传递的时间信息以及产出曲折动词方面存在困难。他的困难影响了规则动词和不规则动词，以及现在时、过去时和将来时的动词。该表现还显示了加工限制对曲折形态学产出和理解的影响。需要更多关于流利性失语症中曲折形态学的研究来了解困难的根源。
