The paper reports findings derived from three experiments examining syntactic and morphosyntactic processing in individuals with agrammatic and logopenic variants of primary progressive aphasia (PPA-G and PPA-L, respectively) and stroke-induced agrammatic and anomic aphasia (StrAg and StrAn, respectively). We examined comprehension and production of canonical and noncanonical sentence structures and production of tensed and nontensed verb forms using constrained tasks in experiments 1 and 2, using the Northwestern Assessment of Verbs and Sentences (NAVS [57]) and the Northwestern Assessment of Verb Inflection (NAVI, Thompson and Lee, experimental version) test batteries, respectively. Experiment 3 examined free narrative samples, focusing on syntactic and morphosyntactic measures, i.e. production of grammatical sentences, noun to verb ratio, open-class to closed-class word production ratio, and the production of correctly inflected verbs. Results indicate that the two agrammatic groups (i.e., PPA-G and StrAg) pattern alike on syntactic and morphosyntactic measures, showing more impaired noncanonical compared to canonical sentence comprehension and production and greater difficulties producing tensed compared to nontensed verb forms. Their spontaneous speech also contained significantly fewer grammatical sentences and correctly inflected verbs, and they produced a greater proportion of nouns compared to verbs, than healthy speakers. In contrast, PPA-L and StrAn individuals did not display these deficits, and performed significantly better than the agrammatic groups on these measures. The findings suggest that agrammatism, whether induced by degenerative disease or stroke, is associated with characteristic deficits in syntactic and morphosyntactic processing. We therefore recommend that linguistically sophisticated tests and narrative analysis procedures be used to systematically evaluate the linguistic ability of individuals with PPA, contributing to our understanding of the language impairments of different PPA variants.

中文翻译：

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中风引起的和原发性进行性失语症的句法和形态句法处理。


该论文报告了三项实验的结果，这些实验检查了患有原发性进行性失语症（分别为 PPA-G 和 PPA-L）以及中风引起的语法障碍和失语症（分别为 StrAg 和 StrAn）的个体的句法和形态句法处理。 。我们使用实验 1 和实验 2 中的约束任务，使用西北动词和句子评估 (NAVS [57]) 和西北动词变形评估 (NAVS [57]) 来检查规范和非规范句子结构的理解和生成，以及时态和非时态动词形式的生成。 NAVI、Thompson 和 Lee，实验版）分别测试电池。实验3检查了自由叙事样本，重点关注句法和形态句法测量，即语法句子的产生、名词与动词的比例、开放类与封闭类单词产生的比率以及正确变形动词的产生。结果表明，两个语法组（即 PPA-G 和 StrAg）在句法和形态句法测量上的模式相似，与规范句子理解和生成相比，显示出更多的非规范句子理解和生成，并且与非时态动词形式相比，生成时态更加困难。与健康的说话者相比，他们的自发言语还包含明显更少的语法句子和正确变形的动词，并且与动词相比，他们产生的名词比例更大。相比之下，PPA-L 和 StrAn 个体没有表现出这些缺陷，并且在这些措施上的表现明显优于语法错误组。研究结果表明，语法错误，无论是由退行性疾病还是中风引起，都与句法和形态句法处理的特征缺陷有关。 因此，我们建议使用复杂的语言测试和叙述分析程序来系统地评估 PPA 个体的语言能力，有助于我们理解不同 PPA 变体的语言障碍。