Influence of time post-onset of post-stroke aphasia and lesion size on the shift of auditory speech laterality in dichotic listening of C-V-C words

Introduction. Aphasia disorders are frequent consequences of vascular lesions of the brain. The study of ways and patterns of compensation for speech disorders, mechanisms of intra- and interhemispheric reorganization in speech disorders helps to develop a scientifically based methodology for aphasia rehabilitation. Aims. This study aims to identify the predominant vector of auditory-speech asymmetry in the dichotic listening task with c-v-c words among patients with post-stroke acoustic mnestic and efferent motor aphasia with different time post-onset and lesion size. Materials and methods. The dichotic listening task: 16 paired series of 4 c-v-c words in each series. Subjects: 110 post-stroke aphasia patients with different lesion sizes and time post-onset. Efferent motor aphasia (EM) - 57 patients, acoustic mnestic aphasia (AM) - 53 patients. Time post-onset: 31.5 months ± 28.5 months. The sign and the right ear scores (RES), the ratio of responses with the left and right ear advantage were employed. Statistical analysis: Mann-Whitney U-tests, Spearman's rank correlation, φ-criteria, ANOVA. All results were quoted as 2-tailed p-values with statistical significance set at p function show_eabstract() { $('#eabstract1').hide(); $('#eabstract2').show(); $('#eabstract_expand').hide(); }