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. 2017 Apr 11:9:98.
doi: 10.3389/fnagi.2017.00098. eCollection 2017.

The Treatment Based on Temporal Information Processing Reduces Speech Comprehension Deficits in Aphasic Subjects

Aneta Szymaszek  1   2 , Tomasz Wolak  1   3 , Elzbieta Szelag  1   2
Affiliations

The Treatment Based on Temporal Information Processing Reduces Speech Comprehension Deficits in Aphasic Subjects

Aneta Szymaszek et al. Front Aging Neurosci. .

Abstract

Experimental studies have reported a close association between temporal information processing (TIP) and language comprehension. Brain-injured subjects with aphasia show disturbed TIP which was evidenced in elevated temporal order threshold (TOT) as compared to control subjects. The present study is aimed at improving auditory speech comprehension in aphasic subjects using a specific temporal treatment. Fourteen patients having deficits in both speech comprehension and TIP were tested. The Token Test, phoneme discrimination tests (PDT) and Voice-Onset-Time (VOT) Test were employed to assess speech comprehension. The TOT was measured using two 10 ms tones (400 Hz, 3000 Hz) presented binaurally. The patients participated in eight 45-min sessions of either the specific temporal treatment (n = 7) aimed at improving the perception of sequencing abilities, or in a non-temporal control treatment (n = 7) on volume discrimination. The temporal treatment yielded an improvement in TIP. Moreover, a transfer of improvement from the time domain to the language domain was observed. The control treatment did not improve either TIP or speech comprehension in any of the applied tests.

Keywords: aphasia; phoneme discrimination; speech comprehension; stroke; temporal information processing; temporal treatment.

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Figures

Figure 1
Figure 1
The summarized lesioned areas in patients included into EXP group (A) and CON group (B).
Figure 2
Figure 2
The scheme of the experimental protocol.
Figure 3
Figure 3
Percentage of differences in the level of a baseline vs. post-treatment performance (baseline—post-treatment/baseline * 100%) for particular tasks in EXP (red bar) and CON (blue bar). The 0 point reflects a stable performance (no difference between a baseline vs. post-treatment performance). Positive values (right side from the 0 point) correspond to improved performance. No worsened performance (left side from the 0 point) was observed. Significant differences (p < 0.05) are indicated by asterisks.
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