Lateral bracing of the tongue during the onset phase of alveolar stops: an EPG study

Tonguedness in speech: Lateral bias in lingual bracing

This study examines the lateral biases in tongue movements during speech production. It builds on previous research on asymmetry in various aspects of human biology and behavior, focusing on the tongue's asymmetric behavior during speech. The findings reveal that speakers have a pronounced preference toward one side of the tongue during lateral releases with a majority displaying the left-side bias. This lateral bias in tongue speech movements is referred to as tonguedness. This research contributes to our understanding of the articulatory mechanisms involved in tongue movements and underscores the importance of considering lateral biases in speech production research.

Electropalatography and its correlation to tongue movement ultrasonography in speech analysis

Purpose

To analyze the use of electropalatography and ultrasonography regarding speech therapy through literature narrative review.

Research strategies

A literature review was conducted at PubMed and Scielo databases, using descriptors as electropalatography, electropalatography AND evaluation, electropalatography AND therapy, electropalatography AND ultrasonography, electropalatography AND speech.

Selection criteria

The research criteria selected in the database were: studies in the past five years and studies in humans. In the pre-selection, studies that were duplicate, not fully available, and have shown no direct relation with electropalatography in speech-language therapy were discarded.

Data analysis

Data analysis was performed descriptively, following subdivisions: title, area, year, subject, implementation, and conclusion of the study.

Results

Twenty one papers were selected, eight of them using the term electropalatography, two with the keywords electropalatography AND evaluation, six with the keywords electropalatography AND therapy, three of them with the keywords electropalatography AND ultrasonography, and two papers with the keywords electropalatography AND speech.

Conclusion

Different types of research involving the use of electropalatography in the field of speech-language therapy were found and analyzed. Few researches have concomitantly used electropalatography and ultrasonography.