Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

LSVT eila ppt

658 views

Published on

Research Findings- LSVT

  • Be the first to comment

  • Be the first to like this

LSVT eila ppt

  1. 1. Changes in Vocal Loudness Following LSVT <ul><li>Ramig, Sapir, and Countryman (2001) compared changes in vocal loudness following LSVT </li></ul><ul><li>Purpose - investigate whether extraneous factors are responsible for the improvement in the voice and speech of individuals who received LSVT – expected fluctuation of voice symptoms with the course of PD, and familiarity with testing procedures </li></ul><ul><li>Increased loudness = a positive treatment outcome </li></ul><ul><li>Hypothesis- if increased intensity is measured in patients who received LSVT, but is not in the untreated groups, then this change is more likely to be treatment-related. </li></ul>
  2. 2. Participants, Study design and method <ul><li>3 groups: </li></ul><ul><li>14 participants with PD-received LSVT </li></ul><ul><li>14 participants with PD –no treatmt </li></ul><ul><li>14 neurologically normal (NN) </li></ul><ul><li>treatment protocol in the study followed the known LSVT protocol </li></ul><ul><li>SPL of four different speech tasks were recorded: </li></ul><ul><li>(1) six repetitions of sustained phonation of the vowel “ah” </li></ul><ul><li> (2) reading of the “Rainbow Passage” </li></ul><ul><li>(3) a free-topic monologue </li></ul><ul><li>(4) description of the “Cookie Theft Picture” </li></ul><ul><li>Three recording intervals: before the PD group commenced therapy, immediately after the treatment period, and six months after the treatment for the PD group had ended. </li></ul>
  3. 3. Results and Conclusion <ul><li>Results indicated a significant increase in SPL from baseline to post-treatment measurements in the PD group that received LSVT. </li></ul><ul><li>When compared to the NN group, participants in the LSVT group demonstrated post-treatment a significantly higher SPL for the sustained vowel and the reading tasks. </li></ul><ul><li>Significantly higher SPL for all tasks six months post treatment for the LSVT group when compared to the PD group that did not received treatment. </li></ul><ul><li>The participants in the two untreated groups maintained a relatively stable SPL throughout the measurement intervals. </li></ul><ul><li>Conclusion- the significant increase in SPL for the LSVT group, together with the relatively stable SPL that was measured for the untreated participants, indicate that the increase in SPL is treatment-specific </li></ul>
  4. 4. Changes in Vowel Articulation Following LSVT <ul><li>Sapir, Spielman, Ramig, Story, and Fox (2007) investigated changes in vowel articulation following LSVT </li></ul><ul><li>Purpose- investigate the relationship between improvement in speech clarity and intelligibility following LSVT and articulatory movements. </li></ul><ul><li>Hypothesis- LSVT influences the movement of the articulators which leads to improvement in speech clarity and intelligibility </li></ul><ul><li>The researchers measured: </li></ul><ul><ul><li>Changes in the first and second formants (F1 and F2) of vowels- have great importance in the perception of vowels </li></ul></ul><ul><ul><li>The ratio F2i/F2u as a measurement of changes in articulatory function </li></ul></ul><ul><ul><li>Changes in vowel triangle area (VTA) - vowels in dysarthric speech tend to become centralized due to limited movement of the articulators, individuals with PD will show a greater VTA post-LSVT. </li></ul></ul><ul><ul><li>perceptual component- compared listeners’ ratings of “vowel goodness” before and after LSVT- the quality of the vowels produced by PD participants would be considered as poor pre-treatment, and so improvement in vowel articulation post-LSVT will result in the listener perceiving vowel productions following LSVT as better. </li></ul></ul>
  5. 5. Participants, Research Design and Method <ul><li>3 groups: </li></ul><ul><li>14 participants with PD-received LSVT </li></ul><ul><li>15 participants with PD –no treatment </li></ul><ul><li>14 neurologically normal (NN) </li></ul><ul><li>Treatment protocol in the study followed the known LSVT protocol </li></ul><ul><li>The researchers measured vocal on three different days before the onset of treatment for the treatment group, and on two different days immediately following the termination of LSVT. </li></ul><ul><li>participants read 3 phrases and the vowel in one word from each of these phrases (‘key’, ‘stew’, and ‘Bobby’) was used for analysis : /i/, /u/, and /a/. </li></ul>
  6. 6. Results and Conclusion <ul><li>Results indicated changes in the means F2u, F2i/F2u, SPLi, SPLu, and SPLa only in the treatment group </li></ul><ul><li>These changes included increase in vocal SPL, and a change in the values of F2u and F2i/F2u towards the values of the healthy participants </li></ul><ul><li>Perceptual vowel ratings - the post treatment vowels that were produced by the LSVT group were rated as better than those produced pretreatment </li></ul><ul><li>A correlation between changes in “vowel goodness” ratings and changes in the acoustic variables before and after treatment= improvement in SPL and change toward normal values of vowel acoustics correlated with post treatment vowels being rated as better. </li></ul><ul><li>Conclusion- in the lack of change in the control group and the positive changes in the treatment group, the effects observed in the treatment group are treatment-specific. </li></ul><ul><li>Explaining the results- deficits in facial muscle activity were minimized as a result of LSVT and effected the change in F2u values. The authors also suggest that LSVT could have improved the range of tongue movement, which was exhibited by F2u changes. </li></ul>

×