Phonatory characteristics of Parkinsonian speech before and after morning medication: the ON and OFF states

Goberman, Alexander M.; Coelho, Carl; Robb, Michael P.

doi:10.1016/s0021-9924(01)00072-7

Cited by 112 publications

(96 citation statements)

References 38 publications

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“…Two previous studies on the effects of medication on mean F0 have found no difference between ON and OFF medication (Jiang et al, 1999;Goberman et al, 2002). Sanabria et al (2001) found that F0 in sustained vowels was higher when patients were ON medication relative to OFF, an unanticipated finding given that speakers with PD have been shown to have significantly higher mean F0 relative to control speakers (Goberman et al, 2002). In addition, no significant effect of medication has yet been found for the variability (SD) of F0 (Goberman et al, 2005;Skodda et al, 2011).…”

Section: B Effects Of Medication In Speakers With Pdmentioning

confidence: 92%

“…Medication has been reported to improve subjective rating and intelligibility scores of PD speech (Nakano et al, 1973;Solomon and Hixon, 1993;De Letter et al, 2005) but there is not yet evidence that medication leads to consistent changes in F0. Two previous studies on the effects of medication on mean F0 have found no difference between ON and OFF medication (Jiang et al, 1999;Goberman et al, 2002). Sanabria et al (2001) found that F0 in sustained vowels was higher when patients were ON medication relative to OFF, an unanticipated finding given that speakers with PD have been shown to have significantly higher mean F0 relative to control speakers (Goberman et al, 2002).…”

Section: B Effects Of Medication In Speakers With Pdmentioning

confidence: 93%

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Relative fundamental frequency during vocal onset and offset in older speakers with and without Parkinson's disease

Stepp

2013

The Journal of the Acoustical Society of America

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The relative fundamental frequency (RFF) surrounding production of a voiceless consonant has previously been shown to be lower in speakers with hypokinetic dysarthria and Parkinson's disease (PD) relative to age/sex matched controls. Here RFF was calculated in 32 speakers with PD without overt hypokinetic dysarthria and 32 age and sex matched controls to better understand the relationships between RFF and PD progression, medication status, and sex. Results showed that RFF was statistically significantly lower in individuals with PD compared with healthy age-matched controls and was statistically significantly lower in individuals diagnosed at least 5 yrs prior to experimentation relative to individuals recorded less than 5 yrs past diagnosis. Contrary to previous trends, no effect of medication was found. However, a statistically significant effect of sex on offset RFF was shown, with lower values in males relative to females. Future work examining the physiological bases of RFF is warranted.

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Section: B Effects Of Medication In Speakers With Pdmentioning

confidence: 92%

Section: B Effects Of Medication In Speakers With Pdmentioning

confidence: 93%

Relative fundamental frequency during vocal onset and offset in older speakers with and without Parkinson's disease

Stepp

2013

The Journal of the Acoustical Society of America

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“…However, other studies have reported no differences in mean SPL for speakers with PD relative to healthy controls (Canter, 1963;Sadagopan & Huber, 2007;Tjaden & Wilding, 2004). Last, a variety of studies have reported rate abnormalities in PD (Canter, 1963(Canter, , 1965Flint et al, 1992;Hammen & Yorkston, 1996;Ludlow & Bassich, 1983;Metter & Hanson, 1986;Solomon & Hixon, 1993;Skodda & Schlegel, 2008), although other studies reported no differences in rate relative to healthy controls (Ackermann & Ziegler, 1991;Caligiuri, 1989;Goberman et al, 2002). It is interesting to note that speakers with PD can compensate for some of the diseaserelated changes in production using speech clarity techniques, resulting in a reduced articulation rate, increased F0 variability, increased VSA, and increased SPL (Dromey, 2000;Goberman & Elmer, 2005;Tjaden et al, 2013;Tjaden, Richards, Kuo, Wilding, & Sussman, 2014;.…”

Section: Acoustic Characteristics Of Pdmentioning

confidence: 98%

“…For example, relative to healthy controls, speakers with PD produce more centralized vowel space areas (VSAs; Liu, Tsao, & Kuhl, 2005;Tjaden, Lam, & Wilding, 2013;Turner, Tjaden, & Weismer, 1995;Weismer, Jeng, Laures, Kent, & Kent, 2001), less spectrally distinct consonants (Tjaden & Wilding, 2004), weakened or less precise stop closures (Ackermann & Ziegler, 1991), and shallower second formant (F2) slopes, indicating slowed changes in vocal tract adjustments (Kent & Adams, 1989;Kim, Kent, & Weismer, 2011;Walsh & Smith, 2011). At the suprasegmental level, speakers with PD tend to pause more often (Torp & Hammen, 2000; but see Goberman & Elmer, 2005), utilize an increased fundamental frequency (F0; Canter, 1963;Goberman, Coelho, & Robb, 2002), and exhibit decreased variability in F0 (Canter, 1963(Canter, , 1965Flint, Black, Campbell-Taylor, Gailey, & Levinton, 1992;Skodda, Visser, & Schlegel, 2011a). Some studies have also reported reduced sound pressure levels (SPLs; Fox & Ramig, 1997;Skodda, Visser, & Schlegel, 2011b;Tjaden et al, 2013;Walsh & Smith, 2011).…”

Section: Acoustic Characteristics Of Pdmentioning

confidence: 99%

Clear Speech Variants: An Acoustic Study in Parkinson's Disease

Lam

Tjaden

2016

J Speech Lang Hear Res

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Purpose The authors investigated how different variants of clear speech affect segmental and suprasegmental acoustic measures of speech in speakers with Parkinson's disease and a healthy control group. Method A total of 14 participants with Parkinson's disease and 14 control participants served as speakers. Each speaker produced 18 different sentences selected from the Sentence Intelligibility Test (Yorkston & Beukelman, 1996). All speakers produced stimuli in 4 speaking conditions (habitual, clear, overenunciate, and hearing impaired). Segmental acoustic measures included vowel space area and first moment (M1) coefficient difference measures for consonant pairs. Second formant slope of diphthongs and measures of vowel and fricative durations were also obtained. Suprasegmental measures included fundamental frequency, sound pressure level, and articulation rate. Results For the majority of adjustments, all variants of clear speech instruction differed from the habitual condition. The overenunciate condition elicited the greatest magnitude of change for segmental measures (vowel space area, vowel durations) and the slowest articulation rates. The hearing impaired condition elicited the greatest fricative durations and suprasegmental adjustments (fundamental frequency, sound pressure level). Conclusions Findings have implications for a model of speech production for healthy speakers as well as for speakers with dysarthria. Findings also suggest that particular clear speech instructions may target distinct speech subsystems.

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“…Dysprosody is a well-known and common speech deficit associated with PD (Caekebeke, Jennekens-Schinkel, Van der Linden, Buruma, & Roos, 1991). It can include disturbances in variation of fundamental frequency (f0; Gamboa et al, 1997;Goberman, Coelho, & Robb, 2002;Holmes, Oates, Phyland, & Hughes, 2000;Jiménez-Jiménez et al, 1997;Metter & Hanson, 1986;Skodda, Rinsche, & Schlegel, 2009) commonly perceived as monopitch, disturbances in variation of intensity (Metter & Hanson, 1986) commonly perceived as monoloudness, and disturbances in variation of stress (Cheang & Pell, 2007;Pell, Cheang, & Leonard, 2006). Previous research has demonstrated that monopitch is the most deviated perceptual dimension in PD speech (Darley, Aronson, & Brown, 1969;Holmes et al, 2000;Ludlow & Bassich, 1984;Plowman-Prine et al, 2009).…”

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confidence: 99%

Listener Perception of Monopitch, Naturalness, and Intelligibility for Speakers With Parkinson's Disease

Anand

Stepp

2015

J Speech Lang Hear Res

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Purpose: Given the potential significance of speech naturalness to functional and social rehabilitation outcomes, the objective of this study was to examine the effect of listener perceptions of monopitch on speech naturalness and intelligibility in individuals with Parkinson's disease (PD). Method: Two short utterances were extracted from monologue samples of 16 speakers with PD and 5 age-matched adults without PD. Sixteen listeners evaluated these stimuli for monopitch, speech naturalness and intelligibility using the visual sort and rate method.Results: Naïve listeners can reliably judge monopitch, speech naturalness, and intelligibility with minimal familiarization. While monopitch and speech intelligibility were only moderately correlated, monopitch and speech naturalness were highly correlated. Conclusions: A great deal of attention is currently being paid to improvement of vocal loudness and thus speech intelligibility in PD. Our findings suggest that prosodic characteristics such as monopitch should be explored as adjuncts to this treatment of dysarthria in PD. Development of such prosodic treatments may enhance speech naturalness and thus improve quality of life.

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Phonatory characteristics of Parkinsonian speech before and after morning medication: the ON and OFF states

Cited by 112 publications

References 38 publications

Relative fundamental frequency during vocal onset and offset in older speakers with and without Parkinson's disease

Relative fundamental frequency during vocal onset and offset in older speakers with and without Parkinson's disease

Clear Speech Variants: An Acoustic Study in Parkinson's Disease

Listener Perception of Monopitch, Naturalness, and Intelligibility for Speakers With Parkinson's Disease

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