Some Effects of Congenital Spasticity on Fundamental Frequency

Jacques, Richard; Rastatter, Michael P.; Sullivan, James A.

doi:10.2466/pms.1985.61.1.75

Cited by 8 publications

(3 citation statements)

References 3 publications

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“…The production data support this claim. Similarly, given that narrowed fundamental frequency range has often been noted as a hallmark of dysarthria (Hardy, 1983;Jacques, Rastatter, & Sullivan, 1985;Schlenck, Bettrich, & Willmes, 1993;Wit, Maassen, Gabreels, & Thoonen, 1993), children may have had difficulty producing 3 distinct pitch categories. The results indicated that listeners often confused medium-pitch vocalizations for high-and low-pitch sounds.…”

Section: Discussionmentioning

confidence: 99%

Influence of familiarity on identifying prosodic vocalizations produced by children with severe dysarthria

Patel

Schroeder

2007

Clinical Linguistics & Phonetics

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Familiarity is thought to aid listeners in decoding disordered speech; however, as the speech signal degrades, the "familiarity advantage" becomes less beneficial. Despite highly unintelligible speech sound production, many children with dysarthria vocalize when interacting with familiar caregivers. Perhaps listeners can understand these vocalizations by cuing into prosodic consistencies in their child's productions. This paper examined whether familiarity influenced the identification of sustained vowels that varied in pitch, duration, and pitch-duration combinations, produced by 3 children with severe dysarthria due to cerebral palsy. Thirty-six listeners participated in the study. For each speaker, there were 2 familiar listeners (FAM), 5 experienced listeners (EXP), and 5 unfamiliar/inexperienced listeners (INX). Results indicated that familiarity did not impact identification of prosodic contrasts. In fact, all 3 listener groups were highly accurate in identifying duration, somewhat less successful at identifying pitch, and least accurate in identifying combinations of pitch and duration. Influences of speaker-listener variables on familiarity are discussed.

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Section: Discussionmentioning

confidence: 99%

Influence of familiarity on identifying prosodic vocalizations produced by children with severe dysarthria

Patel

Schroeder

2007

Clinical Linguistics & Phonetics

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“…The reduced pitch variation within sentences due to rigidity, while speakers with cerebral palsy tend to display extreme variability related to reduced control of the laryngeal mechanism (Darley, Aronson & Brown, 1969b;Jacques, Rastatter & Sullivan, 1985). As a result of these different characteristics, both groups are susceptible to errors in tone production.…”

Section: Phonology Mandarin Has 22 Initial Consonantsmentioning

confidence: 99%

10. Motor Speech Disorders in Chinese

Whitehill¹,

K-Y²

2014

Motor Speech Disorders

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MOTOR SPEECH DISORDERS IN CHINESE Chinese, spoken by approximately 20% of the world's population, is the most commonly spoken language in the world (Fung, 1990). There is some debate regarding whether varieties of spoken Chinese should be considered dialects or separate language. Here, we regard them as separate languages. The various languages of Chinese are considered united by a common written system, although this characterization is problematic for Cantonese, which has many colloquial expressions with no written form (Bauer & Benedict, 1997). In this chapter, we focus on two of the most common Chinese languages, Cantonese and Mandarin (Putonghua). Cantonese is spoken in Hong Kong, Southern China and many overseas Chinese communities. Mandarin, also known as Standard Chinese, is the official national language of China and Taiwan, and is one of the four official languages of Singapore. Cantonese Detailed descriptions of Cantonese phonology can be found in Bauer and Benedict (1997), Cheung (1986) and Zee (1991). There have been active debates about several aspects of Cantonese phonology, including (a) the treatment of final glides/diphthongs, (b) the nature of the consonants /kw/ and /kw h /, and (c) the number of lexical tones. In this chapter, we have generally adopted the positions of Bauer and Benedict (1997). Syllable structure. Traditionally, Chinese syllables have been described using an onset, a rime (comprising an obligatory vowel and an optional coda) and a tone. We adopt here an alternate model of the syllable structure (Bauer & Benedict, 1997), which takes account of the two permissible syllabic nasals, /m/ and /ŋ/. The structure is: (C1) V1 or Cn (C2 or V2), where C1 = initial consonant, V1 = vowel, Cn = syllabic nasal consonant, C2 = final consonant, and V2 = ending vowel (second portion of diphthong); portions in parentheses are optional. Over 98% of Cantonese syllables are CV or CVC in structure (Wang, 1941, cited in Lau & So, 1988). Tone, which is carried on the vowel portion of the syllable, is obligatory.

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“…Darley et al (1969b) reported that phonatory stenosis and incompetence, which were due to abnormalities in the laryngeal mechanism, affected different types of dysarthria. Jacques et al (1985) observed a reduction in laryngeal control in cerebral palsy patients with congenital spasticity. Theodoros and Murdoch (1994) reported a high incidence, and a wide range, of laryngeal dysfunction in dysarthria associated with closed-head injury.…”

Section: Introductionmentioning

confidence: 95%

The Impact of Cerebral Palsy on the Intelligibility of Pitch-based Linguistic Contrasts

Ciocca

Whitehill

Yin

2004

J. Physiol. Anthropol.

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This study investigated the perception of three Cantonese level tones produced by speakers with dysarthria associated with cerebral palsy. Four speakers with dysarthria were selected on the basis of their distinctive patterns of fundamental frequency (F0) values observed in the level tones they produced, which showed errors in either F0 level or, F0 contour, or both. Monosyllabic words which contrasted in tone level were used as stimuli in an identification task. Five expert listeners identified the tones among the six Cantonese contrastive tones. Results showed that the tones produced by the dysarthric speakers were predominantly perceived as level tones; although a majority was perceived as the wrong level tone. The most important finding is that only the level tones produced by dysarthric speakers could be identified as rising or falling contour tones. The frequent perceptual confusion among the level tones, and the perception of contour tones, shows that a disorder in the production of pitch-based linguistic contrasts can have a substantial impact on the communication abilities of individuals with cerebral palsy.

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Some Effects of Congenital Spasticity on Fundamental Frequency

Cited by 8 publications

References 3 publications

Influence of familiarity on identifying prosodic vocalizations produced by children with severe dysarthria

Influence of familiarity on identifying prosodic vocalizations produced by children with severe dysarthria

10. Motor Speech Disorders in Chinese

The Impact of Cerebral Palsy on the Intelligibility of Pitch-based Linguistic Contrasts

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