Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
STABILITY AND PATTERNING OF SPEECH MOVEMENT SEQUENCES IN CHILDREN ANDADULTS
Autore:
SMITH A; GOFFMAN L;
Indirizzi:
PURDUE UNIV,DEPT AUDIOL & SPEECH SCI,HEAVILON HALL W LAFAYETTE IN 47907
Titolo Testata:
Journal of speech language and hearing research
fascicolo: 1, volume: 41, anno: 1998,
pagine: 18 - 30
Fonte:
ISI
Lingua:
ENG
Soggetto:
VELOCITY PROFILES; MOTOR CONTROL; DURATION; VARIABILITY; CONSONANTS; LIP; JAW;
Keywords:
SPEECH MOTOR CONTROL; DEVELOPMENT; KINEMATICS; ARTICULATION; PHYSIOLOGY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Physical, Chemical & Earth Sciences
Citazioni:
35
Recensione:
Indirizzi per estratti:
Citazione:
A. Smith e L. Goffman, "STABILITY AND PATTERNING OF SPEECH MOVEMENT SEQUENCES IN CHILDREN ANDADULTS", Journal of speech language and hearing research, 41(1), 1998, pp. 18-30

Abstract

Children (aged 4 and 7 years) and young adults produced a six-syllable utterance 15 times. The displacement of the lower lip was recorded with an Optotrak system and analyzed in a number of ways. First, using a procedure recently developed in our laboratory, displacement recordsfrom the 15 repetitions were amplitude-and time-normalized, and the spatiotemporal index (the Sn) was computed. The STI reflects the degreeto which repeated performance of a task produces movement trajectories that converge on a single pattern. Children produced less stable movement trajectories, as reflected in higher values on the STI. In a second analysis, standard measurements of amplitude and peak velocity were made for two opening and two closing tip movements. These measures suggested that, relative to the size of their oral structures, childrenhave large movement ranges in speech. Also, children tend to move with a lower peak velocity This large-amplitude, low-velocity movement style may reflect different underlying central processes. Finally, another analysis focused on open-close movement sequences associated with two words of the utterance. A pattern-recognition algorithm applied to the normalized waveforms from the open-close sequences revealed that children and adults produced equally distinctive movement trajectories for the two syllables. Taken together, these preliminary results suggest that nonlinear and nonuniform changes occur in components of the speech motor system during development.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 15/07/20 alle ore 21:33:35