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Differences in bimanual coordination associated with stuttering

H N Zelaznik1, A Smith, E A Franz

  • 1Department of Health, Kinesiology and Leisure Studies, Purdue University, IN 47907, USA. hnzelaz@purdue.edu

Acta Psychologica
|January 22, 1998
PubMed
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Adults who stutter show differences in motor coordination during bimanual tasks. While they can match movement rates, individuals who stutter exhibit reduced movement amplitude and increased variability in coordination.

Area of Science:

  • Neuroscience
  • Motor Control
  • Speech-Language Pathology

Background:

  • Previous research on non-speech motor skills in individuals who stutter has yielded mixed results.
  • Understanding motor coordination in stuttering is crucial for a comprehensive view of the disorder.

Purpose of the Study:

  • To investigate the motor coordination of adults who stutter during a bimanual finger movement task.
  • To compare the movement kinematics and dynamics between individuals who stutter and those who do not.

Main Methods:

  • Fifteen adults who stutter and 15 matched controls performed rhythmic bimanual finger movements.
  • Movement amplitude, peak velocity, and relative phase variability were analyzed during a 70-second trial.

Main Results:

Related Experiment Videos

  • Individuals who stutter maintained the prescribed movement rate but demonstrated reduced amplitude and peak velocity.
  • Dynamical analysis revealed greater relative phase variability in the stuttering group compared to controls.

Conclusions:

  • Adults who stutter exhibit distinct motor coordination patterns in bimanual tasks, characterized by reduced amplitude and increased variability.
  • These findings suggest underlying differences in motor strategies and coordination that may extend to various motor tasks requiring multi-effector control.