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Related Experiment Videos

Response programming in patients with schizophrenia: a kinematic analysis

M E Downing1, J G Phillips, J L Bradshaw

  • 1Department of Psychology, Monash University, Clayton, Vic, Australia.

Neuropsychologia
|September 2, 1998
PubMed
Summary

Schizophrenia patients show normal functional asymmetry but struggle with movement initiation and efficiency, indicating fronto-subcortical circuitry disturbances. This impacts motor programming in schizophrenia.

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Psychiatry

Background:

  • Schizophrenia may involve subcortical pathway dysfunction or abnormal brain asymmetries.
  • Kinematic analysis of movement tasks can reveal basal ganglia dysfunction.

Purpose of the Study:

  • To investigate functional asymmetry anomalies in schizophrenia using a cued sequential movement task.
  • To explore kinematic differences in movement initiation and execution between patients and controls.

Main Methods:

  • A cued sequential movement task was performed by 20 schizophrenia patients and 20 controls using a graphics tablet.
  • Movements were initiated with or without external cues, utilizing preferred or non-preferred hands.
  • Kinematic analysis assessed movement initiation time, variability, and efficiency.

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Main Results:

  • Schizophrenia patients displayed largely normal functional asymmetries.
  • Patients exhibited programming deficits, with delayed movement initiation without external cues.
  • Schizophrenia movements were more variable and less efficient, similar to Huntington's disease.

Conclusions:

  • Findings support fronto-subcortical circuitry disturbance in schizophrenia.
  • Motor programming deficits, not functional asymmetry, appear prominent.
  • Movement kinematic analysis offers insights into schizophrenia's neurobiological underpinnings.