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Cue dependent right hemineglect in schizophrenia: a kinematic analysis
M E Downing1, J G Phillips, J L Bradshaw
1Department of Psychology, Monash University, Clayton VIC, Australia.
Journal of Neurology, Neurosurgery, and Psychiatry
|October 15, 1998
Summary
Patients with schizophrenia exhibit slower movement initiation and altered movement trajectories, suggesting cue-dependent right hemineglect. This highlights potential attentional and communication deficits in schizophrenia.
Area of Science:
- Neuroscience
- Cognitive Psychology
- Psychiatry
Background:
- Schizophrenia is potentially linked to attentional deficits and impaired internal cueing.
- Understanding these processes is crucial for explaining cognitive dysfunction in schizophrenia.
Purpose of the Study:
- To investigate attention for action in a cued movement task in schizophrenia.
- To test hypotheses regarding hemispheric dysfunction and interhemispheric communication deficits.
Main Methods:
- 15 patients with schizophrenia and 15 controls performed cued and uncued movements with either hand.
- Kinematic analysis of pen tip trajectories was performed using a graphics tablet.
Main Results:
- Schizophrenia patients showed delayed initiation of rightward movements when uncued.
- Patients displayed reduced differences in movement trajectory shapes between abduction and adduction, indicating altered interhemispheric communication.
Conclusions:
- Schizophrenia may manifest as a form of cue-dependent right hemineglect.
- Findings suggest specific attentional and interhemispheric communication impairments in schizophrenia.
