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Gaze-triggered orienting is reduced in chronic schizophrenia
Tomoko Akiyama1, Motoichiro Kato, Taro Muramatsu
1Department of Psychiatry, Komagino Hospital, 273 Uratakao-cho, Hachioji City, Tokyo, 193-8505, Japan. tee-i@mxv.mesh.ne.jp <tee-i@mxv.mesh.ne.jp>
Psychiatry Research
|February 12, 2008
Summary
Patients with chronic schizophrenia exhibit gaze-specific hyposensitivity, benefiting less from gaze cues than controls. This suggests impaired gaze processing linked to potential superior temporal sulcus dysfunction.
Area of Science:
- Neuroscience
- Psychiatry
- Cognitive Psychology
Background:
- Schizophrenia patients show varied gaze processing abnormalities, including hypersensitivity or hyposensitivity.
- The superior temporal sulcus (STS), including the superior temporal gyrus (STG), is crucial for gaze processing and may be dysfunctional in schizophrenia.
- Chronic schizophrenia is associated with reduced STG volume.
Purpose of the Study:
- To investigate gaze behavior characteristics in patients with chronic schizophrenia.
- To determine if attentional orienting deficits in schizophrenia are specific to gaze cues.
Main Methods:
- A spatial cueing paradigm was used with 22 chronic schizophrenia patients and 22 age-matched controls.
- Pictorial gaze cues and arrow cues were employed to assess attentional orienting.
- The study examined benefits from congruent cues in schizophrenia patients versus controls.
Main Results:
- Schizophrenia patients showed significantly less benefit from congruent cues compared to normal subjects.
- This reduced benefit was observed specifically for gaze cues, not for arrow cues.
- Findings suggest a gaze-specific hyposensitivity in chronic schizophrenia.
Conclusions:
- Patients with chronic schizophrenia exhibit a gaze-specific hyposensitivity in attentional orienting.
- This deficit may be linked to impaired function in the superior temporal sulcus (STS).
- The findings align with schizophrenia's clinical symptoms and potential neural underpinnings.
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