Reduced prefrontal activation during tower of London (TOL) in first-episode schizophrenia: a multi-channel near-infrared spectroscopy study
10.3760/cma.j.issn.1674-6554.2010.11.008
- VernacularTitle:首发精神分裂症患者伦敦塔测试的近红外光谱成像研究
- Author:
Xuan LIU
;
Ye ZHU
;
Huiling WANG
;
Li DAI
;
Tianzi JIANG
;
Yue FANG
;
Hanbin HU
;
Gaohua WANG
;
Xiaoping WANG
- Publication Type:Journal Article
- Keywords:
Schizophrenia;
Near-infrared spectroscopy(NIRS);
Tower of London (TOL)
- From:
Chinese Journal of Behavioral Medicine and Brain Science
2010;19(11):980-982
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the executive function of the patients with first-episode schizophrenia,and their relationships with the positive and negative symptoms. And to evaluate the activation characteristics of prefrontal cortex(PFC) in the schizophrenia. Methods Near-infrared spectroscopy(NIRS) was used to assess the activation of the bilateral PFCs during the computerized version of Tower of London(TOL) tasks in schizophrenia and controls. The Positive and Negative Syndrome Scale(PANSS) was used to assess the psychiatric symptoms of the schizophrenia. 40 schizophrenic patients and 40 age- and gender-matched healthy subjects participated in this study. Results ( 1 ) The number of correct TOL responses in patients ( one-move ( 7.35 ± 1. 94 ), two-move ( 7.30 ± 2.53 ), three-move ( 6.58 ± 2.53 ), four-move ( 2.90 ± 1.89 ) ) was significantly less than the healthy controls( one-move (8.82 ± 1.48 ), two-move ( 8.38 ± 1.59 ), three-move ( 7.68 ± 1.47 ), four-move ( 3.73 ±1.71 ); P＜0. 05 ). ( 2 ) There was a significant negative correlation between the patients' task performance and the negative symptom scores(P ＜ 0.05 ). (3) The majority of the prefrontal area was activated in health subjects.Patients were characterized by significant decreased activation in the left PFC during the TOL task compared to healthy subjects. Conclusion Schizophrenic patients have executive function disorder at the initial stage of the disease.The results support that schizophrenia patients have hypofrontality ,and executive function is significantly negatively correlated with negative symptoms. NIRS my be a useful tool for research and clinical assessment for major psychoses.
