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ObjectiveTo explore the change of the event related potential brain topographic map on depression' mental rotation,and to perfect the brain function relation map for depression in space ability.Methods 32 depression and 29 normal healthy people were tested to make mental rotation tasks in the brain ERP system.The distribution of the changing brain topographic map were observed.Results ( 1 ) Compared with the control group ( error rate ( 29±9 ) ％,response time ( 604.74 ± 54.39 ) ms,the error rate was significantly higher and response time was significantly longer in depression (error rate( 33 ± 15 )％,response time(755.22 ± 70.18 )ms,P＜0.05).(2) Compared with the control group (N100:PZ( -3.78 ± 1.05)μV,CZ( -5.67 ±2.21)μV,P3( -2.34 ±0.59) μV,P4( -2.92 ±0.80) μV ;P500:PZ(7.35 ±2.61 ) μV,CZ(7.65 ± 2.42) μV,P3 (6.53 ±2.11 ) μV,P4 ( 7.29 ± 2.57 ) μV ),the total volatility was significantly lower in depression ( N 100:PZ ( - 0.31 ±0.09)μV,CZ( -2.27 ±0.57)μV,P3( -0.30 ±0.07) μV,P4( -0.33 ±0.08) μV;P500:PZ(6.04 ±2.16)μV,CZ ( 5.92 ± 2.01 ) μV,P3 ( 6.02 ± 2.11 ) μV,P4 (6.01 ± 2.34 ) μV,P ＜ 0.05 ) and the excitability difference of the left and right parietal-occipital lobe was disappeared (P＞0.05) ; Compared with the control group,in N100 the normal and mirror excitability was significantly lower,and in P500 the normal excitability was significantly lower,but mirror was significantly higher in depression (P ＜ 0.05 ).Compared with the left and right brain,the normal excitability in the right parietal-occipital lobe was significant higher (P ＜ 0.05 ),but the mirror excitement difference was disappeared in depression (P＞ 0.05 ),and the normal and mirror excitement in the right parietal-occipital lobe was both significantly higher in normal healthy people (P ＜ 0.05 ).ConclusionDepressed patients; mental rotation ability is impaired.And the negative potential for looking forward to reaction is lower and exist the right advantage hemisphere brain in normal,but mirror advantage hemisphere disappears in depressed patients.This study suggests the brain topographic map of mental rotation ability damaged can be used as the clinical auxiliary diagnosis index.
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Objective To explore the brain electrophysiological mechanism of object rotation in first-episode schizophrenia.Methods 30 patients with schizophrenia and 28 normal healthy people,who were from the Center for Mental Disease Control and Prevention,Third Hospital of PLA,took part in the mental rotation tasks,then the incubation period and amplitude of P500,and the wrong number and reaction time were measured.Results Compared with control group ( normal:(494.16 ± 34.68 ) ms,( 9.56 ± 2.54) μV; mirror:(496.51 ± 33.10 ) ms,(6.38 ± 2.41 ) μV),schizophrenia' incubation periods were significantly delayed ( normal:( 571.30 ± 51.21 ) ms;mirror:(573.41 ±39.27) ms) and volatility were significantly lower ( normal:(4.26 ± 1.01 ) μV; mirror:(3.61± 1.21 )μV) in normal and mirror rotation (P＜0.05 ).The mirror-normal differences were not significant on the incubation periods of two groups (P ＞ 0.05 ) ; the mirror-normal image differences were not significant on the patient group' volatility (P ＞ 0.05 ) ; the normal volatility was significantly higher than mirror in the control group (P ＜ 0.05).Conclusion Schizophrenia'mental rotation ability is impaired,and mirror-normal differences on mental rotation are disappeared.It can be used as an early-stage clinical auxiliary diagnosis index.
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The real-time and wireless mobile has become the trend of electrocardiogram (ECG) monitoring system for atrial fibrillation (AF). At present, the ECG with multi-leads (12 leads) is needed by most of AF signal extraction algorithms in order to extract effective AF waves. However, it is not very convenient for patients' movements in a multi-lead ECG monitoring system. Although the traditional template matching method is for single-lead ECG extraction, it is less robust than blind source extraction algorithm, and is affected severely by noise. In view of this,we put forth a new real-time algorithm for extracting AF from the singlelead ECG, using non-stationary heartbeat series during AF to extend dimension (segmentation), and then applying a blind source extraction algorithm to extract the effective AF signal. Experiment results showed that this method could be used to extract AF signal effectively from a single-lead ECG data. Therefore, it is suitable to apply this method to Wireless Monitoring System using single-lead ECG.
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Humanos , Algoritmos , Fibrilación Atrial , Electrocardiografía , Métodos , Procesamiento de Señales Asistido por ComputadorRESUMEN
Objective: To explore the stress effects of traffic accident on changing the NO level and SOD activity, as well as the relationship between personality and prognostic change. Methods: Serum level of NO and activity of SOD were measured in 152 patients with traffic accidents and in 60 control subjects. All subjects were assessed with the Eysenck Personality Questionnaire (EPQ). Results: NO and SOD were significantly higher in patients as compared to controls ( P
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Objective:To investigate the effect of cold stress (-10℃?10h) on NO and NOS in brain of mice. Methods: Forty mice were assigned into two groups randomly: The experimental group was the stress group and the other was the control group. The levels of NO and NOS activity were determined after cold stress. Results:The level of NO in stress group was significant lower than that in control group ( t =2.67,P
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Objective: To investigate the effects of forced swimming on NO and NOS in brain of mice. Method: Sixty mice were assigned into three groups randomly: two stress groups, the content of NO and NOS were determined at 1hour and 2 hours after forced swimming respectively, and one control group. NO was tested by chromatic comparison. NOS was tested by enzyme assay. Results: The level of NO in stress group tested at 1 hour was significantly lower than that in control group (17.38 ?5.63/27.47?15.16 (mol/gprot, t=2.67, p
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Objective: To study the rate of PTSD after traffic accident in orthopedics and do retrospective analysis. Method: Eighty one patients wounded by traffic accident in orthopedic ward were surveyed. Acute stress reaction (ASR) and posttraumatic stress disorder (PTSD) were diagnosed according to CCMD-2-R criteria. SCL-90 and EPQ were also applied. Results: 33 cases (40.7%) were diagnosed as ASR and 31 (38.3%) as PTSD among all subjects. SCL-90 score and nearly all subscores were higher in patients with PTSD than patients without (P
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Objective: to explore the influence of traffic accident psychologically and physiologically Method:120 inpatients fractured in traffic accident (study group) and 67 fractured inpatients (control group) from other reasons were collected The study group was divided into those with stable character (with N score of EPQ56) All subjects completed SCL-90 Their IL-1?, IL-2, IL-8 and cortisol level were measured Result: The total score and subscores of SCL-90 of study group were significantly higher than that of control The serum levels of IL-1?, IL-2, IL-8 were lower than that of control, while cortisol level was higher than control The interleukin levels of stable group were higher than that of unstable group Conclusion:Patients injured by traffic accident have poor health both mentally and physically, especially for those with unstable character