The effect of intrathecal injection of dynorphin A (1-17) on second messenger systems of spinal cord relative to behavioral change in rats was studied. Dynorphin A (1-17) 5 ,10 (20nmol) caused dose-dependent flaccid p...The effect of intrathecal injection of dynorphin A (1-17) on second messenger systems of spinal cord relative to behavioral change in rats was studied. Dynorphin A (1-17) 5 ,10 (20nmol) caused dose-dependent flaccid paralysis of hindlimbs. Dynorphin A (1-17) 10, 20 nmol dose-dependently decreased spinal adenylate cyclase (AC) activity, cyclic AMP production, calmodulin (CaM) level and cyclic-nucleotide phosphodiesterase(PDE)activity 10 min after intrathecal injection. They recovered to a varying extent two hours later. Pretreatment with selective κ-opioid receptor antagonist nor-BNI 30 nmol 10 min before dynorphin A (1-17) markedly antagonized the effects of dynorphin A (1-17 ) at 20 nmol on hindlimb paralysis and inhibition of intracellular second messengers. The L-type calcium channel blocker verapamil (100nmol) also played a role in blocking dynorphin neurotoxicity. The NMDA receptor antagonist APV could partially or completely block dynorphin inhibition of CaM level and PDE activity without affecting paralysis and decrease of AC-cAMP level induced by dynorphin A(1-17) 10 min after intrathecal injection.展开更多
To investigate changes of functional activation areas of the cerebral cortex and the connectivity of motor cortex networks （MCNs） in stroke patients during the recovery, five patients with the infarct in their left ...To investigate changes of functional activation areas of the cerebral cortex and the connectivity of motor cortex networks （MCNs） in stroke patients during the recovery, five patients with the infarct in their left hemispheres are recruited. Functional magnetic resonance imaging （fMRI） is performed in the second, fourth, eighth, and sixteenth weeks after the stroke. Images are analyzed using the professional software SPM5 to obtain the bilateral activation of the motor cortex in left and right handgrip tests. MCN data are extracted from the active areas, and the structural and functional characteristic parameters are computed to indicate the connectivity of the network. Results show that the ipsilesional hemisphere recruits more areas with less active extent during the handgrip test, compared with the contralesional hemisphere. MCN shows a higher overall degree of statistical independence and more statistical dependence among motor areas with the gradual recovery. It can help physicians understand the recovery mechanism.展开更多
BACKGROUND: This systematic review aims to investigate the prediction value of diffusion tensor imaging for motor function recovery of ischemic stroke patients.METHODS: Cochrane Central Register of Controlled Trials(C...BACKGROUND: This systematic review aims to investigate the prediction value of diffusion tensor imaging for motor function recovery of ischemic stroke patients.METHODS: Cochrane Central Register of Controlled Trials(CENTRAL)(the Cochrane Library 2016, Issue 9), Pub Med, Embase, Clarivate Analytics, Scopus, CINAHL, Chinese Biomedical Literature Database, China National Knowledge Infrastructure and Google Scholar were searched for either motor recovery or corticospinal tract integrity by diffusion tensor imaging in different stroke phase from January 1, 1970, to October 31, 2016. The study design and participants were subjected to metrological analysis. Correlation coeffi cient(r) was used for evaluating the relationship between fractional anisotropy(FA) and motor function outcome. Correlation coeffi cient values were extracted from each study, and 95% confidence intervals(CIs) were calculated by Fisher's z transformation. Meta-analysis was conducted by STATA software.RESULTS: Fifteen studies with a total of 414 patients were included. Meta-analysis showed that FA in the subacute phase had the signifi cant correlation with motor function outcome(ES=0.75, 95%CI 0.62–0.87), which showed moderate quality based on GRADE system. The weight correlation coeffi cient revealed that an effect size(ES) of FA in acute phase and chronic phase was 0.51(95%CI 0.33–0.68) and 0.62(95%CI 0.47–0.77) respectively.CONCLUSION: This meta-analysis reveals that FA in the subacute phase after ischemic stroke is a good predictor for functional motor recovery, which shows moderate quality based on the GRADE system.展开更多
目的观察针刺联合镜像疗法治疗脑卒中患者上肢运动功能障碍的临床疗效。方法将90例脑卒中上肢运动功能障碍患者按随机数字表法分为对照1组(30例,给予针刺治疗)、对照2组(30例,给予镜像疗法治疗)和观察组(30例,给予针刺联合镜像疗法治疗)...目的观察针刺联合镜像疗法治疗脑卒中患者上肢运动功能障碍的临床疗效。方法将90例脑卒中上肢运动功能障碍患者按随机数字表法分为对照1组(30例,给予针刺治疗)、对照2组(30例,给予镜像疗法治疗)和观察组(30例,给予针刺联合镜像疗法治疗),疗程均为2周。比较3组患者治疗前后Fugl-Meyer评估量表上肢板块(Fugl-Meyer assessment upper extremity,FMA-UE)评分,Wolf运动功能测试(Wolf motor function test,WMFT)量表评分,改良Barthel指数(modified Barthel index,MBI),国际功能、残疾和健康分类(international classification of functioning,disability and health,ICF)评分及伸腕主动运动范围(active range of motion,AROM)和基于FMA-UE评分判定临床疗效。结果观察组临床疗效优于对照1组和对照2组(P<0.05);治疗后3组患者FMA-UE评分、WMFT评分、MBI均较治疗前显著增加(P<0.05),ICF评分显著减少(P<0.05),且观察组FMA-UE评分、WMFT评分、MBI增加程度,ICF评分减少程度显著大于对照1组和对照2组(P<0.05);治疗后观察组患者伸腕AROM显著大于对照1组和对照2组(P<0.05)。结论针刺联合镜像疗法能有效改善脑卒中患者上肢运动功能障碍。展开更多
Hemodynamic response during motor imagery （MI） is studied extensively by functional magnetic resonance imaging （fMRI） technologies. To further understand the human brain functions under MI, a more precise classifi...Hemodynamic response during motor imagery （MI） is studied extensively by functional magnetic resonance imaging （fMRI） technologies. To further understand the human brain functions under MI, a more precise classification of the brain regions corresponding to each brain function is desired. In this study, a Bayesian trained radial basis function （RBF） neural network, which determines the weights and regularization parameters automatically by Bayesian learning, is applied to make a precise classification of the hemodynamic response to the tasks during the MI experiment. To illustrate the proposed method, data with MI task performance from 1 subject was used. The results demonstrate that this approach splits the hemodynamic response to different tasks successfully.展开更多
文摘The effect of intrathecal injection of dynorphin A (1-17) on second messenger systems of spinal cord relative to behavioral change in rats was studied. Dynorphin A (1-17) 5 ,10 (20nmol) caused dose-dependent flaccid paralysis of hindlimbs. Dynorphin A (1-17) 10, 20 nmol dose-dependently decreased spinal adenylate cyclase (AC) activity, cyclic AMP production, calmodulin (CaM) level and cyclic-nucleotide phosphodiesterase(PDE)activity 10 min after intrathecal injection. They recovered to a varying extent two hours later. Pretreatment with selective κ-opioid receptor antagonist nor-BNI 30 nmol 10 min before dynorphin A (1-17) markedly antagonized the effects of dynorphin A (1-17 ) at 20 nmol on hindlimb paralysis and inhibition of intracellular second messengers. The L-type calcium channel blocker verapamil (100nmol) also played a role in blocking dynorphin neurotoxicity. The NMDA receptor antagonist APV could partially or completely block dynorphin inhibition of CaM level and PDE activity without affecting paralysis and decrease of AC-cAMP level induced by dynorphin A(1-17) 10 min after intrathecal injection.
基金Supported by the National Natural Science Foundation of China (30670543)~~
文摘To investigate changes of functional activation areas of the cerebral cortex and the connectivity of motor cortex networks （MCNs） in stroke patients during the recovery, five patients with the infarct in their left hemispheres are recruited. Functional magnetic resonance imaging （fMRI） is performed in the second, fourth, eighth, and sixteenth weeks after the stroke. Images are analyzed using the professional software SPM5 to obtain the bilateral activation of the motor cortex in left and right handgrip tests. MCN data are extracted from the active areas, and the structural and functional characteristic parameters are computed to indicate the connectivity of the network. Results show that the ipsilesional hemisphere recruits more areas with less active extent during the handgrip test, compared with the contralesional hemisphere. MCN shows a higher overall degree of statistical independence and more statistical dependence among motor areas with the gradual recovery. It can help physicians understand the recovery mechanism.
文摘BACKGROUND: This systematic review aims to investigate the prediction value of diffusion tensor imaging for motor function recovery of ischemic stroke patients.METHODS: Cochrane Central Register of Controlled Trials(CENTRAL)(the Cochrane Library 2016, Issue 9), Pub Med, Embase, Clarivate Analytics, Scopus, CINAHL, Chinese Biomedical Literature Database, China National Knowledge Infrastructure and Google Scholar were searched for either motor recovery or corticospinal tract integrity by diffusion tensor imaging in different stroke phase from January 1, 1970, to October 31, 2016. The study design and participants were subjected to metrological analysis. Correlation coeffi cient(r) was used for evaluating the relationship between fractional anisotropy(FA) and motor function outcome. Correlation coeffi cient values were extracted from each study, and 95% confidence intervals(CIs) were calculated by Fisher's z transformation. Meta-analysis was conducted by STATA software.RESULTS: Fifteen studies with a total of 414 patients were included. Meta-analysis showed that FA in the subacute phase had the signifi cant correlation with motor function outcome(ES=0.75, 95%CI 0.62–0.87), which showed moderate quality based on GRADE system. The weight correlation coeffi cient revealed that an effect size(ES) of FA in acute phase and chronic phase was 0.51(95%CI 0.33–0.68) and 0.62(95%CI 0.47–0.77) respectively.CONCLUSION: This meta-analysis reveals that FA in the subacute phase after ischemic stroke is a good predictor for functional motor recovery, which shows moderate quality based on the GRADE system.
文摘目的观察针刺联合镜像疗法治疗脑卒中患者上肢运动功能障碍的临床疗效。方法将90例脑卒中上肢运动功能障碍患者按随机数字表法分为对照1组(30例,给予针刺治疗)、对照2组(30例,给予镜像疗法治疗)和观察组(30例,给予针刺联合镜像疗法治疗),疗程均为2周。比较3组患者治疗前后Fugl-Meyer评估量表上肢板块(Fugl-Meyer assessment upper extremity,FMA-UE)评分,Wolf运动功能测试(Wolf motor function test,WMFT)量表评分,改良Barthel指数(modified Barthel index,MBI),国际功能、残疾和健康分类(international classification of functioning,disability and health,ICF)评分及伸腕主动运动范围(active range of motion,AROM)和基于FMA-UE评分判定临床疗效。结果观察组临床疗效优于对照1组和对照2组(P<0.05);治疗后3组患者FMA-UE评分、WMFT评分、MBI均较治疗前显著增加(P<0.05),ICF评分显著减少(P<0.05),且观察组FMA-UE评分、WMFT评分、MBI增加程度,ICF评分减少程度显著大于对照1组和对照2组(P<0.05);治疗后观察组患者伸腕AROM显著大于对照1组和对照2组(P<0.05)。结论针刺联合镜像疗法能有效改善脑卒中患者上肢运动功能障碍。
基金supported by the National Natural Science Foundation of China under Grant No. 9082006 and 30770590Key Research Project of Science and Technology of MOE under Grant No. 107097863 Program under Grant No. 2008AA02Z4080
文摘Hemodynamic response during motor imagery （MI） is studied extensively by functional magnetic resonance imaging （fMRI） technologies. To further understand the human brain functions under MI, a more precise classification of the brain regions corresponding to each brain function is desired. In this study, a Bayesian trained radial basis function （RBF） neural network, which determines the weights and regularization parameters automatically by Bayesian learning, is applied to make a precise classification of the hemodynamic response to the tasks during the MI experiment. To illustrate the proposed method, data with MI task performance from 1 subject was used. The results demonstrate that this approach splits the hemodynamic response to different tasks successfully.
