The relationship between cerebral blood flow velocity and attention and execution function in patients with major depressive episode / 中国神经精神疾病杂志

Objective To find out the cerebral blood flow velocity and its relationship with attention and execu?tion function in patients with major depressive episode. Methods A total of 70 patients with major depressive episode and 65 healthy controls were included. The 24 items Hamilton depression scale (HAMD-24) was adopted for patients' depressive symptoms assessment. The Cancellation Test (CT) and Wisconsin Card Sorting Test (WCST) were adopted for cognitive function assessment. And the blood flow velocity of cerebral arteries were detected by transcranial Doppler ul?trasonography (TCD). Results Compared with the controls, the patients showed significantly slower average blood flow ve?locity in basilar artery, left middle cerebral artery, right middle cerebral artery, left anterior cerebral artery and right ante?rior cerebral artery (P<0.05). Compared with those in the controls, the net score of each stage and the total net score of CT were significantly lower in the patients, while the total number of responses, response errors, perseverative errors and the necessary response number to complete the first category of WCST were significantly higher (P<0.01). The blood flow velocity in the cerebral basilar artery (r=0.25), left middle cerebral artery (r=0.46), right middle cerebral artery (r=0.25) and right posterior cerebral artery (r=0.26) showed positive correlations with total net score of CT (P<0.05), and the cere?bral artery average blood flow velocity showed negative correlations with the total number of responses, response errors and perseverative errors of WCST in the patients (P<0.05). Conclusions Compared with healthy controls, patients with major depressive episode suffer from lower average cerebral artery blood flow velocity, bad attention and executive func?tion. The change of average cerebral artery blood flow velocity may be responsible for impaired cognitive function in epi?sode major depression patients.

~1H-MRS in bilaterlis frontal lobe and hippocampus of patients with first episode major depression after SSRIs antidepressant treatment / 西安交通大学学报(医学版)

Objective To measure neuro-biochemical changes in brain of first episode major depression (MD) patients. Methods Single-voxel proton magnetic resonance spectroscopic (1H-MRS) examination of bilateralis frontal lobe and hippocampus was conducted in 21 first episode major depression patients and 21 age-, sex-and education-matched healthy controls. After this, major depression patients took selectivity serotonin reuptake inhibitors (SSRIs) for three months. Then, we examined the changes in NAA, Cho, Cr, Glx and mI in bilaterlis frontal lobe and hippocampus of patients. Finally, we compared the metabolism of the subjects with that of the controls. Results ① Bilateralis frontal lobe NAA/Cr, right frontal lobe Glx/Cr and left hippocampus NAA/Cr and Glx/Cr were significantly lower in MD patients than in the controls, but right frontal lobe and right hippocampus mI/Cr significantly were higher than those in controls. ② After treatment left frontal lobe and left hippocampus NAA/Cr significantly increased compared with pretherapy. Right frontal lobe mI/Cr significantly decreased. Conclusion Nerve cell activity disorder, abnormal second messenger and glutamicacid and glutamine may be involved in the pathogenesis of MD. Antidepressant can regulate abnormal metabolism and improve nerve cell activity.

1H-MRS in frontal lobe and hippocampus of patients with first episode major depression / 西安交通大学学报(医学版)

Objective To measure metabolism in brain of first episode major depression patients with 1H-MRS.Methods Single-voxel proton magnetic resonance spectroscopic(1H-MRS) examination of bilateralis frontal lobe and hippocampus was conducted in 23 patients with first episode major depression and 23 age-,sex-and education-matched healthy controls.We examined the metabolism such as NAA,Cho,Cr,Glx and mI in bilaterlis frontal lobe and hippocampus of patients.Results Bilateralis frontal lobe NAA/Cr,right frontal lobe Glx/Cr and left hippocampus NAA/Cr and Glx/Cr were significantly lower in MD patients versus controls,but right frontal lobe and right hippocampus mI/Cr significantly higher than in controls.Conclusion Nerve cell activity disorder,abnormal second messenger and glutamicacid and glutamine may be involved in the pathogenesis of major depression.