The correlation of cerebral perfusion characteristics and cognitive function on patients with unipolar and bipolar depression

Abstract

Objective To analyze the correlation of cerebral perfusion characteristics and cognitive function on patients with unipolar and bipolar depression. Methods The r-CBF imaging was detected by SPECT forall subjects. Evaluated cognitive function of subjects using WAIS-CR and WMA, and analysed data using SPSS.Results Data showed that some regions in the brain, e.g. temporal lobe, frontal lobe, hippocampus, and basal ganglia, had significant alterations of r-CBF in depressed patients as compared with healthy controls (P ＜ 0. 05 ).Compared with UPD, BPD showed increased perfusion in basal ganglia ( 0,22.73%; 4.54%, 36. 36% ) (P ＜0.05 ). Furthermore there was no significant different incognitive deficits between UPD and BPD(P ＞ 0. 05 ) , and correlations between cognitive impairment and hypoperfusion of rCBF (P ＜ 0. 05 ). Conclusion There be exist difference in r-CBF between UPD and BPD. The perfusion of r-CBF in BPD is significantly increased than that in UPD,and it suggest that hyperperfusion in basal ganglia may be the biological basis when bipolar depression turning to manic. Key words: Depression; Single photon emission computerized tomography; Cognitive function