Résumé
Emotional task is one of the main methods to study the attention bias and emotional function of affective disorder.Functional near-infrared spectroscopy(fNIRS)studies based on emotional tasks in patients with affective disorders have shown that facial emotion recognition task,the emotional stroop effect,and the emotion induction task combined with fNIRS technology have clinical value in the diagnosis and treatment of affective disorders.The defects of attention function and emotional processing in patients with affective disorders are related to abnormal activation of the left prefrontal cortex,especially the differences in brain activation patterns are related to depressive symptoms in patients with depressive disorders.The future direction of using fNIRS to study emotional tasks is to combine a variety of neuroimaging methods to conduct large-sample longitudinal cohort studies to obtain more objective bases for diagnosis and treatment,and to compare the differences in activation areas of different emotional stimulation materials.
Résumé
Objective@#Functional near infrared spectroscopy (fNIRS) was used to assess brain oxygenated hemoglobin (Oxy Hb) activation in college students with different sleep quality under the verbal fluency task (VFT), so as to better provide a theoretical basis for the neural mechanism for sleep quality improvement of college students.@*Methods@#A simple random sampling method was used to investigate 96 college students from one university during 2020 and 2021. According to the results of the Pittsburgh Sleep Quality Index(PSQI), participants were divided into 3 groups: good sleep quality group( n =45), moderate group( n =33), and poor group( n =18). The 53 channel near infrared spectroscopy to collect cerebral blood oxygen signals under the VFT task. Association between oxygenated hemoglobin with sleep quality was analyzed.@*Results@#About 18.75% of college students reported sleep quality problems, including long sleep latency (0.97±0.97) and poor subjective sleep quality (0.96±0.72). There was a significant negative correlation between PSQI score and average oxygenated hemoglobin (Avg HbO) index of dorsolateral prefrontal lobe ( r =-0.23, P =0.03). The Avg HbO index differed significantly between good and poor sleep quality groups on dorsolateral prefrontal lobe( P =0.05).@*Conclusion@#This study verified that there is a positive correlation between sleep quality and cognitive ability among college students. The fNIRS technique could accurately collect blood oxygen signals from dorsolateral prefrontal lobe during cognitive tasks, which proves to be an effective tool for identifying sleep quality of college students.
Résumé
BACKGROUND: The current diagnosis and study of depression lacks objective biological indicators. As an emerging non-invasive brain functional imaging technology, functional near infrared spectroscopy (fNIRS) may be a potential biomarker for the identification and diagnosis of depression. OBJECTIVE: To review the application of fNIRS technique in depression research and provide guidance for clinical research. METHODS: The keywords were “functional near-infrared spectroscopy, oxyhemoglobins, prefrontal cortex, depressive disorder.” The first author searched CNKI, WanFang, VIP, PuMed and Web of Science database from 1996 to 2020 in Chinese and English. Finally, 50 literatures were selected for review. RESULTS AND CONCLUSION: fNIRS signal may be a potential biomarker for depression. fNIRS technology is mainly used to study the cognitive dysfunction of depression based on the frontal lobe hemodynamic changes, which can be used for the differential diagnosis of depression. However, the current research on fNIRS is still in the exploratory stage, and there are still some defects in the existing research, which need to be further optimized and deepened in the future research. It can increase the study sample size and monitoring indicators, and integrate fNIRS with other technologies to improve the temporal and spatial resolution, so as to study the neural mechanism of depression systematically, comprehensively and accurately.
Résumé
Objective To investigate the effect of arterial and venous subarachnoid hemorrhage ( SAH)on voltage-dependent calcium channel( VDCC)currents of cerebral artery smooth muscle cells and the relationship between the concentration of oxyhemoglobin( OxyHb)in arterial and venous blood and cerebral blood flow. Methods Thirty-six clean grade rats were colleted. A rat SAH model was induced by injection of autologous arterial or venous blood in suprasellar cistern using assisted stereotaxic apparatus. The rats were divided into three groups:an arterial SAH( n=14 ),a venous SAH( n=13 ),and a sham operation( n=9 )group. The arterial and venous OxyHb concentrations were measured. Three days after SAH modeling,a patch clamp was used to detect the relative surface area of the cerebral artery smooth muscle cells,resting potential,and VDCC currents in rats. A fluorescent microsphere method was used to quantitatively analyze cerebral blood flow(CBF). Results (1)Arterial SAH OxyHb concentration (127 ± 4 g/L)was significantly higher than venous SAH OxyHb concentration(54 ± 6 g/L),and that of the sham operation group was 50 ± 5 g/L. The differences were statistically significant among the 3 groups( P<0. 01).(2)The maximum current of VDCC of the arterial SAH group(3. 22 ± 0. 31 pA)was significantly higher than that of the venous SAH group(2. 19 ± 0. 27 pA)and the sham operation group(2. 18 ± 0. 29 pA). The differences were statistically significant among the 3 groups( P<0. 01 ). The VDCC currents of the arterial SAH group were consisted of L- and R-currents,while the currents of the venous SAH group were only consisted of L-VDCC.(3)The cerebral blood flow of the arterial SAH group(0. 83 ± 0. 14 mL/[g·min])was significantly higher than that of the venous SAH group(1. 28 ± 0. 28 mL/[g·min])and the sham operation group(1. 35 ± 0. 19 mL/[g·min]). The differences were statistically significant(P<0. 01). Conclusions The changing effect of arterial SAH on the expression and function of the cerebral artery smooth muscle cells are greater than that of the venous SAH. This difference may be associated with the concentration and composition of vasospasm factors of OxyHb in arterial and venous blood.