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Objective To discuss the effects of acupuncture therapy on resting state functional magnetic resonance imaging (fMRI) in patients with ischemic stroke; To explore the central mechanism of acupuncture therapy.Methods Ten is chemic stroke patients with hemiplegia limbs and ten matched control subjects were included. Treatment group was given anti-platelet aggregation, anticoagulation, and nutrition brain cell therapy. At the same time, acupuncture therapy was given, taking Jianyu, Quchi, Shousanli, Waiguan, Hegu, Zusanli, Fenglong, Yanglingquan, Sanyinjiao, and Taichong, with even reinforcing-reducing method, and retaining the needle 30 min, manipulating needle every 10 min, once a day, 5 times a week, needle stopping for 2 d, for continuous 30 d. The health group did not undergo any treatment. BOLD-fMRI imaging technique was used, and based on RSET1.8 software, the parameters of brain activity before and after treatment were observed by amplitude of low frequency fluctuation (ALFF) method. The Results were compared with healthy group. Results Before treatment, the ALFF value of left caudate nucleus, putamen and globus pallidus in the treatment group was lower than that in the health group, and the ALFF value of bilateral precentral and postcentral gyrus, left grus frontalis superior, gyrus frontalis medius, gyrus temporalis medius and precuneus was higher than the health group (P<0.05). After treatment, the ALFF value in left caudate nucleus, putamen and globus pallidus in the treatment group was higher than that before treatment, and the ALFF value in left gyrus frontalis superior, gyrus frontalis medius and precuneus decreased than before group (P<0.05).Conclusion In the resting state of the ischemic stroke patients with hemiplegia limbs, the principal injured brain regions are caudate nucleus, putamen and globus pallidus. Acupuncture has a regulatory role for these brain areas, presumably may be the central mechanism of efficacy.
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Objective To investigate brain function alteration in early onset schizophrenia by amplitude of low-frequency fluctuation (ALFF) based on resting-state functional MRI (fMRI). Method Twenty patients with early on?set schizophrenia and 20 sex, age, education years matched healthy controls underwent resting-state functional MRI. The difference in ALFF was compared between patients and controls. Result Compared with control group, the ALFF values in patient group increased in the left frontal gyrus, precuneus, cingulate cortex, occipital lobe, parahippocampal gyrus and calcarine (P<0.05, AlphaSim revised), while decreased in the right superior temporal lobe and the posterior lobe of cerebellum (P<0.05, AlphaSim revised). Conclusion There are abnormal ALFF in multiple regions in early onset schizo?phrenia, suggesting that early onset schizophrenia may have altered in resting-state brain activity.
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Objective To investigate whether resting state-fMRI (RS-fMRI) based on local consistency (ReHo), am?plitude low-frequency fluctuate (ALFF) and fALFF can add meaningful information on preoperative localization of epilepto?genic zone in patients with malformations of cortical development (MCD). Methods Ten epilepsy patients with MCD were studied with RS-fMRI using a 3.0 T scanner. The resting state data were preprocessed and analyzed using SPM8 and REST to generate the activation map. Abnormal ReHo, ALFF and fALFF related blood oxygen level dependent (BOLD) signal changes were compared to video EEG (VEEG),PET,MRI findings and the final result of a comprehensive evaluation-de?fined epileptogenic zone. For operated patients, postoperative resection and histology were compared to BOLD responses. Re?sults The results of spike localization of RS-fMRI were consistent with VEEG, PET, MRI findings and final comprehensive evaluation-defined epileptogenic zone in 6, 8, 6, 7 of 10 investigations. Six operated patients (including two negative results of MRI examination) revealed local abnormal changes but not visible on structural MRI, which was confirmed cortical malfor?mations by pathology after operation (2 heterotopia and 4 cortical dysplasia). Conclusion RS-fMRI may help to delineate the epileptic focus in epilepsy patients with MCD.
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Objective To study the changes of amplitude of low-frequency fluctuation (ALFF) of the resting state fMRI in heroin abuser (HD), and discussed its underlying neurophysiological mechanism.Methods The resting state fMRI data of 15 heroin abusers and 15 normal volunteers were analyzed by ALFF.The amplitude of the blood oxygenation level dependent activation of the resting state brain was investigated.The brain structures showing increased and decreased ALFF in TLE patients were demonstrated by comparing to normal subjects with 2-sample t -test with threshold of P＜0.05.Results Compared with normal subjects,the regions showing decreased ALFF in HD patients were distributed in right temporal lobe(45, - 30, -21 ) ,left hippocampus( - 36,- 33, - 6), right thalamus ( 24, - 12,27 ), left posterior cingulum gyrus ( - 15, - 54,24 ), right parietal lobe /precuneus ( 21, - 51,36 ), right inferior parietal lobule ( 21, - 48,78 ) and dorsal lateral aspect of the right frontal lobe(21, - 48,78) ,while ALLF of left(45, - 42,63 ) lateral frontal cortex(0 ,39,72) in HD patients was significantly higher.Conclusion HD shows abnormal brain functional organization in resting state, which may play an important role in the production, maintenance and relapse after withdrawal of heroin abuse.