Modulation of cerebral cortex activity by acupuncture in patients with prolonged disorder of consciousness: An fNIRS study.

Background and objective: Acupuncture is a promising non-pharmacological therapy for patients with prolonged disorder of consciousness (PDOC); however, its underlying mechanism remains uncertain. This study aimed to reveal the modulatory effects of acupuncture on the cerebral cortex activity among patients with PDOC. Materials and methods: Twenty-eight PDOC patients were randomly assigned to the treatment (n = 14) or control (n = 14) group. The treatment group received one session of acupuncture, while the control group received one session of sham acupuncture. All patients underwent evaluation of the functional connectivity and activation response of the dorsolateral prefrontal cortex (DLPFC), primary motor cortex (M1), and primary somatosensory cortex (S1) via functional near-infrared spectroscopy. We further explored the potential correlation of the consciousness level and activation response/functional connectivity with acupuncture. Results: Compared to the control group, a single session of acupuncture significantly tended to enhance resting-state functional connectivity (rsFC) in DLPFC-M1, DLPFC-M1, and S1-S1. And the activation level of the DLPFC (both sides) in the acupuncture group is significantly higher than those in sham acupuncture group. However, no significant correlation was found between the consciousness level and activation response/functional connectivity. Conclusion: One session of acupuncture has a significant modulation of rsFC and activation in the DLPFC, M1, and S1 with PDOC patients. Acupuncture-evoked effect may have some functional significance in PDOC patients. This is an important step toward exploring the acupuncture effects on PDOC patients.

The optimum parameters and neuroimaging mechanism of repetitive transcranial magnetic stimulation to post-stroke cognitive impairment, a protocol of an orthogonally-designed randomized controlled trial.

OBJECTIVE: Repetitive Transcranial Magnetic Stimulation (rTMS) has been used in cognition impairment due to various neuropsychiatric disorders. However, its optimum parameters and the neuroimaging mechanism are still of uncertainty. In order to simulate a study setting as close to real world as possible, the present study introduces a new orthogonally-designed protocol, consisting of the rTMS intervention with four key parameters (stimulating site, frequency, intensity and pulse number) and three different levels in each one, and aims to investigate the optimum parameters and the brain activity and connectivity in default mode network (DMN), dorsal attention network (DAN), central executive network (CEN) following rTMS intervention to post-stroke cognition impairment (PSCI). METHODS: A single-center, orthogonally-designed, triple-blind randomized controlled trial will be conducted and forty-five PSCI patients will be recruited and randomly assigned to one of nine active rTMS groups based on four rTMS paraments: stimulating site, frequency, intensity and pulse number. Neuropsychological, activities of daily living, quality of life and functional magnetic resonance imaging (fMRI) evaluations were be performed pre-, post- and 3 months after rTMS. DISCUSSION: This study evaluates the optimum parameters of rTMS for patients with post-stroke cognition impairment and explores the alteration of neural function in DMN, DAN, CEN brain network. These results would facilitate the standardized application of rTMS in cognition impairment rehabilitation.

Effect of Specific Acupuncture Therapy Combined with Rehabilitation Training on Incomplete Spinal Cord Injury: A Randomized Clinical Trial.

Acupuncture therapies were used to treat spinal cord injury (SCI) and its complications. To assess the effect of a specific acupuncture therapy combined with rehabilitation training for inpatients with incomplete SCI, we conducted an assessor-blinded, randomized controlled clinical trial in the Department of Rehabilitation Medicine Center in West China Hospital, Sichuan University. Seventy-two participants diagnosed with incomplete SCI were randomly assigned into 3 groups of 24 patients each, with data collection completed in December, 2019. Participants were randomly assigned (1 : 1 : 1) to 3 groups to receive treatment for 4 weeks, 5 times/week of acupuncture for Continuous Acupuncture Treatment (CAT) group, 3 times/week for Intermittent Acupuncture Treatment (IAT) group, and no acupuncture for Control group; all 3 groups received routine rehabilitation training. The primary outcome was the change of American Spinal Injury Association (ASIA) motor score from baseline to week 4. Secondary outcomes included sensory score, Modified Barthel Index (MBI). At week 4, CAT group had a higher motor score and MBI score increase than the control group (mean difference 10.52, 17.36; p < 0.001, p < 0.01, respectively). CAT group had more increase in motor score and MBI than IAT group (mean difference 5.55, 14.77; p < 0.05, p < 0.05, respectively). But the difference among groups in the increase of sensory score was not statistically significant. Acupuncture resulted in a higher motor score and MBI after 4 weeks. And the dosage of 5/week led to more improvement in motor score and MBI than that of 3/week. The results suggested that a dosage of 5/week of acupuncture is safe and more effective for SCI than 3/week. But further research is needed to determine the best intervention dosage, long-term efficacy, and underlying mechanism. This trial is registered with ChiCTR1900021530.