Effect of acupuncture on brain activity in patients with decreasing ovarian reserve: a resting-state functional magnetic resonance imaging study.

Objective: To examine the variations in brain regions among individuals with decreasing ovarian reserve (DOR) compared to healthy controls using resting-state functional magnetic resonance imaging (rs-fMRI), and to assess the immediate effects of acupuncture stimulation on these brain regions in DOR patients.

Methods: Twenty patients diagnosed with DOR (DOR group) and twenty healthy controls (HC group) who underwent rs-fMRI scans were included. The DOR group received acupuncture and underwent a subsequent rs-fMRI scan. Amplitude of low-frequency fluctuations (ALFF) analysis was utilized to identify disparities in brain regions between DOR and HC groups, and to evaluate the immediate effects of acupuncture on DOR patients' brain regions. Common brain regions were identified as seed points for functional connectivity (FC) analysis.

Results: In this study, a total of 20 HCs and 20 patients with DOR were initially enrolled. However, due to incomplete personal information, three participants were removed from the HC group. Additionally, two DOR patients experienced symptoms such as physical discomfort and shortness of breath during the MRI scan, leading to their exclusion due to excessive head movement parameters. Consequently, 17 HCs and 16 DOR patients completed the entire study protocol. Comparative analysis revealed that DOR patients exhibited increased ALFF values in the left inferior temporal gyrus (ITG) and middle temporal gyrus (MTG), while ALFF values in the bilateral superior frontal gyrus (SFG), middle frontal gyrus (MFG), and left inferior frontal gyrus (IFG) were decreased compared to HCs. Following acupuncture intervention, ALFF values in the left SFG, MFG, and supplementary motor area (SMA) of DOR patients increased. Furthermore, functional connectivity (FC) analysis demonstrated increased connectivity of the left SFG with the bilateral calcarine sulcus and lingual gyrus post-acupuncture.

Conclusion: This study highlights abnormal neural activity in the SFG, MFG, IFG, and ACC in DOR patients compared to HCs. Acupuncture was found to regulate the activity of the SFG, bringing it closer to normal levels, and enhancing its functional connectivity with the bilateral calcarine sulcus and lingual gyrus.