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structural and functional connectivity of the whole brain and subnetworks in individuals with mild traumatic brain injury:predictors of patient prognosis

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Neural Regeneration Research 2024年第7期19卷 1553-1558页

作者： Sihong Huang Jungong Han Hairong Zheng Mengjun Li Chuxin Huang Xiaoyan Kui Jun Liu Department of Radiology The Second Xiangya HospitalCentral South UniversityChangshaHunan ProvinceChina Department of Computer Science Aberystwyth UniversityAberystwythCeredigionUK Shenzhen Institutes of Advanced Technology Chinese Academy of SciencesShenzhenGuangdong ProvinceChina School of Computer Science and Engineering Central South UniversityChangshaHunan ProvinceChina Department of Radiology Quality Control Center of Hunan ProvinceChangshaHunan ProvinceChina Clinical Research Center for Medical Imaging of Hunan Province ChangshaHunan ProvinceChina

Patients with mild traumatic brain injury have a diverse clinical presentation,and the underlying pathophysiology remains poorly understood.Magnetic resonance imaging is a non-invasive technique that has been widely utilized to investigate neuro biological markers after mild traumatic brain injury.This approach has emerged as a promising tool for investigating the pathogenesis of mild traumatic brain injury.G raph theory is a quantitative method of analyzing complex networks that has been widely used to study changes in brain structure and function.However,most previous mild traumatic brain injury studies using graph theory have focused on specific populations,with limited exploration of simultaneous abnormalities in structural and functional connectivity.Given that mild traumatic brain injury is the most common type of traumatic brain injury encounte red in clinical practice,further investigation of the patient characteristics and evolution of structural and functional connectivity is critical.In the present study,we explored whether abnormal structural and functional connectivity in the acute phase could serve as indicators of longitudinal changes in imaging data and cognitive function in patients with mild traumatic brain injury.In this longitudinal study,we enrolled 46 patients with mild traumatic brain injury who were assessed within 2 wee ks of injury,as well as 36 healthy controls.Resting-state functional magnetic resonance imaging and diffusion-weighted imaging data were acquired for graph theoretical network analysis.In the acute phase,patients with mild traumatic brain injury demonstrated reduced Structural connectivity in the dorsal attention network.More than 3 months of followup data revealed signs of recovery in structural and functional connectivity,as well as cognitive function,in 22 out of the 46 patients.Furthermore,better cognitive function was associated with more efficient networks.Finally,our data indicated that small-worldness in the acute stage could serve as a predictor of longitudinal ch

关键词： cognitive function cross-section follow-up functional connectivity graph theory longitudinal study mild traumatic brain injury prediction small-worldness Structural connectivity subnetworks whole brain network

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The Brain Connectome for Chinese Reading

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Neuroscience Bulletin 2022年第9期38卷 1097-1113页

作者： Wanwan Guo Shujie Geng Miao Cao Jianfeng Feng Institute of Science and Technology for Brain-Inspired Intelligence Fudan UniversityShanghai200433China Key Laboratory of Computational Neuroscience and Brain-Inspired Intelligence(Ministry of Education) Fudan UniversityShanghai200433China

Chinese,as a logographic language,fundamentally differs from alphabetic languages like English.Previous neuroimaging studies have mainly focused on alphabetic languages,while the exploration of Chinese reading is still an emerging and fast-growing research field.Recently,a growing number of neuroimaging studies have explored the neural circuit of Chinese reading.Here,we summarize previous research on Chinese reading from a connectomic perspective.Converging evidence indicates that the left middle frontal gyrus is a specialized hub region that connects the ventral with dorsal pathways for Chinese reading.Notably,the orthography-to-phonology and orthography-to-semantics mapping,mainly processed in the ventral pathway,are more specific during Chinese reading.Besides,in addition to the left-lateralized language-related regions,reading pathways in the right hemisphere also play an important role in Chinese reading.Throughout,we comprehensively review prior findings and emphasize several challenging issues to be explored in future work.

关键词： Brain connectome Chinese reading Word recognition Reading comprehension Structural connectivity Functional connectivity

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Increasing loss of mature boreal forests around protected areas with red-listed forest species

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Ecological Processes 2022年第1期11卷 319-331页

作者： Aino‑Maija Määttänen Raimo Virkkala Niko Leikola Risto K.Heikkinen Biodiversity Centre Finnish Environment InstituteLatokartanonkaari 1100790 HelsinkiFinland

Background:Protected areas(PA)are central to biodiversity,but their efficiency is challenged by human‑induced habitat loss and fragmentation.In the Fennoscandian boreal region,forestry with clearcutting is a threat to biodiversity causing the loss of mature forest elements and deterioration of ecological processes in forest landscapes,ultimately affecting PAs via declined Structural connectivity.This paper aims to(1)determine PAs with high,red‑listed species concentrations;(2)estimate the change in forest habitat around these PAs on different spatial scales;and(3)determine if forest management intensity is higher around biologically most valuable PAs.Occurrences of red‑listed forest‑dwelling species in Finland were used to identify PAs harbouring these species and to produce site‑specific importance indices.CORINE landcover data was used as a baseline for the distribution of forests to assess the cover of clear‑cuttings from 2001 to 2019 with the Global Forest Change(GFC)data set in three buffer areas around the PAs with occurrences of red‑listed species.Results:The largest proportion of clear‑cuts occurred in 1 km and 10 km buffers around the PAs in the southern and middle boreal zones,being ca.20%.This indicates that the forest habitat is degrading fast at regional and landscape levels.On the positive side,the change in forest cover was lower around the biologically most important PAs compared to other PAs with red‑listed species.Conclusions:Open and free satellite‑data based assessments of the cover and change of forests provide reliable estimates about the rates at which mature and old‑growth forests are being converted into young managed ones in Finland mainly via clear‑cuts on different scales around PAs.The rate of clear‑cuts was lowest in adjacent buffer areas next to the most species‑rich PAs,which provides opportunities for biodiversity conservation efforts to be targeted to the remaining mature and old‑growth forests found in the vicinity of these areas.

关键词： Biodiversity conservation Boreal forest Change detection Global Forest Watch Habitat loss Structural connectivity

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Intrinsic modulation between bilateral brain regions:a study of resting-state functional connectivity in rat

Intrinsic modulation between bilateral brain regions:a study...

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中国神经科学学会第十届全国学术会议

作者： Rui-qi WU Yue LIU Bo LI Fu-qiang XU The State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics Wuhan Institute of Physics and Mathematicsthe Chinese Academy of Sciences University of Chinese Academy of Sciences Wuhan National Laboratory for Optoelectronics

Objective Resting-state functional magnetic resonance imaging（rfMRI） is widely used in studying brain functional connectivity.However,the neural mechamsms and intrinsic modulations of low frequency oscillation of blood oxygen level dependent-rfMRI are still ambiguous.Methods In the present study,we investigated the functional connectivity of bilateral olfactory bulbs and cortices of rats under different brain states induced by ketamine.We also investigated the effect of severing the cross-talk nerve fibers of bilateral regions on the functional connectivity.Results The functional connectivities of bilateral olfactory bulbs and bilateral cortices were decreased under the high brain state compared to the low brain state,as well as in anterior commissure and callosum lesion brain.Conclusion These results indicated that the intrinsic modulation between bilateral brain regions will lead to a strong functional connectivity.

关键词： functional magnetic resonance imaging low frequency oscillation Structural connectivity electrolytic lesion

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