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Abstract #0224

Hippocampal-cortical connections with high-resolution ex vivo and in vivo diffusion MRI of human brain at 7T

Zuozhen Cao1, Zhiyong Zhao1, Qinfeng Zhu1, Keqing Zhu2, Jing Zhang3, and Dan Wu1
1Department of Biomedical Engineering, Zhejiang University, HangZhou, China, 2China Brain Bank and Department of Neurology in Second Affiliated Hospital, Zhejiang University, HangZhou, China, 3Department of Pathology, The First Affiliated Hospital and School of Medicine, Zhejiang University, HangZhou, China

Synopsis

Keywords: Brain Connectivity, Diffusion/other diffusion imaging techniques, Ex-vivo, hippocampus, structure connectivityHippocampus is a critical brain structure associated with many brain functions. The connectivity between hippocampal sub-regions and cerebral cortex hasn’t been fully characterized, and spatial resolution is the key to resolve such connectivity. We utilized 3D high-resolution ex vivo diffusion MRI (dMRI) at 7T to investigate the structure connectivity between hippocampal sub-regions and cortex and compared the results with in vivo data. We found that different sub-regions demonstrated unique fiber projections to cortex, and the high-resolution ex-vivo dMRI resulted in more connections with temporal-occipital lobe and less connections to central gyrus and frontal lobe, compared to lower-resolution in vivo dMRI.

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