All posts filed under: Neuroscience

Traumatic Brain injury impairs small-world topology

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Neuroscience / StudynWorks

ABSTRACT Objective: We test the hypothesis that brain networks associated with cognitive function shift away from a “small-world” organization following traumatic brain injury (TBI). Methods: We investigated 20 TBI patients and 21 age-matched controls. Resting-state functional MRI was used to study functional connectivity. Graph theoretical analysis was then applied to partial correlation matrices derived from these data. The presence of white matter damage was quantified using diffusion tensor imaging. Results: Patients showed characteristic cognitive impairments as well as evidence […]

2012 KHBM Conference

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Neuroscience / StudynWorks

  2012년도 대한뇌기능매핑학회 추계 학술대회 • 주제: TBSS (tract-based spatial statistics, DTI processing software) • 일시: 2012년 11월 1일(목) 10:00 ~ 18:00 • 주관: 한양대학교 의용생체공학과 전산뇌영상분석 연구실 • 장소: 한양대학교 • 일시: 2012년 11월 2일(금) 9:30-18:00 • 장소: 서울아산병원 연구관 지하 강당 09:30-09:50 등록 09:50-10:00 환영사 개회사 이동수 회장, 이용호 이사장 10:00-12:00 대한 뇌기능매핑학회 10주년 기념 Symposium: Past, Present and Future of Brain mapping – 좌장: 김선일(한양대), 이명철(가천대) 대강당 · 박현욱(KAIST 전기및전자공학과) The MRI Technology: The Past and Next 10 Years […]

Effects of bilateral eye movements on gist based false recognition in the DRM paradigm

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Neuroscience / StudynWorks

The effects of saccadic bilateral(horizontal) eye movements on gist based false recognition was investigated. Following exposure to lists of words related to a critical but non-studied word participants were asked to engage in 30s of bilateral vs. vertical vs. no eye movements. Subsequent testing of recognition memory revealed that those who undertook bilateral eye movement were more likely to correctly recognise previously presented words and less likely to falsely recognise critical non-studied associates. This result […]

DKI:Diffusional Kurtosis Imaging

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Neuroscience / StudynWorks

A magnetic resonance imaging method is presented for quantifying the degree to which water diffusion in biologic tissue is non-Gaussian. Since tissue structure is responsible for the deviation of water diffusion from the Gaussian behaviour typically observed in homogeneous solutions, this method provides a specific measure of tissue structure, such as cellular compartments and membranes. The method is an extension of conventional diffusion-weighted imaging that requires the use of somewhat higher b values and a […]

Diffusion MRI – HARDI

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Neuroscience / StudynWorks

The methods of group theory are applied to the problem of characterizing the diffusion measured in high angular resolution MR experiments. This leads to a natural representation of the local diffusion in terms of spherical harmonics. In this representation, it is shown that isotropic diffusion, anisotropic diffusion from a single finer, and anisotropic diffusion from multiple fiber directions fall into distinct and separable channels. This decomposition can be determined for any voxel without any prior […]