A structural MRI study on semantic dementia
<p><strong>Objective</strong> To analyze the structural changes of cerebral gray and white matter in patients with semantic dementia (SD), and to promote the knowledge of its pathological changes and mechanisms. <strong>Methods</strong> Sixteen SD patients and 17 nor...
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| Format: | Article |
| Language: | English |
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Tianjin Huanhu Hospital
2014-04-01
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| Series: | Chinese Journal of Contemporary Neurology and Neurosurgery |
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| Online Access: | http://www.cjcnn.org/index.php/cjcnn/article/view/932 |
| _version_ | 1819030403981246464 |
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| author | Zheng ZHAO Yan-hui YANG Chun-ming LU Ai-hong ZHOU Kun-cheng LI |
| author_facet | Zheng ZHAO Yan-hui YANG Chun-ming LU Ai-hong ZHOU Kun-cheng LI |
| author_sort | Zheng ZHAO |
| collection | DOAJ |
| description | <p><strong>Objective</strong> To analyze the structural changes of cerebral gray and white matter in patients with semantic dementia (SD), and to promote the knowledge of its pathological changes and mechanisms. <strong>Methods</strong> Sixteen SD patients and 17 normal controls were scanned with a 3.0T MR scanner and the whole brain three?dimensional high-resolution structural images and diffusion tensor imaging (DTI) images were acquired. The gray matter density and fractional anisotropy (FA) values of white matter fiber tracts were analyzed by professional statistical softwares or packages respectively. The statistical analysis of gray matter density and FA values between 2 groups were processed by two sample t test, and the statistical threshold were set as <em>P</em> < 0.001, Voxel > 338 and <em>P</em> < 0.001, Voxel > 103 respectively. <strong>Results</strong> Compared with the healthy controls, SD patients appeared significantly reduced gray matter density in bilateral temporal lobes, particularly in temporal pole. In addition, SD group showed more areas with grey matter loss in the left cerebral hemisphere, including the left inferior temporal gyrus, left supramarginal gyrus, left inferior parietal gyrus and left middle frontal gyrus. SD group also showed an obviously lower FA value in bilateral white matters of temporal lobe, including bilateral uncinate fasciculus, left cingulum (hippocampus) and bilateral fronto-occipital fasciculus. The abnormal areas of gray matter and white matter showed a high consistency in their anatomical connection. <strong> Conclusions</strong> The study helps to reveal the pathological and anatomical basis of semantic dementia, and provides objective evidence for understanding the pathogenesis of semantic dementia.</p><p> </p><p>doi: 10.3969/j.issn.1672-6731.2014.04.007</p> |
| first_indexed | 2024-12-21T06:29:37Z |
| format | Article |
| id | doaj.art-f33649adf78f4660b60396b6b314a4dd |
| institution | Directory Open Access Journal |
| issn | 1672-6731 |
| language | English |
| last_indexed | 2024-12-21T06:29:37Z |
| publishDate | 2014-04-01 |
| publisher | Tianjin Huanhu Hospital |
| record_format | Article |
| series | Chinese Journal of Contemporary Neurology and Neurosurgery |
| spelling | doaj.art-f33649adf78f4660b60396b6b314a4dd2022-12-21T19:13:01ZengTianjin Huanhu HospitalChinese Journal of Contemporary Neurology and Neurosurgery1672-67312014-04-01144298302931A structural MRI study on semantic dementiaZheng ZHAO0Yan-hui YANG1Chun-ming LU2Ai-hong ZHOU3Kun-cheng LI4Department of Radiology, Xuanwu Hospital, Beijing Key Laboratory of Magnetic Resonance Imaging and Brain Informatics, Key Laboratory for Neurodegenerative Diseases of Ministry of Education, Capital Medical University, Beijing 100053, ChinaDepartment of Radiology, Xuanwu Hospital, Beijing Key Laboratory of Magnetic Resonance Imaging and Brain Informatics, Key Laboratory for Neurodegenerative Diseases of Ministry of Education, Capital Medical University, Beijing 100053, ChinaNational Key Laboratory of Cognitive Neuroscience and Learning & IDG/McGovern Institute for Brain Research, Beijing Normal University, Beijing 100875, ChinaDepartment of Neurology, Xuanwu Hospital, Capital Medical University, Beijing 100053, ChinaDepartment of Radiology, Xuanwu Hospital, Beijing Key Laboratory of Magnetic Resonance Imaging and Brain Informatics, Key Laboratory for Neurodegenerative Diseases of Ministry of Education, Capital Medical University, Beijing 100053, China<p><strong>Objective</strong> To analyze the structural changes of cerebral gray and white matter in patients with semantic dementia (SD), and to promote the knowledge of its pathological changes and mechanisms. <strong>Methods</strong> Sixteen SD patients and 17 normal controls were scanned with a 3.0T MR scanner and the whole brain three?dimensional high-resolution structural images and diffusion tensor imaging (DTI) images were acquired. The gray matter density and fractional anisotropy (FA) values of white matter fiber tracts were analyzed by professional statistical softwares or packages respectively. The statistical analysis of gray matter density and FA values between 2 groups were processed by two sample t test, and the statistical threshold were set as <em>P</em> < 0.001, Voxel > 338 and <em>P</em> < 0.001, Voxel > 103 respectively. <strong>Results</strong> Compared with the healthy controls, SD patients appeared significantly reduced gray matter density in bilateral temporal lobes, particularly in temporal pole. In addition, SD group showed more areas with grey matter loss in the left cerebral hemisphere, including the left inferior temporal gyrus, left supramarginal gyrus, left inferior parietal gyrus and left middle frontal gyrus. SD group also showed an obviously lower FA value in bilateral white matters of temporal lobe, including bilateral uncinate fasciculus, left cingulum (hippocampus) and bilateral fronto-occipital fasciculus. The abnormal areas of gray matter and white matter showed a high consistency in their anatomical connection. <strong> Conclusions</strong> The study helps to reveal the pathological and anatomical basis of semantic dementia, and provides objective evidence for understanding the pathogenesis of semantic dementia.</p><p> </p><p>doi: 10.3969/j.issn.1672-6731.2014.04.007</p>http://www.cjcnn.org/index.php/cjcnn/article/view/932DementiaFrontal lobeTemporal lobeMagnetic resonance imaging |
| spellingShingle | Zheng ZHAO Yan-hui YANG Chun-ming LU Ai-hong ZHOU Kun-cheng LI A structural MRI study on semantic dementia Chinese Journal of Contemporary Neurology and Neurosurgery Dementia Frontal lobe Temporal lobe Magnetic resonance imaging |
| title | A structural MRI study on semantic dementia |
| title_full | A structural MRI study on semantic dementia |
| title_fullStr | A structural MRI study on semantic dementia |
| title_full_unstemmed | A structural MRI study on semantic dementia |
| title_short | A structural MRI study on semantic dementia |
| title_sort | structural mri study on semantic dementia |
| topic | Dementia Frontal lobe Temporal lobe Magnetic resonance imaging |
| url | http://www.cjcnn.org/index.php/cjcnn/article/view/932 |
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