AJGP:老年人的脑白质高信号、静止状态功能连接性和认知功能的关系

2022-08-05 MedSci原创 MedSci原创

研究结果强调了静止状态网络中的脑网络结构和功能改变的作用,这些改变与WMH有关,并影响老年人的记忆。

某些老人出现头痛或记忆减退,到医院做头部磁共振显示“脑白质高信号”,非常惊慌,以为脑子里长了东西。其实,“脑白质高信号”是影像学的一种专业描述,并非疾病名称。研究显示,60岁以上人群中,脑白质高信号出现率超90%。

白质高信号(WMH)与认知功能的缺陷有关,包括认知控制和记忆。然而,其结构和功能机制在很大程度上是未知的。为此,来自美国的学者研究了来自WMH的白质纤维束的估计区域破坏、静息状态功能连接(RSFC)和老年人的认知功能之间的关系。

该研究为一项基于社区的横断面研究。共纳入58名认知健康的老年人。对认知控制和记忆的任务,结构性核磁共振成像和静止状态的核磁共振成像进行检查。评估了WMH对白质纤维束的破坏,以及它对皮质和皮质下额叶网络、缺省模式网络和腹侧注意网络的灰质区域的影响,并计算这些相同网络中各节点之间的RSFC。此外还评估了区域WMH负担和RSFC在预测认知控制和记忆方面的相互作用。

结果显示默认模式网络和额叶网络的皮质-纹状体区域的估计区域WMH负担和RSFC的相互作用与延迟回忆有关。预测工作记忆、认知抑制和集合转移的模型并不显著。

研究结果强调了静止状态网络中的脑网络结构和功能改变的作用,这些改变与WMH有关,并影响老年人的记忆。

参考文献:

Estimated Regional White Matter Hyperintensity Burden, Resting State Functional Connectivity, and Cognitive Functions in Older Adults. doi: 10.1016/j.jagp.2021.07.015.

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    2023-02-11 yaanren
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    2023-01-19 minzju5052
  4. [GetPortalCommentsPageByObjectIdResponse(id=1950744, encodeId=d2291950e44c2, content=<a href='/topic/show?id=c5fe990913b' target=_blank style='color:#2F92EE;'>#静止状态#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=51, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=99091, encryptionId=c5fe990913b, topicName=静止状态)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=583c133, createdName=yuandd, createdTime=Tue Nov 15 15:27:00 CST 2022, time=2022-11-15, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1814154, encodeId=1d75181415487, content=<a href='/topic/show?id=555e9453390' target=_blank style='color:#2F92EE;'>#连接性#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=44, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=94533, encryptionId=555e9453390, topicName=连接性)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=102a153, createdName=yaanren, createdTime=Sat Feb 11 01:27:00 CST 2023, time=2023-02-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2057364, encodeId=8477205e364fb, content=<a href='/topic/show?id=18982222db' target=_blank style='color:#2F92EE;'>#AJG#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=46, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=2222, encryptionId=18982222db, topicName=AJG)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=2978132, createdName=minzju5052, createdTime=Thu Jan 19 20:27:00 CST 2023, time=2023-01-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1950859, encodeId=6e0a195085960, content=<a href='/topic/show?id=20101021e97e' target=_blank style='color:#2F92EE;'>#高信号#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=35, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=102179, encryptionId=20101021e97e, topicName=高信号)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=08e4137, createdName=meichuangyi, createdTime=Thu Jun 29 04:27:00 CST 2023, time=2023-06-29, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1765987, encodeId=fb541e6598748, content=<a href='/topic/show?id=252ae1803a3' target=_blank style='color:#2F92EE;'>#白质#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=55, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=71803, encryptionId=252ae1803a3, topicName=白质)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=778d36, createdName=柳叶一刀, createdTime=Tue Feb 07 17:27:00 CST 2023, time=2023-02-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1417596, encodeId=1e3f141e59633, content=<a href='/topic/show?id=c667e181616' target=_blank style='color:#2F92EE;'>#白质高信号#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=54, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=71816, encryptionId=c667e181616, topicName=白质高信号)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=44693296090, createdName=zhangph, createdTime=Thu Aug 04 01:27:00 CST 2022, time=2022-08-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1445809, encodeId=ae941445809cf, content=<a href='/topic/show?id=a343329413c' target=_blank style='color:#2F92EE;'>#功能连接#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=41, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=32941, encryptionId=a343329413c, topicName=功能连接)], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/Q0j4TwGTfTJciayulicXZn6VO5hXfUv98oceXTHpMayS6T4PrSPsgsN6Jt2kCyAo9tAQwf1jCiaw4y8lxZFBA5nJg/132, createdBy=5ddb5182578, createdName=showtest, createdTime=Thu Aug 04 01:27:00 CST 2022, time=2022-08-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1506837, encodeId=5395150683eb9, content=<a href='/topic/show?id=a1af849e063' target=_blank style='color:#2F92EE;'>#脑白质高信号#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=38, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=84970, encryptionId=a1af849e063, topicName=脑白质高信号)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=79949824561, createdName=rgjl, createdTime=Thu Aug 04 01:27:00 CST 2022, time=2022-08-04, status=1, ipAttribution=)]
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该研究没有发现在伤后亚急性期使用DTI-ALPS指数在脑室周围白质中发现与轻度TBI相关的淋巴系统功能障碍的证据。

J CEREBR BLOOD F M:24小时血压变异性和脑白质高信号患病率和进展的关系

夜间舒张压勺状降低消失和24小时舒张压ARV与较高的WMH体积相关。虽然需要重复,但这些结果表明血压模式和变异性可能是预防小血管疾病的一个靶点。