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Neurology:植物人也会痛?

2013-01-04 Neurology 网络 geniusgodyu

     一位无反应性清醒综合征患者对精神图像刺激均有正常反应   近期的文章显示使用意向指令、脑激活模式发现10%的无反应性清醒综合征(UWS,之前称为植物状态)患者存在意识。但是也有可能,无法依从指令的患者(如由于记忆、注意能力受限)能够感知疼痛和愉悦,并留有情绪能力。德国海德堡大学医学心理学与行为性神经生物研究所的Boris Kotchoubey博士等人进行了一项研究,在一个特

  

  一位无反应性清醒综合征患者对精神图像刺激均有正常反应

  近期的文章显示使用意向指令、脑激活模式发现10%的无反应性清醒综合征(UWS,之前称为植物状态)患者存在意识。但是也有可能,无法依从指令的患者(如由于记忆、注意能力受限)能够感知疼痛和愉悦,并留有情绪能力。德国海德堡大学医学心理学与行为性神经生物研究所的Boris Kotchoubey博士等人进行了一项研究,在一个特定的脑结构网络(称为脑的痛感矩阵,即PM)评估无反应性清醒综合征患者残存的情感意识能力,研究结果在线发表在2012年12月19日的Neurology杂志上。研究结果显示:无反应性清醒综合征患者中有很多能够对其他人发出的疼痛信号做出反应。猜测“情感意识”能够在脑部损伤非常严重的患者(已经没有认知能力)保留。

  研究人员对2个影像中心中严格诊断的UWS患者进行检查。使用fMRI观察脑对意向指令和疼痛呼喊声(相对于中性的人类发声)的血液动力学反应。

  研究结果发现:与其他研究结果进行线性对比发现:5个患者对意向指令的反应是一致的。相反,24位患者在呼喊声中出现痛感矩阵的激活。痛感矩阵由一个感觉亚系统(构成疼痛感觉)和一个情感亚系统(构成疼痛的特征性厌恶情绪)组成。前者在34%的患者被激活,后者30%的患者被激活。

  该研究发现:尽管无反应性清醒综合征患者是否能够感知疼痛存在争议,试验结果显示他们中的很多人能够对其他人给予的疼痛信号做出反应。猜测“情感意识”甚至能够在脑部损伤非常严重的患者(已经没有认知能力)保留。


Patients with unresponsive wakefulness syndrome respond to the pain cries of other people

Objective: Recent publications show that using imagery instructions, brain activation patterns indicating consciousness can be found in approximately 10% of patients with unresponsive wakefulness syndrome (UWS; previously called vegetative state). It is possible, however, that patients who cannot follow instructions (because of limited memory/attention capacities, for example) are nevertheless conscious and retain emotional abilities to feel pain and pleasure. The aim of this study was to assess residual affective consciousness in a specific network of brain structures, the so-called pain matrix (PM) of the brain.

Methods: We examined 44 carefully diagnosed UWS patients at 2 imaging centers. fMRI was used to investigate the brain hemodynamic responses to (a) imagery instructions, and (b) pain cries as opposed to neutral human vocalizations.

Results: In line with the data of other groups, consistent responses to imagery instructions were obtained in 5 patients. In contrast, the PM was activated by pain cries in 24 patients. The PM consists of a sensory subsystem, which underlies pain sensation, and an affective subsystem, which underlies the characteristic aversive emotional tone of pain. The former was activated in 34% of patients, the latter in 30% of patients.

Conclusion: Although there is debate about whether patients with UWS can perceive their own pain, our data indicate that many of them respond to the signals of pain in others. One can speculate that “affective consciousness” can remain even in patients with very severe brain damage who have no capacity for cognition. 

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    2013-04-07 xjy02
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  3. [GetPortalCommentsPageByObjectIdResponse(id=2008947, encodeId=633c200894e7d, content=<a href='/topic/show?id=4875626990e' target=_blank style='color:#2F92EE;'>#植物人#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=97, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=62699, encryptionId=4875626990e, topicName=植物人)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=d59291, createdName=xjy02, createdTime=Sun Apr 07 23:52:00 CST 2013, time=2013-04-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1745156, encodeId=372e1e45156a0, content=<a href='/topic/show?id=bdc262694bb' target=_blank style='color:#2F92EE;'>#植物#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=62, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=62694, encryptionId=bdc262694bb, topicName=植物)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=4c37265, createdName=医者仁心, createdTime=Thu Mar 07 04:52:00 CST 2013, time=2013-03-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1999248, encodeId=252c199924856, content=<a href='/topic/show?id=d5df12695e6' target=_blank style='color:#2F92EE;'>#Neurol#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=91, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=12695, encryptionId=d5df12695e6, topicName=Neurol)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=8217292, createdName=yinhl1978, createdTime=Wed Feb 13 03:52:00 CST 2013, time=2013-02-13, status=1, ipAttribution=)]
    2013-02-13 yinhl1978
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