Ideomotor apraxia and functional ability
Ideomotor apraxia and functional ability
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DOI：
10.1016/s0010-9452(08)70461-1
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发表时间：
2007-04-01
期刊：
影响因子：
3.6
通讯作者：
Shinner, Caroline
中科院分区：
文献类型：
--
作者：
Sunderland, Alan;Shinner, Caroline
认知失用症（IMA）对功能能力的影响一直是一个相对被忽视的研究课题。这是由于持续关注手势模仿和工具使用哑剧的表现，以及广泛接受的轶事证据表明，IMA在直接操纵物体时没有效果。越来越多的研究表明，IMA确实会导致处理物体时的笨拙增加，并可能导致日常生活中的残疾。然而，与手势模仿和哑剧的明显异常相比，这种影响似乎相对温和。对此的传统解释是，自然主义语境提供的线索提高了动作表征的检索，但另一种解释涉及特定任务的认知需求。简单的运动任务的表现可以成功地由物理启示指导，而运动任务可能会失败，如果他们需要记忆或解决问题的能力的支持。IMA的中枢缺陷可能是姿势表征受损，导致无法解决如何操纵物体的问题，其中既没有启示也没有记忆可以决定行动。然而，这种解释仍然无法完全解释在复杂的自然主义任务（如穿衣）中看到的错误模式。未来的研究需要进一步了解IMA如何映射到残疾，这将对理论构建和治疗干预产生影响。
The impact of ideomotor apraxia (IMA) on functional ability has been a relatively neglected topic in research. This has been due to the continued focus on performance on gesture imitation and pantomime of tool-use, together with widespread acceptance of anecdotal evidence that IMA has no effect when directly manipulating objects. An increasing number of studies have shown that IMA does in fact result in increased clumsiness when handling objects and may contribute to disability in everyday life. However the effect seems relatively mild compared to the stark abnormalities on gesture imitation and pantomime. The conventional explanation for this is that the cues provided by naturalistic contexts improve retrieval of action representations, but an alternative account concerns task-specific cognitive demands. Performance on simple prehensile tasks can be successfully guided by physical affordances whereas motor tasks may be failed if they require the support of memory or problem solving ability. A central deficit in IMA may be impaired postural representation causing inability to solve the problem of how to manipulate objects where neither affordance nor memory can dictate action. However, this account still fails to explain fully the patterns of error seen on complex naturalistic tasks such as dressing. Future research needs to further our understanding of how IMA maps on to disability, which will have implications for theory building and for therapeutic intervention.