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首页> 外文期刊>American Journal of Neuroradiology >Memory Lateralization with 2 Functional MR Imaging Tasks in Patients with Lesions in the Temporal Lobe
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Memory Lateralization with 2 Functional MR Imaging Tasks in Patients with Lesions in the Temporal Lobe

机译：颞叶病变患者的2个功能性MR成像任务的记忆偏侧化

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BACKGROUND: Previous studies to determine memory lateralization with functional MR imaging (fMRI) have used encoding or recall tasks. The convergence between the results of both tasks, however, is unknown. OBJECTIVE: The objective of this study was to investigate hemispheric asymmetries of temporal lobe activity (parahippocampus and fusiform gyri) in patients with temporal lesions by using both kinds of fMRI tasks. METHODS: By using blood oxygenation level–dependent fMRI, hemispheric asymmetries of 25 consecutive patients admitted for presurgical evaluation of memory and 12 healthy control participants were studied. Activation was induced by using the picture-encoding task (processing of complex scenes) and the hometown-walking task (requiring mental navigation through one’s hometown by using landmarks given by participants themselves). RESULTS: Results in the control group showed that both tasks activated the parahippocampus similarly. The picture-encoding task, however, yielded greater posterior activations in the parahippocampus than did the hometown-walking task. As observed in other studies, more than half the patients showed contralesional representation of memory in each task. It is important to note that estimated memory lateralization from each task was different in 30% of patients, and several cases showed clear discrepancies between both tasks. CONCLUSION: Although previous studies showed that both tasks were useful for evaluating memory lateralization, the present study suggested that the administration of both tasks is necessary for presurgical evaluation of memory lateralization in patients with lesions in the temporal lobe. Therefore, both encoding and recall processes should at least be considered in the evaluation of memory.
机译：背景：以前使用功能性MR成像（fMRI）确定记忆横向化的研究已经使用了编码或调用 任务。但是，这两个任务的结果之间的收敛性是未知的。 目的：本研究的目的是研究颞叶的半球 不对称性同时使用两种功能磁共振成像任务进行颞部病变患者的活动（海马旁和梭状体 gyri）活动。 方法：采用血液氧合水平依赖性功能磁共振成像， 半球不对称性的连续25例患者接受了 的术前记忆评估，并研究了12名健康对照组的参与者。通过使用 图片编码任务（处理复杂场景）和 家乡步行任务（需要通过一个人的 家乡进行心理导航）来诱导激活结果：对照组的结果表明，两个任务 都相似地激活了海马旁。但是，图片编码 任务比家乡行走任务在 旁海马体中产生了更大的后部激活。在其他研究中观察到的 ，超过一半的患者在每项任务中都显示了对立的记忆力。重要的是要注意 ，每项任务的估计记忆偏侧在30％的患者中是不同的 ，并且几例显示出两个任务之间的明显差异 结论。尽管先前的研究表明这两个任务对评估记忆的侧倾性都非常有用，但目前的研究表明，这两个任务的管理都是必要的。 用于颞叶病变的患者 的术前评估。因此，至少应在内存的评估 中同时考虑编码 和调用过程。

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  • 来源
    《American Journal of Neuroradiology》 |2006年第3期|00000498-00000503|共6页
  • 作者

    C. ávila; A. Barrós-Loscertales; C. Forn; R. Mallo; M.-A. Parcet; V. Belloch; S. Campos; R. Feliu-Tatay; J.M. González-Darder;

  • 作者单位

    Department of Basic & Clinical Psychology and Psychobiology, Universitat Jaume I, Castelló de la Plana, Spain;

    Department of Basic & Clinical Psychology and Psychobiology, Universitat Jaume I, Castelló de la Plana, Spain;

    Department of Basic & Clinical Psychology and Psychobiology, Universitat Jaume I, Castelló de la Plana, Spain;

    Department of Basic & Clinical Psychology and Psychobiology, Universitat Jaume I, Castelló de la Plana, Spain;

    Department of Basic & Clinical Psychology and Psychobiology, Universitat Jaume I, Castelló de la Plana, Spain;

    Department of Radiology, Exploraciones Radiológicas Especiales SA, Valencia, Spain;

    Department of Radiology, Exploraciones Radiológicas Especiales SA, Valencia, Spain;

    Neurosurgery Service, Castellón General Hospital, Castellón, Spain;

    Neurosurgery Service, Castellón General Hospital, Castellón, Spain;

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