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更多的 (纠正性) 连续的冲刺,在损伤后面的额叶皮层的皮质

Sanne Böing¹, Jasper H Fabius², Marjoleine Hakkenberg¹

¹Experimental Psychology, Helmholtz Institute, Utrecht University, Utrecht, the Netherlands.

The European journal of neuroscience

|August 22, 2023

概括

患有后壁皮层 (PPC) 病变的患者表现出较慢的初级动,但仍然使用外回应纠正错误. 令人惊的是,他们启动了更多的校正冲刺,这表明了减少准确性的补偿策略.

科学领域:

神经科学是一个神经科学.
眼神运动控制器的控制器
神经心理学神经心理学

背景情况:

主要的萨卡德 (S1s) 经常跟随着使用视网膜和视网膜外反的纠正性萨卡德 (S2s).
人们曾经认为后壁皮层 (PPC) 病变会损害外皮膜信号处理,但最近的研究表明其作用有细微差别.
PPC病变可能不会取消外内处理,但可能会降低其可靠性,可能会影响纠正的萨卡德启动.

研究的目的:

为了调查PPC病变后外内信号的可靠性降低是否表现为降低或延迟的纠正萨卡德 (S2) 启动.
与对照组相比,分析PPC病变患者中S2s的数量和时间.
为了确定PPC病变是否会影响用于萨卡德错误校正的外视膜信息的使用.

主要方法:

7名患有PPC病变的患者和26名对照人进行了一项前代任务.
在S1开始后,目标仍然可见或被移除,从而隔离了S2s对外网膜信号的依赖.
使用线性混合效应建模和添加性危险分析分析了S2的数量和时间.

主要成果:

与对照组相比,PPC病变患者的S1执行速度较慢,S1幅度较低.
尽管S1不准确,但患者的S2补偿了下射,即使仅依赖于额外膜信息.
令人惊的是,与对照组相比,患者启动了更多的S2s.

结论:

PPC病变并不能取消用于萨卡德校正的外视膜信号的使用.
患有PPC病变的患者可以采用更多的校正 (S2s) 作为减少初级精度的补偿策略.
这种增加的S2活动,虽然看似不理想,但可能是一个适应机制来克服初级saccade的不准确性.

关键词:

添加剂危险分析添加剂危险分析额外收视膜外的信号眼球运动控制器二次的萨卡德斯二次的萨卡德斯

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