4.5 Article

Is This Within Reach? Left but Not Right Brain Damage Affects Affordance Judgment Tendencies

期刊

FRONTIERS IN HUMAN NEUROSCIENCE
卷 14, 期 -, 页码 -

出版社

FRONTIERS MEDIA SA
DOI: 10.3389/fnhum.2020.531893

关键词

stroke; perception action; affordances; lesion analysis; reachability; decision making

资金

  1. James S McDonnell Foundation [220020190]
  2. EU [291784]
  3. Deutsche Forschungsgemeinschaft (DFG) [438470816]
  4. Landesgraduiertenfoerderungsgesetz (LGFG) stipend of the University of Konstanz

向作者/读者索取更多资源

This study investigated the impact of left or right hemisphere injuries on judgments of reachability in stroke patients. While there were no significant differences in perceptual sensitivity and accuracy between groups, left brain damaged patients showed no clear judgment tendency, possibly related to damage in specific brain regions.
The ability to judge accurately whether or not an action can be accomplished successfully is critical for selecting appropriate response options that enable adaptive behaviors. Such affordance judgments are thought to rely on the perceived fit between environmental properties and knowledge of one's current physical capabilities. Little, however, is currently known about the ability of individuals to judge their own affordances following a stroke, or about the underlying neural mechanisms involved. To address these issues, we employed a signal detection approach to investigate the impact of left or right hemisphere injuries on judgments of whether a visual object was located within reach while remaining still (i.e., reachability). Regarding perceptual sensitivity and accuracy in judging reachability, there were no significant group differences between healthy controls (N = 29), right brain damaged (RBD, N = 17) and left brain damaged stroke patients (LBD, N = 17). However, while healthy controls and RBD patients demonstrated a negative response criterion and thus overestimated their reach capability, LBD patients' average response criterion converged to zero, indicating no judgment tendency. Critically, the LBD group's judgment tendency pattern is consistent with previous findings in this same sample on an affordance judgment task that required estimating whether the hand can fit through apertures (Randerath et al., 2018). Lesion analysis suggests that this loss of judgment tendency may be associated with damage to the left insula, the left parietal and middle temporal lobe. Based on these results, we propose that damage to the left ventro-dorsal stream disrupts the retrieval and processing of a stable criterion, leading to stronger reliance on intact on-line body-perceptive processes computed within the preserved bilateral dorsal network.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.5
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据