Brain activation during spatial updating and attentive tracking of moving targets

作者：Jahn Georg^*; Wendt Julia; Lotze Martin; Papenmeier Frank; Huff Markus

来源：Brain and Cognition, 2012, 78(2): 105-113.

DOI：10.1016/j.bandc.2011.12.001

• Spatial updating
• Spatial working memory
• Visual attention
• Multiple object tracking
• Parietal cortex
• Functional MRI

Keeping aware of the locations of objects while one is moving requires the updating of spatial representations. As long as the objects are visible, attentional tracking is sufficient, but knowing where objects out of view went in relation to one%26apos;s own body involves an updating of spatial working memory. Here, multiple object tracking was employed to study spatial updating and its neural correlates. In a dynamic 3D-scene, targets moved among visually indistinguishable distractors. The targets and distractors either stayed visible during continuous viewpoint changes or they turned invisible. The parametric variation of tracking load revealed load-dependent activations of the intraparietal sulcus, the superior parietal lobule, and the lateral occipital cortex in response to the attentive tracking task. Viewpoint changes with invisible objects that demanded retention and updating produced load-dependent activation only in the precuneus in line with its presumed involvement in updating spatial working memory.

• 出版日期2012-3