Trans-saccadic memory after right parietal brain damage

Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
A F Ten BrinkStefan Van der Stigchel

Abstract

Spatial remapping, the process of updating information across eye movements, is an important mechanism for trans-saccadic perception. The right posterior parietal cortex (PPC) is a region that has been associated most strongly with spatial remapping. The aim of the project was to investigate the effect of damage to the right PPC on direction specific trans-saccadic memory. We compared trans-saccadic memory performance for central items that had to be remembered while making a left- versus rightward eye movement, or for items that were remapped within the left versus right visual field. We included 9 stroke patients with unilateral right PPC lesions and 31 healthy control subjects. Participants memorized the location of a briefly presented item, had to make one saccade (either towards the left or right, or upward or downward), and subsequently had to decide in what direction the probe had shifted. We used a staircase to adjust task difficulty (i.e., the distance between the memory item and probe). Bayesian repeated measures ANOVAs were used to compare left versus right eye movements and items in the left versus right visual field. In both conditions, patients with right PPC damage showed worse trans-saccadic memory performance c...Continue Reading

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Citations

Apr 17, 2021·Cortex; a Journal Devoted to the Study of the Nervous System and Behavior·Alexis ChevietDenis Pélisson
Apr 23, 2021·Scientific Reports·Bianca R BaltaretuJ Douglas Crawford

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