New optic ataxia paper in Cortex

We’ve just published a new paper in Cortex. Working with Steve Jax at Moss Rehab and H. Branch Coslett at the University of Pennsylvania, we report an interesting case of an individual with a small tumor resection in right posterior intraparietal sulcus (pIPS). First, we found that her deficit occurred for either limb and was only seen for targets left of fixation, suggesting that pIPS encodes reach locations in an eye-centered reference frame. Second, contrasting previous accounts of optic ataxia, we found that she was better at immediate versus delayed reaching. Finally, although she has no damage to occipital cortex, we found a clear perceptual deficit, as she was poor at detecting changes in stimulus position left of fixation.