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19,20) Additional features that may be helpful in differential diagnosis include fixation, which is abnormal in a significant proportion of PSP and MSA cases but less so in PD, (5) eyelid mobility which is abnormal in PSP but more likely to be normal in PD and MSA, (4) and the slowing of saccadic movements especially in the vertical direction which occurs most significantly in PSP.
The idea that you're able to decrease symptoms or cure PTSD by repetitive saccadic movements while recalling the trauma just sounds cuckoo," he said.
While such "aeration" does not consistently produce sense units, the combination of regularized spacing with signa nevertheless aids saccadic movements of the eye, potentially increasing the speed of comprehension.