Alterations of Eye Movement Control in Neurodegenerative Movement Disorders

Figure 2

Visually guided horizontal reflexive saccade in a Parkinson’s disease patient with mild cognitive impairment (PD-MCI) and a Parkinson’s disease patient without cognitive impairment (PD), compared with an age-matched healthy control subject. Both PD patients presented with a considerable multistep sequence (saccadic hypometria) to shift their gaze onto the target (dashed-line). The videooculographically recorded data display the orthogonalized position for the cyclopean eye shown for the horizontal component (black lines). 𝑥-axis: acquisition time in seconds; 𝑦-axis: horizontal eye position in degrees.