Improvement of memory guided saccades in parkinsonian patients by high frequency subthalamic nucleus stimulation.
Recent studies in the monkey suggest that the subthalamic nucleus (STN) is involved in control of eye movement, yet its functional significance in humans is unknown. Saccadic eye movements were studied in eight parkinsonian patients treated by bilateral electrical stimulation of the STN. STN stimulation improved the accuracy of memory guided saccades but not of reflexive visually guided saccades and had no effect on the antisaccade task. This study shows that, by contrast with levodopa, STN stimulation improves memory guided saccade deficits, and illustrates for the first time in humans the role of the STN in the control of purposive saccades.
Rivaud-Péchoux
S
S
INSERM U289, Hôpital de la Salpêtrière, 47 bd de l'Hôpital, 75651 Paris Cedex 13, France. rivaud@ccr.jussieu.fr
Vermersch
A I
AI
Gaymard
B
B
Ploner
C J
CJ
Bejjani
B P
BP
Damier
P
P
Demeret
S
S
Agid
Y
Y
Pierrot-Deseilligny
C
C
D004599:Electric Stimulation Therapy; D006801:Humans; D007980:Levodopa / Q000627:therapeutic use; D008568:Memory / Q000502:physiology*; D008875:Middle Aged; D010300:Parkinson Disease / Q000503:physiopathology / Q000628:therapy*; D011930:Reaction Time / Q000502:physiology; D012438:Saccades / Q000502:physiology*; D020531:Subthalamic Nucleus / Q000503:physiopathology*
D007980:Levodopa