Bilateral subthalamic or pallidal stimulation for Parkinson's disease affects neither memory nor executive functions. A consecutive series of 62 patients. - Ardouin,P.; Pillon,B.; Peiffer,E.; Bejjani,P.; Limousin,P.; Damier,P.; Arnulf,I.; Benabid,A.; Agid,Y.; Pollak,P. (Ann Neurol, 1999)