Table 3.

Psychomotor speed, cognitive flexibility, verbal and spatial working memory with the stimulator turned “off” and “on”

TestSTN2p Value*GPi2p Value
“off”“on”“off”“on”
Values are mean (SD). Boldface indicates statistical significance.
Two groups are described; one with stimulation of the subthalamic nucleus (STN2), one with stimulation of the internal globus pallidus (GPi2). The effect of stimulation was significant for the STN group alone (*p).
Motor screening
Latency1277.9 (467.1)1045.8 (195.2)0.05872.6 (116.7)814.2 (143.6)0.14
Precision20.7 (4.0)21.4 (4.2)0.5752.6 (79.6)25.2 (20.7)0.46
Big Little Circle
Latency951.9 (398.4)729.4 (117.1)0.02642.8 (112.8)648.8 (89.7)0.68
Set shifting
Stage8.1 (2.0)8.0 (2.2)0.598.0 (2.2)8.2 (1.8)0.37
Errors38.3 (40.3)40.0 (40.1)0.6239.0 (63.0)43.8 (51.3)0.50
Verbal working memory
Errors19.1 (8.4)17.3 (8.7)0.0917.8 (10.3)13.6 (6.3)0.20
Spatial working memory
Strategy36.6 (5.4)36.5 (5.1)0.8836.4 (4.7)38.0 (2.4)0.27
Errors46.9 (15.9)40.3 (19.0)0.0229.6 (21.7)31.0 (22.2)0.89
6 boxes12.7 (11.2)11.9 (10.6)0.819.0 (6.0)6.4 (6.3)0.34
8 boxes32.9 (8.8)26.3 (9.6)0.00519.8 (17.2)23.6 (14.7)0.59