Deep Brain Stimulation Frequency of the Subthalamic Nucleus Affects Phonemic and Action Fluency in Parkinson’s Disease

Table 5

Distribution of delta values for phonemic and action fluency tasks.

	Phonemic VF	Phonemic VF	Action VF
	P version	FAS version
Delta value, mean SD	4.05 (5.50)	3.05 (6.73)	2.40 (3.60)
Delta classification, (%)
Improvement at 60 Hz	14 (70)	11 (55)	10 (50)
Worsening at 60 Hz	2 (10)	3 (15)	3 (15)
No difference	2 (10)	4 (20)	3 (15)

SD: standard deviation; VF: verbal fluency.