The Neural Correlates of Spatial and Object Working Memory in Elderly and Parkinson’s Disease Subjects

Table 1

Clinical and demographic data of IPD patients and healthy volunteers (ESs) (mean ± SD).

	IPD (mean ± SD)	ESs (mean ± SD)	Statistics
Age	63.3 ± 6.3	59.0 ± 2.3	Ns
Education	13.4 ± 4.4	13.9 ± 7.2	Ns
Disease duration	5 ± 3.4		—
MMSE	29.27 ± 0.65	28.91 ± 1.04	Ns
DIGIT SPAN forward	6.55 ± 0.82	6.82 ± 0.75	Ns
Digit span backward	4.36 ± 0.81	5.09 ± 1.38	Ns
Corsi blocks	4.91 ± 0.94	5. 18 ± 1.8	Ns
Letter fluency	28.64 ± 8.19	37.64 ± 7.03	Ns
Trail making A (sec.)	49.36 ± 22.09	32.64 ± 6.67	Ns
Trail making B (sec.)	101. 82 ± 43.77	67.00 ± 17.79	Ns
Visuospatial supraspan	12.55 ± 4.27	10.27 ± 3.72	Ns
GDS	3.82 ± 2.52	2.82 ± 2.52	Ns

No statistical differences at .