Table 3

Performance on selected neuropsychological tests in the Alzheimer’s disease and posterior cortical atrophy groups

tADPCAControls (n = 31; age 68.5 (7.2) years)
Values are mean (SD).
Control scores were obtained from the control panel of the Cognition and Brain Sciences Unit, Cambridge.
*p<0.05, †p<0.005 v tAD.
FAS, ; NT, not tested; PCA, posterior cortical atrophy; tAD, typical Alzheimer’s disease.
Attention
• Forward digit span6.7 (1.0)5.7 (1.0)7.1 (0.9)
• Backward digit span4.3 (1.7)3.0 (0.9)5.4 (1.4)
Memory
• Logical memory0.1 (0.3)1.9 (2.3)7.8 (3.8)
Language and semantics
• Category fluency (animals, birds, fruit, dog breeds)37.3 (12.7)41.7 (24.2)60.3 (12.6)
• Pyramids and palm-trees (word version, /52)50.1 (1.9)48.3 (4.3)51.1 (1.1)
• 64 item picture naming ( /64)59.8 (4.1)56.0 (4.3)63.8 (0.4)
Visuospatial
• Rey figure copy ( /36)31.7 (3.8)1.2 (2.0)†34.2 (1.6)
Visual object and space perception battery (VOSP)
• Dot counting ( /10)9.6 (0.5)4.3 (2.4)†9.9 (0.3)
• Position discrimination ( /20)NT11.3 (3.9)19.8 (0.6)
• Cube analysis ( /10)8.1 (1.6)2.0 (3.1)*9.3 (1.5)
• Incomplete letters ( /20)18.6 (1.1)9.8 (6.9)*19.2 (0.8)
• Object decision ( /20)17.3 (2.3)12.7 (5.1)16.9 (0.8)
Executive
• Letter fluency (FAS)38.4 (14.9)32.8 (20.5)41.1 (11.6)