Table 2

Preoperative and postoperative neuropsychological findings

Cognitive function	HE pre	HE post 1	HE post 2	WA pre	WA post 1	WA post 2	SB pre	SB post 1	SB post 2	NE pre	NE post 1	MM pre	MM post 1	MM post 2	GR pre	GR post 1	GR post 2	Maximum possible score
1 SD below group mean (normal subjects), or below 16th centile, or below T value 40.  *2 SD below group mean (normal subjects), or below 3rd centile, or below T value 31.  NA, not administered; post 1, first postoperative examination; post 2, second postoperative examination; pre, preoperative examination.
Time postoperative (weeks)	−1	+1	+100	−1	+22	+60	−1	+1	+72	−1	+1	−1	+4	+122	−1	+16	+52
MMSE orientation	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10
Digit span forward	NA	NA	7	5	5	6	NA	NA	5	NA	NA	6	8	7	4	5	5
Digit span backward	NA	NA	5	4	3	4	NA	NA	5	NA	NA	3	6	4	3	3	3
Münchner Gedächtnistest
Encoding trial 1	6	5	8	5	3*	7	6	6	9	9	4*	4*	5	7	2**	3*	5	16
Encoding trial 2	11	9	12	8	9	9	7*	10	12	10	7*	9	12	11	3**	4**	7*	16
Encoding trial 3	11	11	13	10	10	10	9*	9*	14	10	11	8*	14	13	5**	9*	8*	16
Encoding trial 4	7**	11	14	9*	14	14	10*	10*	11	13	11	9*	13	11	3**	10*	10*	16
Encoding trial 5	10*	12	13	9*	15	15	11	13	13	12	13	12	13	15	5**	13	11	16
Short delay free recall	11	10	10	5**	13	10	5**	9*	12	15	14	5**	12	13	1**	8**	6**	16
Short delay cued recall	8*	8*	12	9*	14	12	7**	11	10	15	15	7**	12	16	4**	8*	8*	16
Long delay free recall	8*	10	11	6**	14	12	9*	9*	11	16	13	13	12	15	2**	9*	6**	16
Long delay cued recall	8*	8*	11	8*	15	10	9*	9*	12	16	13	7**	13	15	6**	10	9*	16
Recognition correct	16	16	16	15	16	13*	16	16	15	16	16	15	15	16	12*	16	14*	16
False positive	1*	0	0	0	0	1*	0	0	1*	0	0	7**	0	0	1*	2**	3**	16
Confabulations	0	0	0	0	1	2**	2**	2**	0	0	0	3**	2**	0	6**	2**	2**
Intrusions	0	0	0	0	0	0	0	0	0	0	1	0	0	0	0	0	0
Perseverations	9**	7**	5**	0	1	1	6**	3**	15**	0	0	3**	1	0	3**	3**	3**
Rey Osterrieth C figure
Copy	35	35	36	35	34	34	36	35	36	21**	33*	30	31	34	36	36	35	36
Short delay free recall	24	25	33	13.5**	26	23	14**	22.5	23	13.5**	22	6**	8**	14.5	16.5	16	22.5	36
Long delay free recall	20	26	33	12**	27	20	21	22.5	23	13.5**	21	6**	8**	15	17.5	16	19.5	36
Category word fluency	28	37	25	12*	20	25	19*	21	25	28	NA	13*	24	35	11*	21	18
Trail making test A (s)	25	31	27	34	20	20	49*	40	36	27	26	105**	35	33	70**	42	64*
Trail making test B (s)	72	48	55	68	50	57	116*	102	75	59	46	314**	82	116	300**	147*	212**
Stroop test
Reading of colour words (s)	25	22	23	26	27	26	40*	32	35	28	NA	NA	56*	37	29	44	40
Naming of colours (s)	39	36	36	42	39	31	58	52	42	45	NA	NA	55	55	42	52	50
Interference (s)	56	54	54	60	58	53	90	78	75	82	NA	NA	94	100	77	82	76