Table 1:

Patient demographic data and summary of neuropsychological findings

Patient	1	2	3	4	5	6	7	8	9	10
Age (yr) (sex)	52/M	42/M	39/M	45/M	54/M	45/M	69/M	55/M	39/M	59/F
Ruptured/unruptured	R	R	R	R	R	R	U	R	R	U
CT grade^{^a}	3	4	3	3	4	3	NA	4	4	NA
Treatment	Trap	Clip	Clip 2nd	Clip	Clip	Clip	Clip	Clip	Clip	Clip
Months from treatment^{^b}	2	4	4^{^b}	3	13	3	3	5	3	4
MMSE^{^c}	24	25	26	28	25	28	26	24	23	27
IQ^{^d}	82	97	111	110	120	106	102	83	89	92
MQ^{^e}	58	59	68	92	92	87	86	64	68	67
IQ minus MQ	24	38	43	18	28	19	16	19	21	25
Attention/concentration	81	80	114	138	131	115	115	91	94	133
Delayed recall	<50	<50	<50	<50	64	73	62	<50	<50	<50

Note:—R indicates ruptured; U, unruptured; MMSE, Mini-Mental State Examination; IVH, intraventricular hemorrhage in the bilateral lateral ventricles; Trap, trapping; Clip, clipping; NA, not applied; WAIS-III, Wechsler Adult Intelligence Scale III; WMS-R, Wechsler Memory Scale-Revised.
↵a CT grade, proposed by Claassen et al,³⁹ classifies the severity of aneurysmal subarachnoid hemorrhage on CT scans at onset into 5 grades from 0 to 4, according to the appearance of both of SAH and intraventricular hemorrhage in the bilateral lateral ventricles: grade 0, no SAH or IVH; grade 1, minimal SAH, no IVH; grade 2, minimal SAH, with IVH; grade 3, thick SAH, no IVH; grade 4, thick SAH, with IVH. In this scaling, the definition of “thick” is “completely filling” ≥1 cistern or fissure. In 2 patients with unruptured aneurysm (patients 7 and 10), grading was not applied.
↵b Months after second clipping.
↵c MMSE, used to assess cognitive impairment (full score 30).⁴⁰
↵d IQ evaluated by the Wechsler Adult Intelligence Scale III.¹⁸
↵e MQ, general memory quotient, attention/concentration quotient, and delayed recall quotient, evaluated by Wechsler Memory Scale-Revised.¹⁹ Each quotient has a mean of 100 in the normal population and an SD of 15. A substantial difference between IQ (by the WAIS-III) and MQ (by the WMS-R) scores indicates that the person with amnesia has a particular impairment in memory—but not in the “intelligence” per se.²⁰