Table 2.

Patient Characteristics and Lateralization of Seizure Focus

			MR Spectroscopic Imaging
			Left vs Right Hemisphere		Patient vs Control Subject*
Patient No./Age (y)/Sex	Histopathologic Diagnosis	EEG	NAA/(Creating and Choline)	NAA Concentration	NAA/(Creating and Choline)	NAA Concentration	Engel Classification at Surgery
Patients with hippocampal atrophy
1/38/M	MTS	R	R	R	N	N	I
3/24/F	MTS	L	L	L	L	N	I
6/35/F	N/A	L	L	L	B:L	B:L	N/A
7/33 F	MTS	L	L	L	B:L	L	III
8/49/F	MTS	L	L	L	L	L	I
10/28/M	MTS	R	R	R	B:R	B:R	I
14,21/M	N/A	R	R	R	R	R	N/A
15/26/M	N	R	R	R	B:R	B:R	I
16/43/F	N/A	R	R	R	N	N	N/A
Patients without hippocampal atrophy
2/49/F	MTS	L	L	R	N	R	III
4/43/M	MTS	L	L	R	L	N	II
5/28/M	N	L	L	L	L	B:L	IV
9/36/M	N/A	L	L	L	B:L	L	N/A
11/41/F	N/A	L	L	R	B:L	B:R	N/A
12/28/M	MTS	R	R	R	R	R	I
13/44/M	MTS	R	R	R	R	R	I

Note.—B = bilateral. B:L = bilateral with dominant left hemispheric lesions, B:R = bilateral with dominant right hemispheric lesions, L. = left, MTS = mesial temporal sclerosis, N = normal, N/A = not applicable, NAA = N-acetylasprtate, R = right.

^*Determination of hemisphere on the basis of patient data at least 2 standard deviations below the control subject data.