Table 2. The ratios of NAA/Cr, Cho/Cr, Glx/Cr and Ins/Cr in the visual cortex.

	Group A			Group B
	Monkey 1	Monkey 2	Mean	Monkey 3	Monkey 4	Mean
NAA/Cr	1.06	1.01	1.04	0.85↓↓	0.58 ↓↓↓	0.72↓↓
Ins/Cr	1.69	1.51	1.60	1.09↓↓	1.70 ↑	1.40 ↓
Cho/Cr	0.28	0.26	0.27	0.36 ↑↑↑	0.50 ↑↑↑	0.43 ↑↑↑
Glx/Cr	1.56	1.29	1.43	1.32 ↓	1.39 ↓	1.36 ↓

Note: Group A: normal control macaques, Group B: binocular blind macaques; ↑/↓ increased/decreased 5%-15%; ↑↑/↓↓ increased/decreased 16%-29%; ↑↑↑/↓↓↓ increased/decreased more than 30%.