Table 1.

Spontaneous alternation ratio (R) measured in a Y maze.

Group	Oral Administration	I. C. V. Injection	Total Number of Arm Entries (N)	Number of Alternation (M)	R (%) 1
A1	Vehicle	Vehicle	26.0 ± 5.7	17.8 ± 4.0	75.1 ± 2.5
A2	Vehicle	Aβ25–35	32.0 ± 2.5	15.3 ± 1.5	51.0 ± 2.1 2
A3	Spirulina	Aβ25–35	30.5 ± 2.5	16.5 ± 2.0	57.2 ± 3.7
A4	ED Spirulina	Aβ25–35	31.0 ± 3.4	16.0 ± 2.5	53.9 ± 2.5
A5	EDPC	Aβ25–35	33.4 ± 5.7	19.2 ± 3.3	61.8 ± 3.7 3
A6	PC (120 mg/kg)	Aβ25–35	24.5 ± 3.2	13.0 ± 2.4	56.6 ± 4.5
A7	PC (750 mg/kg)	Aβ25–35	26.8 ± 3.9	12.7 ± 2.2	51.6 ± 3.8

¹ R (%) is given for each session as follows: Mx 100/(N-2). ² p < 0.01 vs. group A1 (sham). ³ p < 0.05 vs. group A2 (Aβ).