Table 4.

Effect of Z. jujuba extract on the density of CA1 and CA3 neurons in the hippocampus.

	DW + DW	SCO + DW	SCO + DZ	SCO + TA	SCO + E29	SCO + E57	SCO + 114
CA1	110.1 ± 3.1	61.1 ± 1.7c	88.6 ± 2.3∗∗∗	74.1 ± 1.1∗	91.7 ± 1.2∗∗∗	85.3 ± 3.7∗∗∗	78.5 ± 1.5∗∗
CA3	46.3 ± 1.5	37.5 ± 1.5a	44.1 ± 2.4∗	41.5 ± 1.5	45.5 ± 1.5∗	45.1 ± 1.1∗	40.5 ± 0.5

Each value represents the average ± SEM; n = 7. ^ap < 0.05; ^cp < 0.001vs. normal control. ^∗p < 0.05; ^∗∗p < 0.01; ^∗∗∗p < 0.001vs. negative control; DW: distilled water (10 ml/kg); SCO: scopolamine (1 mg/kg); DZ: donepezil (1.2 mg/kg); TA: tacrine (10 mg/kg); E29, E57, and E114: aqueous extract of Z. jujuba at respective doses of 29, 57, and 114 mg/kg. DW + DW: normal control group; SCO + DW: negative control group; SCO + DZ: positive control group with donepezil; SCO + TA: positive control group with tacrine; SCO + E29-E114: test groups treated with the extract of Z. jujuba; CA1 : Cornus ammonis 1; CA3 : Cornus ammonis 3.