The influences of DHA oil,walnut oil,safflower oil,perilla oil and linoleic acid on the spatial learning and memory of weaned rats and its relationship with the expression of ASICs ( acid sensing ion channels) gene were studied and discussed. A total of 48 weaned SD rats were divided randomly into 6 groups:negative control group ( basal feed ) , DHA oil group ( 0 . 902 mL/( kg · d ) ) , walnut oil group (2. 445 mL/(kg·d)),safflower oil group(1. 792 mL/(kg·d)),perilla oil group(2. 445 mL/(kg·d)) and linoleic acid group (1. 464 mL/(kg·d)). T...