Abstract: This paper studied the memory retention of chicks which were trained to learn one trail passive avoidance task after 2 hours of left visual deprivation, and the improvement of bicuculline in memory formation of the unilateral visually deprived chicks. The main results were: 1 . Only short-term memory was maintained after 2 hours of unilateral visual deprivation. 2. The intermediate-term memory and longterm memory recovered after intracranial injection of bicucullion.

Key words: chick, left visual deprivation, bicuculline, memory