Effects of ω-3 supplementation on learning. A and B: Restraint stress decreased the percentage of conditioned responses but ω-3 prevented this effect. The values are the means ± SEM of 9 animals per group. Each point represents the percentages of conditioned avoidance responses (% CR) for the three stages of the test (habituation, conditioning one and two). C, D: Effect of ω-3 supplementation on learning during days 1 and 2 of conditioning, vehicle supplementation decreased learning, while ω-3 supplementation prevented this effect. E: Comparing the slopes of conditioned responses of rats subjected to restraint stress on day 2 of conditioning. The supplemented rats subjected tostress showed significant differences from the stressed rats in both the control and vehicle groups. ω-3: ω-3 supplementation. Data are represented as means ± SEM. An asterisk (*) indicates significant differences.