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. 2009 Aug 26;4(8):e6780. doi: 10.1371/journal.pone.0006780

Figure 3. Pre-weaning enrichment improves swimming performance at P10.

Figure 3

(A, B) Representative examples of swimming behaviour of non-enriched (A) and enriched (B) mice at P10. In non-enriched mice (A), only the crown of the head and dorsal tip of the nose are above the water level (score of 2). In enriched (B) mice, the bulk of the head, including the entire ear and nose are above the water level (score of 4). The back and tail are also notably more elevated. (C) Drawings illustrating the relative position of the eyes, nose and ears used in the scoring assessment (based on the scheme of St Omer [47]). (D) Graph plotting swim scores for non-enriched (‘N’, n = 17) versus enriched (‘E’, n = 17) P10 mice. Scores were made by an observer blind to treatment group. Enriched mice scored significantly higher than non-enriched controls (Student's t-test, p<0.001). *: p<0.001.