Fig. 7.

Comparison of representative responses for sticker removal in each group of rats. A, CONrats use a bilateral approach to remove the sticker, with both forepaws gripping and pulling the sticker from the nose. Simultaneously, they maintain a stable base with both hindlimbs slightly externally rotated.B, C, Two different rats representing the typical response of the HX group. Each uses aberrant strategies when attempting to dislodge the sticker. To maintain balance, the right forelimb (arrows) moves forward and across midline while the left forelimb approaches the sticker. The photographs also depict the usual posture of the rats in the HX group (i.e., slightly contorted body position with the hindlimbs asymmetrically placed and the upper body frequently rotated in opposition to the lower body). D, E, Two representative HX + TPrats demonstrating the response consistently observed in this group. Similar to CON rats, the HX + TP rats use both forelimbs to reach for the sticker while maintaining a stable base of support.