Figure 1. Mean limb surface temperature (MLST) (°C) as a result of treatment. No significant (P . 0.05) differences were revealed between perineural anesthetic and perineural phosphate buffered saline (PBS) injections at the abaxial sesamoid sites of the forelimbs in clinically normal horses. LA = left forelimb with anesthetic injection, RA = right forelimb with anesthetic injection, LS = left forelimb with PBS injection, RS = right forelimb with PBS injection. Error bars indicate 95% confidence intervals.