Figure 4From: Bilateral central pain sensitization in rats following a unilateral thalamic lesion may be treated with high doses of ketaminePercentage of Sprague Dawley rats reacting to acetone to determine cold hyperalgesia. Although no significant difference was seen when comparing results either prior or after surgery for either sham or collagenase groups, some animals within the collagenase groups clearly appear to be more sensitive to cold.Back to article page