Differences in thermal responses of cat trigeminal ganglion 'cold' receptors under urethane and pentobarbital anesthetization.

Cutaneous thermoreceptors recorded from the trigeminal ganglion of cats anesthetized with urethane showed a significant reduction in thermal sensitivity when compared with neuronal responses obtained from sodium pentobarbital-anesthetized cats. The results of this study indicate that a detailed analysis of primary afferent thermoreceptor response characteristics should consider the anesthesia employed.