[Spinal control of afferent temperature information in the cat].

The picrotoxin effect on background and evoked discharges of interneurons in the superficial laminae of cat dorsal horn was investigated under mechanical and temperature influences on skin receptors. It was shown that information about skin temperature is modulated on the presynaptic level. It is concluded that competitive interaction between fibres of large and small diameters is of certain importance in the transmission of such information.