Effects of cold and mental stress on finger temperature in vasospastics and normal Ss

The present experiment studied the effects of mental and cold stress on finger temperature in 9 females suffering from peripheral vasospastic attacks (Raynaud's disease; RD group) and 9 female controls. Each S sat in a 0°C cold-storage room for 15 min, on 2 separate days. In one condition they were required to count backwards aloud under threat of electric shock to the hand. Finger temperature, pulse rate and subjective ratings of stress were recorded. A significant interaction with time and mental stress was observed only for the Control group with decreased finger temperature late in the session. Pulse rate was significantly elevated during the cold + mental-stress condition compared to the cold-only condition in the Control group, but not in the RD group. Subjective ratings of stress increased for both groups during the cold + mental-stress condition, with no significant difference between the groups.