Attentional influences on noxious and innocuous cutaneous heat detection in humans and monkeys

摘要: This study examines whether selective attention can influence sensory-discriminative aspects of nociception in humans and monkeys trained to detect innocuous noxious thermal stimuli. Human subjects had two contact thermodes positioned bilaterally above the upper lip. Upon trial initiation both heated either 39 degrees C, an warm temperature, or 45 a slightly temperature. After 4 9 sec, temperature one thermode increased additional step less than 1 degree C. Subjects released button when they detected this second increase (T2). Three types trials were presented order assess effects spatially on detection. On 40% light correctly signaled location which T2 would occur. 10% incorrectly T2. No signal was remaining trials. From C base line, detection latencies shortest correct condition, longest incorrect intermediate unsignaled condition. The percent undetected T2s greatest condition least latency greater but latter not different from latency. In addition, same all three trials.(ABSTRACT TRUNCATED AT 250 WORDS)