Encyclopedia of Pain

2007 Edition


Reference work entry
DOI: https://doi.org/10.1007/978-3-540-29805-2_195


A reduced or absent sense of pain response to stimulation that would normally be painful. Can be seen as a decrease in nociceptive threshold or a decrease in pain perception. It can also be described as a situation in which the intensity of the stimulus required to evoke an escape or avoidance response is increased above normal, or the time required for an animal to respond to a noxious stimulus is increased above normal. Analgesia is measured in the uninjured stated.

 Cancer Pain, Assessment in the Cognitively Impaired

 Cytokine Modulation of Opioid Action

 Descending Circuitry, Opioids

 Lateral Thalamic Lesions, Pain Behavior in Animals

 Postsynaptic Dorsal Column Projection, Anatomical Organization

Copyright information

© Springer-Verlag Berlin Heidelberg 2007