Journal
SCIENCE
Volume 345, Issue 6196, Pages 535-542Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1253994
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Funding
- Banting postdoctoral fellowship
- NIH
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Several symptoms associated with chronic pain, including fatigue and depression, are characterized by reduced motivation to initiate or complete goal-directed tasks. However, it is unknown whether maladaptive modifications in neural circuits that regulate motivation occur during chronic pain. Here, we demonstrate that the decreased motivation elicited in mice by two different models of chronic pain requires a galanin receptor 1-triggered depression of excitatory synaptic transmission in indirect pathway nucleus accumbens medium spiny neurons. These results demonstrate a previously unknown pathological adaption in a key node of motivational neural circuitry that is required for one of the major sequela of chronic pain states and syndromes.
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