Clinical trial NCT01409538: Brain Imaging and Pain: Analysis of Placebo Analgesia
Official title: Brain Imaging and Pain: Analysis of Placebo Analgesia
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: PHASE1
Conditions: Brain Imaging of Placebo Analgesia
Lead sponsor: University of Florida
Sponsor class: OTHER
First posted: 2011-08-04
Enrollment: 140
Sex: ALL
Minimum age (years): 18
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: yes
Allocation: RANDOMIZED
Intervention model: PARALLEL
Primary purpose: BASIC_SCIENCE

Brief summary: This study examines the brain activation associated with placebo pain reduction.

Detailed description: This study is a basic science study of the mechanisms of placebo analgesia in asymptomatic healthy individuals. Each participant receives a baseline pain testing session, followed by a conditioning paradigm that results in expectation of pain relief and conditioning. They then undergo functional magnetic resonance imaging during either placebo (conditioned analgesia) or baseline. To examine order effects and habituation, the participants also either undergo a repeated placebo or a repeated baseline. The primary dependent measures in the study are the fMRI determined regions of interest, in a network of brain areas associated with pain processing. The anticipated outcome of the study is the alteration of network connectivity between sensory, affective, evaluative areas of the brain associated with placebo.

Because this is not a traditional clinical trial, there are not traditional efficacy criteria, rather the outcomes are changes in brain function from manipulations of patient expectation and classical conditioning.

Eligibility criteria: Inclusion Criteria:

* at least 18 years of age
* english speaking

Exclusion Criteria:

* pain condition
* pregnant

Primary outcomes:
measure: Brain Imaging Results
timeFrame: 2 weeks from baseline
Secondary outcomes:
Other outcomes:
Locations:
city: Gainesville
country: United States
facility: University of Florida
state: Florida
Study officials:
affiliation: University of Florida
name: Michael E Robinson, Ph.D.
role: PRINCIPAL_INVESTIGATOR
References:
citation: Sevel LS, O'Shea AM, Letzen JE, Craggs JG, Price DD, Robinson ME. Effective connectivity predicts future placebo analgesic response: A dynamic causal modeling study of pain processing in healthy controls. Neuroimage. 2015 Apr 15;110:87-94. doi: 10.1016/j.neuroimage.2015.01.056. Epub 2015 Feb 3.
citation: Robinson ME, Staud R, Price DD. Pain measurement and brain activity: will neuroimages replace pain ratings? J Pain. 2013 Apr;14(4):323-7. doi: 10.1016/j.jpain.2012.05.007.
citation: Letzen JE, Sevel LS, Gay CW, O'Shea AM, Craggs JG, Price DD, Robinson ME. Test-retest reliability of pain-related brain activity in healthy controls undergoing experimental thermal pain. J Pain. 2014 Oct;15(10):1008-14. doi: 10.1016/j.jpain.2014.06.011. Epub 2014 Jul 3.
citation: Letzen JE, Craggs JG, Perlstein WM, Price DD, Robinson ME. Functional connectivity of the default mode network and its association with pain networks in irritable bowel patients assessed via lidocaine treatment. J Pain. 2013 Oct;14(10):1077-87. doi: 10.1016/j.jpain.2013.04.003. Epub 2013 Jun 3.
citation: Kisaalita NR, Robinson ME. Analgesic placebo treatment perceptions: acceptability, efficacy, and knowledge. J Pain. 2012 Sep;13(9):891-900. doi: 10.1016/j.jpain.2012.06.003. Epub 2012 Jul 31.
citation: Kisaalita N, Staud R, Hurley R, Robinson M. Placebo use in pain management: The role of medical context, treatment efficacy, and deception in determining placebo acceptability. Pain. 2014 Dec;155(12):2638-2645. doi: 10.1016/j.pain.2014.09.029. Epub 2014 Sep 28.
citation: Craggs JG, Price DD, Robinson ME. Enhancing the placebo response: functional magnetic resonance imaging evidence of memory and semantic processing in placebo analgesia. J Pain. 2014 Apr;15(4):435-46. doi: 10.1016/j.jpain.2013.12.009. Epub 2014 Jan 9.