News Releases

With the discovery that the unconscious mind plays a key role in the placebo effect, researchers have identified a novel mechanism that helps explain the power of placebos and nocebos.

Study Shows That Placebo Response Occurs at Nonconscious Level

New findings demonstrate an important role for the unconscious mind in pain perception

10/Sep/2012

With the discovery that the unconscious mind plays a key role in the placebo effect, researchers have identified a novel mechanism that helps explain the power of placebos and nocebos.

Described in the September 10 on-line issue of the Proceedings of the National Academy of Sciences (PNAS), the new findings demonstrate that the placebo effect can be activated outside of conscious awareness, and provide an explanation for how patients can show clinical improvement even when they receive treatments devoid of active ingredients or of known therapeutic efficacy.

Link to full Beth Israel/Deaconess release on study led by BI Deaconess/MGH investigator Karin Jensen.

patient

U.S. News and World Report Best Hospitals 2014-2015

U.S. News & World Report ranks Mass General #1 in New England and #2 in the nation based on our quality of care, patient safety and reputation in 16 clinical specialties.

Search the Mass General news archive

Search the archive for previously published news articles, press releases and publications.

View all departments

Departments and Centers at Mass General have a reputation for excellence in patient care. View a list of all departments.