Navigation Links
Psilocybin inhibits the processing of negative emotions in the brain

Emotions like fear, anger, sadness, and joy enable people to adjust to their environment and react flexibly to stress and strain and are vital for cognitive processes, physiological reactions, and social behaviour. The processing of emotions is closely linked to structures in the brain, i.e. to what is known as the limbic system. Within this system the amygdala plays a central role above all it processes negative emotions like anxiety and fear. If the activity of the amygdala becomes unbalanced, depression and anxiety disorders may develop.

Researchers at the Psychiatric University Hospital of Zurich have now shown that psilocybin, the bioactive component in the Mexican magic mushroom, influences the amygdala, thereby weakening the processing of negative stimuli. These findings could "point the way to novel approaches to treatment" comments the lead author Rainer Krhenmann on the results which have now been published in the renowned medical journal "Biological Psychiatry".

Psilocybin inhibits the processing of negative emotions in the amygdala

The processing of emotions can be impaired by various causes and elicit mental disorders. Elevated activity of the amygdala in response to stimuli leads to the neurons strengthening negative signals and weakening the processing of positive ones. This mechanism plays an important role in the development of depression and anxiety disorders. Psilocybin intervenes specifically in this mechanism as shown by Dr. Rainer Krhenmann's research team of the Neuropsychopharmacology and Brain Imaging Unit led by Prof. Dr. Franz Vollenweider.

Psilocybin positively influences mood in healthy individuals. In the brain, this substance stimulates specific docking sites for the messenger serotonin. The scientists therefore assumed that psilocybin exerts its mood-brightening effect via a change in the serotonin system in the limbic brain regions. This could, in fact, be demonstrated using functional magnetic resonance imaging (fMRI). "Even a moderate dose of psilocybin weakens the processing of negative stimuli by modifying amygdala activity in the limbic system as well as in other associated brain regions", continues Krhenmann. The study clearly shows that the modulation of amygdalaactivity is directly linked to the experience of heightened mood.

Next study with depressive patients

According to Krhenmann, this observation is of major clinical importance. Depressive patients in particular react more to negative stimuli and their thoughts often revolve around negative contents. Hence, the neuropharmacologists now wish to elucidate in further studies whether psilocybin normalises the exaggerated processing of negative stimuli as seen in neuroimaging studies of depressedpatients - and may consequently lead to improved mood in these patients. .

Rainer Krhenmann considers research into novel approaches to treatment very important, because current available drugs for the treatment of depression and anxiety disorders are not effective in all patients and are often associated with unwanted side effects.


Contact: Franz Vollenweider
University of Zurich

Related medicine news :

1. Baicalin inhibits neurotoxicity of colistin sulfate effectively
2. Mayo Clinic finds experimental drug inhibits growth in all stages of common kidney cancer
3. TG02 Potently Inhibits the Proliferation and Survival of Multiple Myeloma Cell Lines through Depletion of the Key Survival Protein MCL-1
4. Kentucky team inhibits Alzheimers biomarkers in animal model by targeting astrocytes
5. New monoclonal antibody inhibits tumor growth in advanced solid tumors in phase I clinical trial
6. Molecule found that inhibits recovery from stroke
7. Bloodstream scavenger inhibits clotting without increased bleeding
8. Changes in processing, handling could reduce commercial fishing injuries
9. Complex Event Processing (CEP) Market (Fraud Detection, Sentiment Analysis, Transportation & Logistics) Worth $3,322 Million by 2018 – New Report by MarketsandMarkets
10. Sensory Processing Disorder Foundation to Participate in Colorado Gives Day
11. STAR Center and SPD Foundation Present Informal Webinar Sessions on Topics of Interest to Those Impacted by Sensory Processing Disorder
Post Your Comments:
(Date:6/27/2016)... ... 2016 , ... recently awarded their highest five-star rating to Best Buy ... in the United States and Canada wear eyeglasses. Once considered to be a purely ... make a fashion statement. Even celebrities use glasses as a way of creating an ...
(Date:6/26/2016)... Aliso Viejo, California (PRWEB) , ... June 26, 2016 , ... ... for Final Cut Pro X. , "Film editors can give their videos a whole ... artistically," said Christina Austin - CEO of Pixel Film Studios. , ProSlice Levels ...
(Date:6/26/2016)... ... June 26, 2016 , ... Many ... been diagnosed with endometriosis. These women need a treatment plan to not only ... approach that can help for preservation of fertility and ultimately achieving a pregnancy. ...
(Date:6/25/2016)... ... June 25, 2016 , ... The temporary closing of Bruton Memorial Library on June ... , brings up a new, often overlooked aspect of head lice: the parasite’s ability to ... is not a common occurrence, but a necessary one in the event that lice have ...
(Date:6/25/2016)... ... 25, 2016 , ... As a lifelong Southern Californian, Dr. Omkar Marathe earned ... the David Geffen School of Medicine at UCLA. He trained in Internal Medicine at ... fellowship in hematology/oncology at the UCLA-Olive View-Cedars Sinai program where he had the opportunity ...
Breaking Medicine News(10 mins):
(Date:6/23/2016)... , June 23, 2016 ... CAPR ), a biotechnology company focused on the ... announced that patient enrollment in its ongoing randomized ... has exceeded 50% of its 24-patient target. Capricor ... the third quarter of 2016, and to report ...
(Date:6/23/2016)... , June 23, 2016 , ... on Thursday, July 7, 2016 , , , , LOCATION: ... , , , , EXPERT PANELISTS:  , , , ... Senior Industry Analyst, Christi Bird; Senior Industry Analyst, Divyaa Ravishankar and ... The global pharmaceutical industry is witnessing an exceptional era. ...
(Date:6/23/2016)... Revolutionary technology includes multi-speaker listening ... industry leaders in advanced audiology and hearing aid technology, ... ™, the world,s first internet connected hearing aid that ...      (Photo: ) , ... ,world firsts,: , TwinLink™ - the first ...
Breaking Medicine Technology: