Heart slowing down (VIDEO) University of California - San Diego This video is under embargo. Please login to access this video. Caption Researchers at UC San Diego and collaborating institutions have highlighted the immense crosstalk between the heart and the nervous system. The video displays heart activity dramatically slowing down with stimulation of vagal sensory neurons, which were found to trigger fainting. Credit Augustine Lab, UC San Diego Usage Restrictions Must be used in conjunction with UC San Diego study on sensory neurons tied to fainting. License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.