Columbia Scientists Identify Key Cells in Touch Sensation (video) Columbia University Medical Center Share Print E-Mail Loading video... Caption This video shows a Merkel cell responding to touch. Credit Lab of Ellen Lumpkin, Ph.D./ Columbia University Medical Center Usage Restrictions Use is limited to the context of this news. Share Print E-Mail 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.