Vector-Assisted Spectral Tracing (VAST) in Mitral Cells of the Olfactory Bulb (video) California Institute of Technology Share Print E-Mail Loading video... Caption A movie highlighting the vector-assisted spectral tracing (VAST) system. Mitral cells in the olfactory bulb of an adult mouse are labeled with multiple colors to facilitate morphology tracing. Credit Chan et al., Gradinaru Lab Usage Restrictions WITH CREDITS 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.