Columns of Cortex (IMAGE) Picower Institute at MIT Caption A distinct thicket of vessels and myelin fibers are evident in each of six color coded visual processing regions in the cortex of a mouse. The columns are formed by stacking images taken at 5-micron increments through a millimeter of depth in each of the regions. Credit Sur Lab/MIT Picower Institute Usage Restrictions with credit License Licensed 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.