We propose that these connections are responsible for the spatial-phase invariance of complex-cell responses. In a network model with selective cortical amplification, neurons exhibit simple-cell ...

What tools and materials do they need? And what are the key characteristics that define a cell? This unit answers these questions and provides a basic overview of the inner workings of the cell.

I engineered HeLa cells to produce copious amounts of these fusion proteins, and watched where they went. Most migrated to the nucleolus, as expected, but one protein steadfastly refused. Instead, it ...