What are MHC class I proteins (here in green), which are famous for their role in the immune system, doing in newly-born neurons (purple) in the prenatal brain, well before the maturation of the immune response? Hints at as-yet-unknown functions for these immune proteins in the earliest stages of brain development.
Archive – March 2013
Our experience of the world seems to divide naturally into discrete, temporally extended events, yet the mechanisms underlying the learning and identification of events are poorly understood. Research on event perception has focused on transient elevations in predictive uncertainty or surprise as the primary signal driving event segmentation.
The study, published in the journal Nature, indicates that certain position-tracking neurons — called grid cells — ramp their activity up and down by working together in a collective way to determine location, rather than each cell acting on its own as was proposed by a competing theory.