To see whether roosters simply
crow in response to external stimuli or according to a circadian rhythm — an internally driven, cyclical pattern of behavior that occurs over a 24 - hour period — the team put one group of birds into a room with continuously dim lights and tracked the birds» crowing over the course of a month.
With it, they want to determine the firing patterns of specific neuron
groupings in response to external stimuli which, in turn, will be used to «elicit sensory percepts in the visual or somatosensory cortices.»
This is of interest because a cell's genetic material is housed in the nucleus, and this is the location where different genes get turned on and off
in response to external stimuli, such as the presence of lipids from fatty foods.