The camp here has set up a sparse activities tent for the young, and on Monday, a stack of their pictures was on display.
The site currently has 70 listings and while the offerings are admittedly sparse, activities like Textile design in a sustainable village and a trek through Singalila in India are unique and inspirational enough to become the focal point of trips yet to be planned.
This separation of time scales results from the assumption of sparse activities.
More straightforwardly, a recent study has found that sparse activity in the excitatory neurons of layer 2/3 or layer 5 of the somatosensory cortex results in the recruitment of a recurrent inhibitory circuit consisting of inhibitory interneurons that are somatostatin positive.
Note the relatively sparse activity compared to YC2.60 recordings and large fluctuations in burst amplitudes.
Sparse activity of the KCs represents the identity of odors (Laurent and Naraghi, 1994; Perez-Orive et al., 2002; Turner et al., 2008).
In particular, the DG is postulated to function as a pattern separator by de-correlating inputs from EC (Marr, 1971) because of its sparse activity and its considerably larger population of neurons compared to the EC and CA3.
Our results suggest that the synaptic representation of locomotion, rather than being based on a sparse code (Marr, 1969; Attwell and Laughlin, 2001; Howarth et al., 2012), relies on a population of tuned neurons, which shift from sparse activity to a dense gait code during movement.
Thus, activity arriving to the hippocampus at different frequencies could be reflected by the activation of graded populations of neurons, immature GC that are reliable transmitters of the incoming frequency, and mature GC that are precise at informing the beginning of the stimulus, but with sparse activity.
Thus, hippocampal inputs activate two populations of neurons with variable frequency filters: immature cells, with wide‐range responses, that are reliable transmitters of the incoming frequency, and mature neurons, with narrow frequency response, that are precise at informing the beginning of the stimulus, but with a sparse activity.
Conversely, we suggest that vestibular activation might reduce the level of neuronal excitability in V5/MT by suppressing visually evoked activity that is incompatible with the vestibular cue, resulting in an overall more sparse V5/MT activity.
