We first examined whether reactivated patterns occur only in the presence of continued spatial input to the reactivated cells (i.e. during eSWRs).
Reactivation of waking patterns is suggested to be largely confined to SWR periods (Buzsaki, 1989) during which the synchronized firing of CA1 pyramidal cells facilitates the transfer of reactivated patterns to other cortical areas (Chrobak & Buzsaki, 1994).
Indeed, it has been shown that waking firing patterns of place cells recur during SWR patterns in subsequent sleep − here, reactivated patterns have been detected in the form of joint firing of place cells representing similar locations (Kudrimoti et al., 1999; O'Neill et al., 2006).
First, a small fraction (less than 20% expected for full reversion) of cop1-like E82 plants and L91 plants appeared in the F4 generation (not reflected in Fig. 5); and second, the GFP-COP1 expression of E82 gradually reverted back from the reactivated pattern to the silenced pattern especially in hemizygous families (Fig. 5C).
Before making decisions about which way to turn, for example, rats pause to retrace their steps by reactivating patterns of brain activity established in previous explorations.
However, according to the simulation theory, property-verification involves simulating a (partial and schematic) sensory-motor experience, by reactivating patterns laid down during earlier experiences.
In the abstract, every new generation is pretty much like the one that came before it: struggling Oedipally with its forebears, embracing the Zeitgeist, and otherwise reactivating stock patterns, meanwhile being fawned upon by marketers.
This dimensionality-reduction method has proven to be highly useful for intuitively visualizing the real-time transient dynamics and patterns associated with learning tasks [10] [12], [21], [22], that is, our method has allowed us to pin-point the moment at which the ensemble patterns were reactivated.
One possibility is that previously stored patterns are reactivated in a reverse-order during SWRs, triggered by place cells that fired just before SWR onset.
Place-selective activity is absent from SWRs occurring during longer periods of immobility (iSWRs), but waking activity patterns are reactivated during iSWRs (Zhang et al., 1998; Foster & Wilson, 2006; Jackson et al., 2006; O'Neill et al., 2006).
Cognitive Reactivity (CR) refers to the degree to which a mild dysphoric state reactivates negative thinking patterns, and it has been found to play a key causal role in depressive relapse.
