These findings support the view that (multi sensory and motor representations overlap in PPS and suggests that spatial representations are strongly bound up with temporal representations.
Our representational analysis allowed us for the first time to distinguish between integrated vs independent representations, even if the independent spatial and temporal representations overlapped spatially.
DOI: http://dx.doi.org/10.7554/eLife.03043.016 Although temporal and spatial features were represented independently in premotor and parietal cortex (i.e., these regions showed specific activity patterns for one feature, independent of the respective other feature), spatially these representations overlapped to a certain degree, especially in caudal PMd.
The hippocampal formation is suggested to be crucial in unambiguous representation of overlapping temporal sequences in episodic memory.
To properly model the studied environment, the proposed solution includes the representation of overlapping and variable intensity activities and the use of nonregular capacity options (e.g., overtime, hiring workers, subcontracting).
Here, we define bigraphs with sharing, which solves this problem by an extension of the basic formalism: we define the place graph as a directed acyclic graph, thus allowing a natural representation of overlapping or intersecting locations.
For regions that represent the same visual quadrant (e.g., the dorsal portions of visual areas V1, V2, and V3), it is difficult to dissociate effects due to shared eccentricity representations from overlapping receptive fields.
This activity was at the level of the lip representation and overlapped a region active in production of the same syllables.
We suggest an alternative, more physiologically plausible model: voice gender representation could involve overlapping neuronal populations sensitive to male or female voices.
