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Rate, not selectivity, determines neuronal population coding accuracy in auditory cortex.
- Source :
-
PLoS Biology . 11/01/2017, Vol. 15 Issue 11, p1-22. 22p. 6 Graphs. - Publication Year :
- 2017
-
Abstract
- The notion that neurons with higher selectivity carry more information about external sensory inputs is widely accepted in neuroscience. High-selectivity neurons respond to a narrow range of sensory inputs, and thus would be considered highly informative by rejecting a large proportion of possible inputs. In auditory cortex, neuronal responses are less selective immediately after the onset of a sound and then become highly selective in the following sustained response epoch. These 2 temporal response epochs have thus been interpreted to encode first the presence and then the content of a sound input. Contrary to predictions from that prevailing theory, however, we found that the neural population conveys similar information about sound input across the 2 epochs in spite of the neuronal selectivity differences. The amount of information encoded turns out to be almost completely dependent upon the total number of population spikes in the read-out window for this system. Moreover, inhomogeneous Poisson spiking behavior is sufficient to account for this property. These results imply a novel principle of sensory encoding that is potentially shared widely among multiple sensory systems. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 15449173
- Volume :
- 15
- Issue :
- 11
- Database :
- Academic Search Index
- Journal :
- PLoS Biology
- Publication Type :
- Academic Journal
- Accession number :
- 125991188
- Full Text :
- https://doi.org/10.1371/journal.pbio.2002459