Spike-phase coding boosts and stabilizes information carried by spatial and temporal spike patterns
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Spike-phase coding boosts and stabilizes information carried by spatial and temporal spike patterns. / Kayser, Christoph; Montemurro, Marcelo A; Logothetis, Nikos K; Panzeri, Stefano.
In: NEURON, Vol. 61, No. 4, 26.02.2009, p. 597-608.Research output: SCORING: Contribution to journal › SCORING: Journal article › Research › peer-review
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TY - JOUR
T1 - Spike-phase coding boosts and stabilizes information carried by spatial and temporal spike patterns
AU - Kayser, Christoph
AU - Montemurro, Marcelo A
AU - Logothetis, Nikos K
AU - Panzeri, Stefano
PY - 2009/2/26
Y1 - 2009/2/26
N2 - Several neural codes have been proposed in order to explain how neurons encode sensory information. Here we tested the hypothesis that different codes might be employed concurrently and provide complementary stimulus information. Quantifying the information encoded about natural sounds in the auditory cortex of alert animals, we found that temporal spike-train patterns and spatial populations were both highly informative. However, the relative phase of slow ongoing rhythms at which these (temporal or population) responses occurred provided much additional and complementary information. Such nested codes combining spike-train patterns with the phase of firing were not only most informative, but also most robust to sensory noise added to the stimulus. Our findings suggest that processing in sensory cortices could rely on the concurrent use of several codes that combine information across different spatiotemporal scales. In addition, they propose a role of slow cortical rhythms in stabilizing sensory representations by reducing effects of noise.
AB - Several neural codes have been proposed in order to explain how neurons encode sensory information. Here we tested the hypothesis that different codes might be employed concurrently and provide complementary stimulus information. Quantifying the information encoded about natural sounds in the auditory cortex of alert animals, we found that temporal spike-train patterns and spatial populations were both highly informative. However, the relative phase of slow ongoing rhythms at which these (temporal or population) responses occurred provided much additional and complementary information. Such nested codes combining spike-train patterns with the phase of firing were not only most informative, but also most robust to sensory noise added to the stimulus. Our findings suggest that processing in sensory cortices could rely on the concurrent use of several codes that combine information across different spatiotemporal scales. In addition, they propose a role of slow cortical rhythms in stabilizing sensory representations by reducing effects of noise.
KW - Acoustic Stimulation
KW - Animals
KW - Auditory Cortex/cytology
KW - Data Interpretation, Statistical
KW - Electroencephalography
KW - Electrophysiology
KW - Evoked Potentials, Auditory/physiology
KW - Information Theory
KW - Macaca mulatta
KW - Nerve Net/chemistry
KW - Sensation/physiology
KW - Sensory Receptor Cells/physiology
U2 - 10.1016/j.neuron.2009.01.008
DO - 10.1016/j.neuron.2009.01.008
M3 - SCORING: Journal article
C2 - 19249279
VL - 61
SP - 597
EP - 608
JO - NEURON
JF - NEURON
SN - 0896-6273
IS - 4
ER -