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Figure 2

Nature Neuroscience  4, 1055 - 1056 (2001)

Coding the temporal structure of sounds in auditory cortex

David R. Moore, Jan W. H. Schnupp & Andrew J. King
Fig 2 full size
Figure 2. Amount of stimulus-related information of two neurons in rat somatosensory cortex, estimated using information theoretical measures under the assumption that the neuron uses either a rate or a spike timing code.
The authors analyzed time windows of increasing length after stimulus onset. For a rate-coding neuron, one might expect the amount of information to increase for longer time windows, as firing rate estimates should improve when based on longer observation periods. For neuron A, this seems indeed to be the case. However, for neuron B, the rate-based information actually declined when longer analysis windows were considered, whereas the information derived from putative spike timing codes increased. Note that in both cases the amount of information transmitted by spike timing is at least equal to, if not greater than, that transmitted by rate. Based on data from Panzeri and colleagues6.

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