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. 2003 Aug;122(2):191–206. doi: 10.1085/jgp.200308824

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Copyright © 2003, The Rockefeller University Press

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Figure 4. — Information rate of photoreceptor responses depends on the stimulus history. (A) A bright light stimulus consisting of 3 identical naturalistic intensity sequences, each lasting one second and numbered #1, #2, and #3, followed by a one second long dark period is repeated 1,000 times (above). A typical photoreceptor response to it (below). (B) The photoreceptor responses for these three groups are separated and grouped retaining the chronological order. The gray symbols correspond to the first 30 repetitions with an extra adaptive component that overestimates the noise. Notice that responses to the first naturalistic stimulus sequence are slightly larger than the responses to the second and third stimulus sequences. Below is shown how R _S, R, and R _N of the responses behave during the experiment. The information rate of the voltage responses to the first naturalistic stimulus sequence is ∼10% higher than the information rates of the second and third stimulus sequences. (C) This behavior was consistent in all the recordings (n = 6) giving the first second of responses on average 9.5% higher information transfer rates.